Room-Temperature Superconductor Finally Found?

Room-Temperature Superconductor Finally Found? — Sabine Hossenfelder

Sabine Hossenfelder

AI-assisted summary of Room-Temperature Superconductor Finally Found? — original source. Check the original for full context.

Source published:

Key ideas

  • A Russian research team released an unreviewed preprint claiming to observe magnetic flux line trapping—a core signature of type-II superconductivity—in processed graphite at temperatures up to 390 K (about 117 °C). (1:49)
  • The preparation requires grinding bulk graphite for 30 hours into nanometer-thick flakes and baking them in open air at 400 °C for 24 hours, forming a network of micro-wrinkles. (1:49)
  • The study does not include a direct measurement of zero electrical resistance, an omission caused by the severe technical difficulty of probing sub-micrometer flakes without contact resistance artifacts. (1:49)
  • Because the recipe uses accessible, low-cost equipment, independent laboratories worldwide are expected to quickly verify or refute the claims, though Sabine rates it a 7 out of 10 on her skepticism meter. (3:20)

Detailed notes

## Background Published on YouTube by Sabine Hossenfelder on September 27, 2026, this video examines a newly surfaced preprint claiming the discovery of an accessible room-temperature superconductor candidate. According to the page description, a research team in Russia reports finding a key signature of superconductivity surviving well above room temperature in ordinary ground-up, baked graphite—a recipe simple enough for labs worldwide to test.

## TL;DR Physicist Sabine Hossenfelder analyzes an unreviewed preprint from Russian researchers claiming that mechanically ground bulk graphite baked in air exhibits magnetic flux line trapping up to roughly 120 °C (390 K). While this pinning effect is a recognized signature of type-II superconductivity, the study notably lacks direct zero-resistance electrical measurements, which are notoriously difficult on sub-micrometer flakes. Tempered by the recent memory of past failures like LK-99 and Ranga Dias's retracted papers, Sabine rates the claim a 7 out of 10 on her 'bullshit meter' while highlighting that its simple preparation will allow rapid replication attempts by both human researchers and competing AI labs.

## Atmosphere & style The presentation is dryly humorous, biting, and scientifically grounded, characterized by Sabine's signature deadpan delivery and satirical barbs about European technological stagnation. It balances genuine curiosity about an accessible experimental recipe with a seasoned, weary skepticism born from years of overhyped superconductor breakthroughs. Watching it feels like getting a sharp, no-nonsense reality check that cuts through viral physics headlines with calculated amusement.

## Bulletin - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) A Russian research team released an unreviewed preprint claiming to observe magnetic flux line trapping—a core signature of type-II superconductivity—in processed graphite at temperatures up to 390 K (about 117 °C). - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) The preparation requires grinding bulk graphite for 30 hours into nanometer-thick flakes and baking them in open air at 400 °C for 24 hours, forming a network of micro-wrinkles. - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) The study does not include a direct measurement of zero electrical resistance, an omission caused by the severe technical difficulty of probing sub-micrometer flakes without contact resistance artifacts. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Because the recipe uses accessible, low-cost equipment, independent laboratories worldwide are expected to quickly verify or refute the claims, though Sabine rates it a 7 out of 10 on her skepticism meter.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) All confirmed superconductors currently require cooling below −100 °C, though fundamental physical principles do not rule out ambient room-temperature operation. - [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) Achieving room-temperature superconductivity would transform power grids, electronics, supercomputers, and magnetic confinement systems for nuclear fusion. - [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) Unlike complex or exotic compounds, the newly proposed candidate material is common graphite subjected to standard mechanical and thermal processing. - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) A preprint by Russian researchers claims to identify superconducting signatures persisting at and above 390 K (117 °C). - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) The synthesis involves ball-milling graphite into micrometer-wide, nanometer-thick flakes and baking them in open air at 400 °C for 24 hours. - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) Microscopic examination showed that baking in open air creates a dense network of micro-wrinkles, which is absent in untreated or vacuum-baked samples. - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) When cooled to 10 K in a magnetic field, the wrinkled graphite exhibited magnetic flux line trapping that persisted even when heated past room temperature to roughly 120 °C. - [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) Direct zero-resistance verification is missing because contact and probe resistance present major technical hurdles on ultra-thin, sub-micrometer flakes. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Wrinkled graphite was previously studied as a potential superconductor several years ago, but those findings were never replicated. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Magnetic flux trapping alone does not constitute definitive proof of superconductivity and does not prove the material can be drawn into functional wires. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Sabine rates the claim a 7 out of 10 on her skepticism meter, emphasizing that the paper is an unreviewed preprint in a field prone to false alarms. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) The simple preparation recipe allows independent laboratories around the world to test and replicate the findings rapidly. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Past room-temperature superconductor claims, such as Ranga Dias's discredited publications and LK-99's impurity artifacts, underscore the need for caution. - [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Human researchers are currently competing against approximately one thousand AI research labs in the race to uncover ambient superconductors.

## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) The Promise and Hyped Potential of Room-Temperature Superconductors

Physics is completely packed with "supers": physicists constantly talk about supersymmetry, superfluids, quantum superpositions, supermassive black holes, supercooled liquids, and, of course, superconductors. In real-world physics, superconductors are far from hypothetical. They are materials whose electrical resistance plummets to virtually zero, allowing electrical currents to flow indefinitely without any energy loss. The frustrating catch is that every confirmed superconductor discovered so far requires super-low temperatures to operate—typically plunging below −100 °C. Yet fundamental physics dictates no reason why superconductivity cannot occur at ambient room temperature.

If a true ambient-pressure, room-temperature superconductor were uncovered, the technological consequences would be revolutionary. It would radically transform energy efficiency across all electronics and overhaul power grids. Sabine cannot resist poking fun at European technological ambitions, noting that lossless power transmission means "we could finally plaster the Sahara desert with solar panels to power Europe's non-existing data centers." Similarly, room-temperature superconductors would make it vastly simpler to construct powerful magnets needed to achieve nuclear fusion ignition—again, "to power Europe's non-existing data centers"—and build faster supercomputers "to speed up Europe's non-existing data centers." In any case, Europe could simply "sell it to China." The most refreshing twist about this latest preprint is that the candidate material is not an exotic, hard-to-synthesize compound; it is ordinary graphite given a peculiar mechanical and thermal treatment, making it considerably easier to source than fictional "unobtanium."

[01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) Wrinkled Graphite and Trapped Magnetic Flux

The new claim arrives via an unreviewed preprint from a research team in Russia, asserting that they have observed "one of the key signatures of superconductivity" surviving at and above 390 K (roughly 117 °C). Their preparation recipe began by mechanically grinding bulk graphite for 30 hours, reducing it to tiny flakes measuring several micrometers across and merely tens of nanometers in thickness. From there, they split the flakes into three experimental batches: one sample was kept completely as-is, the second was baked in a vacuum, and the third was heated in open air for 24 hours at approximately 400 °C.

```mermaid flowchart TD accTitle: Preparation and Testing of Wrinkled Graphite accDescr: Flowchart detailing the Russian team's mechanical and thermal processing of graphite to produce magnetic flux trapping.

subgraph PREP["Graphite Preparation"] A["Bulk Graphite"] -->|"Ball-mill grind for 30 hours"| B["Flakes (micrometer-wide, nm-thick)"] end

subgraph TREATMENT["Thermal Treatment Batches"] B --> C["Sample 1: As-is (control)"] B --> D["Sample 2: Heated in vacuum"] B --> E["Sample 3: Baked in air (24 hrs at 400°C)"] end

subgraph TESTING["Testing & Discovery"] E --> F["Forms dense network of micro-wrinkles"] F --> G["Cooled to 10 K with magnetic field"] G --> H["Magnetic flux line trapping observed"] H -->|"Heated to ~120°C (390 K)"| I["Trapping signature persists"] end ```

Under an electron microscope, only the third sample—the graphite baked in air—revealed a dense, interlocking network of micro-wrinkles. When the researchers cooled this wrinkled graphite down to 10 K and introduced a magnetic field, slightly displacing the field caused the magnetic field lines to become pinned in place. This phenomenon, known as magnetic flux line trapping, represents a quintessential calling card of superconducting materials. Crucially, when they warmed the sample up past room temperature to nearly 120 °C, the flux-trapping effect stubbornly remained intact.

- **Key experimental omission:** The researchers did not directly measure electric resistance dropping to zero. Measuring zero resistance on sub-micrometer, ultra-thin flakes is notoriously difficult because contact and probe resistance can dwarf the sample's signal, a stumbling block that previously derailed claims around LK-99. - **Why flux trapping matters:** Even without a zero-resistance trace, magnetic flux line pinning is a fundamental hallmark of type-II superconductivity, qualifying the wrinkled graphite as a legitimate candidate worthy of inspection.

[03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) Cautious Skepticism and the Race Between Humans and AI

The notion of wrinkled graphite acting as a superconductor is not completely unprecedented; a paper exploring the concept surfaced several years ago, though it was never successfully replicated. Nevertheless, Sabine warns that heavy skepticism is warranted. Aside from remaining an unvetted preprint, the presence of magnetic flux trapping does not constitute definitive proof of superconductivity, nor does it demonstrate that such wrinkled flakes could ever be fabricated into practical, wire-like electronic components. On her personal "bullshit meter," she rates the announcement a 7 out of 10. The major redeeming factor is that the recipe requires straightforward, accessible equipment, allowing independent laboratories worldwide to confirm or debunk the findings very quickly.

The scientific landscape is cluttered with the wreckage of previous room-temperature superconductor announcements. Every few years, a sensational claim emerges: Ranga Dias published high-profile room-temperature superconductor papers that could not be replicated and ended under clouds of academic fraud allegations; more recently, the viral LK-99 hype cycle collapsed once independent teams demonstrated that its apparent transitions stemmed from copper sulfide impurities and flawed resistivity artifacts. Now, human experimentalists are racing alongside approximately one thousand AI research labs pursuing the exact same materials breakthrough in an ultimate human-versus-machine faceoff. Sabine quips that viewers should not worry if machine intelligence prevails, because "if AI wins, it will summarize the result for you in five simple bullet points." She closes the report by acknowledging her community supporters on Patreon and YouTube, noting that viewer contributions keep her independent channel running without outside corporate sponsors.

## Notable quotes > [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) we could finally plaster the Sahara desert with solar panels to power Europe's non-existing data centers. — Sabine Hossenfelder

> [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) to power Europe's non-existing data centers — Sabine Hossenfelder

> [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) to speed up Europe's non-existing data centers. — Sabine Hossenfelder

> [00:00](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=0s) sell it to China. — Sabine Hossenfelder

> [01:49](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=109s) one of the key signatures of superconductivity — Sabine Hossenfelder

> [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) bullshit meter — Sabine Hossenfelder

> [03:20](https://www.youtube.com/watch?v=1RoTQ3hP4Uk&t=200s) if AI wins, it will summarize the result for you in five simple bullet points. — Sabine Hossenfelder

## Mentioned Sabine Hossenfelder, LK-99, Ranga Dias, Patreon, YouTube

## Video description 👉 Support me on Patreon ➜ https://www.patreon.com/Sabine 👕T-shirts, mugs, posters and more: ➜ https://sabines-store.dashery.com/ 💌 Support me on Donorbox ➜ https://donorbox.org/swtg

There's a new candidate for a room temperature superconductor, and it isn't some exotic compound, it's graphite, just ground up and baked. A team in Russia says they have found one of the key signatures of superconductivity that survives well above room temperature. The good news is that anyone can try to reproduce this. Let's take a look.

Paper: https://doi.org/10.48550/arXiv.2609.15712

#superconductor #physics #sciencenews #materialsscience #science

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[Source](https://www.youtube.com/watch?v=1RoTQ3hP4Uk)

中文简报

室温超导体终于被发现了？ 物理学家 Sabine Hossenfelder 分析了一篇来自俄罗斯研究人员的未经同行评审的预印本论文，该论文声称机械研磨并在空气中烘烤的块状石墨在最高约 120 °C（390 K）的温度下表现出磁通线捕获现象。尽管这种钉扎效应是第二类超导性的公认特征，但该研究明显缺乏直接的零电阻电学测量，而对亚微米级薄片进行该测量极为困难。鉴于近期 LK-99 和 Ranga Dias 论文被撤等失败案例的前车之鉴，Sabine 在她的“胡扯指数”上给这一说法打了 7 分（满分 10 分），但她同时也强调，其简单的制备方法将让人类研究人员以及相互竞争的 AI 实验室能够迅速展开复现尝试。 一支俄罗斯研究团队发布了一篇未经同行评审的预印本，声称在处理后的石墨中观察到了磁通线捕获现象（第二类超导性的核心特征），温度最高可达 390 K（约 117 °C）。 (1:49) 该制备方法需要将块状石墨研磨 30 小时成纳米厚度的薄片，并在 400 °C 的常压空气中烘烤 24 小时，从而形成微皱褶网络。 (1:49) 该研究未包含零电阻的直接测量，这一缺失是由于在消除接触电阻干扰的前提下探测亚微米薄片存在极高的技术难度。 (1:49) 由于该配方使用的是易于获取的低成本设备，预计全球独立实验室将迅速验证或证伪这一论断，不过 Sabine 在怀疑度评分中给出了 7 分（满分 10 分）。 (3:20)

Reading summary

A Russian research preprint claims that ordinary graphite subjected to mechanical grinding and open-air baking exhibits magnetic flux line trapping above 390 K (roughly 117 °C), a recognized signature of superconductivity. Physicist Sabine Hossenfelder urges cautious skepticism, emphasizing that the paper lacks direct electrical resistance measurements and emerges from a field marked by frequent, unverified breakthroughs. Mechanical and Thermal Processing of Graphite (1:49) While known superconductors require temperatures below −100 °C to eliminate electrical resistance, fundamental physical principles do not rule out superconductivity at ambient temperatures and pressures. Unlike past room-temperature candidates requiring rare elements or extreme synthesis conditions, the material evaluated in the Russian preprint is derived from standard bulk graphite. The authors ball-milled bulk graphite for 30 hours, reducing it to flakes measuring several micrometers across and tens of nanometers in thickness. The experiment divided the milled graphite into three experimental batches: an untreated control, a sample heated in a vacuum, and a sample baked in open air at approximately 400 °C for 24 hours. Electron microscopy showed that only the air-baked sample developed a dense, interlocking network of micro-wrinkles, which the researchers identified as the essential structural condition for their subsequent magnetic observations. Magnetic Flux Trapping and Experimental Limits (1:49) When cooled to 10 K inside a magnetic field and slightly displaced, the air-baked wrinkled graphite displayed magnetic flux line trapping—a phenomenon characteristic of type-II superconductors where magnetic field lines remain pinned in the material. Crucially, the authors reported that this flux-trapping signature remained intact as the sample was warmed past room temperature to roughly 120 °C (390 K). Despite this signal, the experiment omitted direct measurement of zero electrical resistance. Measuring resistance on sub-micrometer, nanometer-thin flakes is technically demanding because contact and probe resistance can easily overwhelm the true signal. While magnetic flux trapping makes the material an intriguing candidate, Hossenfelder highlights that flux pinning by itself does not constitute definitive proof of superconductivity, nor does it demonstrate that such flakes could be fabricated into usable conducting wires. Replication Prospects and Past Superconductor Scandals (3:20) Hossenfelder assigns the preprint a 7 out of 10 on her personal skepticism scale, noting that an earlier proposal involving wrinkled graphite surfaced several years ago without independent confirmation. The announcement follows a string of high-profile failures in the field, including retracted research by Ranga Dias that faced non-replication and academic fraud allegations, as well as the LK-99 hype cycle, which unraveled when independent teams identified copper sulfide impurities and probe artifacts as the true causes of its behavior. The primary positive factor for the new claim is its accessibility: because the preparation uses standard graphite and basic thermal treatment rather than extreme pressures, independent laboratories can quickly test and either replicate or debunk the findings. The development also coincides with an accelerating research race, where traditional human experimentalists compete against approximately one thousand AI research labs focused on materials discovery. Whether wrinkled graphite represents a legitimate breakthrough hinges on independent reproduction and direct confirmation of zero electrical resistance. Until outside laboratories verify both the magnetic pinning and lossless current transport, the findings remain an unreviewed claim within a discipline historically prone to premature excitement.

Source quotes

[0:00] Sabine Hossenfelder: we could finally plaster the Sahara desert with solar panels to power Europe's non-existing data centers. [0:00] Sabine Hossenfelder: to power Europe's non-existing data centers [0:00] Sabine Hossenfelder: to speed up Europe's non-existing data centers. [0:00] Sabine Hossenfelder: sell it to China. [1:49] Sabine Hossenfelder: one of the key signatures of superconductivity [3:20] Sabine Hossenfelder: bullshit meter [3:20] Sabine Hossenfelder: if AI wins, it will summarize the result for you in five simple bullet points.

Original transcript

[0:00] We have a new candidate for a room temperature  superconductor. It's not a peer-reviewed paper, [0:07] but of course that wouldn't stop me from getting  excited about it. Let's have a look. Physics is [0:13] full of supers. We have super symmetry  and super fluids and super positions. We [0:18] have super massive black holes and super cooled  liquids. And of course, we have superconductors. [0:25] Superconductors are materials whose electric  resistance drops to almost zero. This means [0:31] that electric currents can travel without loss.  Superconductors are not hypothetical. We know many [0:38] materials which have this property. The problem  is that they usually only become superconducting [0:44] at super low temperature below - 100 Celsius  or so. There is however no reason why this [0:52] needs to be the case. In principle, a material  could be superconducting at room temperature. [0:57] And if we found such a material, that would  be a pretty big deal because it'd make almost [1:03] all electronics dramatically more efficient. It  would make it easier to transport electricity. So, [1:08] we could finally plaster the Sahara desert with  solar panels to power Europe's non-existing data [1:14] centers. It would make it easier to build strong  magnets and with that achieve nuclear fusion [1:19] ignition to power Europe's non-existing data  centers and that it make supercomputers faster [1:25] to speed up Europe's non-existing data centers.  It would be great because we could sell it to [1:30] China. The new paper is quite remarkable because  the new candidate for a superconductor isn't some [1:37] complicated new material. It's graphite just  with a weird treatment. encouraging because [1:43] graphite is somewhat easier to obtain than  unobtanium. The new result comes from a team [1:49] in Russia. They write they found quote one of  the key signatures of superconductivity and [1:56] that persists up to 390 Kelvin and above.  For this they ground the graphite for 30 [2:03] hours which produced flakes a few micrometers  across and only tens of nanometers thick. They then [2:09] divided the material into different samples. One  they left as it was, one they heated in vacuum, [2:15] and the third they heated in air for 24 hours at  about 400° C. It's this third group that developed [2:22] interesting properties. They used an electron  microscope and found that the graphite had [2:27] developed a dense network of tiny wrinkles. They  cooled the wrinkled graphite down to 10 Kelvin [2:34] and applied a magnetic field. When they slightly  dislocated the magnetic field, they found that the [2:39] field lines had gotten trapped. This magnetic  field trapping is the key signature of super- [2:45] conductivity that they refer to. They then heated  the material to almost 120° C and showed that the [2:51] effect survived. Now, let me be clear. They did  not directly show that the electric resistance [2:57] dropped to near zero. as we've seen with the LK99  episode a few years back. This is actually a very [3:03] difficult measurement to do especially with such  small samples because whatever you use to measure [3:09] the sample also has a resistivity and you somehow  have to properly account for that and the magnetic [3:15] flux line trapping is indeed a key property  of superconductors. So it's an interesting [3:20] candidate. No more and no less. How crazy is this?  Not super crazy indeed. There was a paper already [3:28] a few years ago about such wrinkled graphite  being a potential superconductor. However, [3:34] this finding was never reproduced until now.  So, this isn't entirely out there. However, [3:39] I must warn you that this is a preprint and not  a peer-reviewed paper. Even if it was correct, [3:45] this wouldn't prove that the material  superconducting. And even if that turns [3:49] out to be the case, that still be the question  of whether the material can be produced in [3:54] a form that makes it useful in electronic  applications. So I give this a 7 out of 10 [4:00] on the [ __ ] meter. They haven't actually looked  at electric resistance, though understandably so, [4:06] meaning we don't know anything about the  conductivity. But I think it speaks in the [4:11] author's favor that the procedure seems quite easy  to reproduce by other labs. So their findings can [4:17] be independently checked and I expect this will  happen soon. A lot of labs all over the world are [4:23] working on room temperature superconductors. It's  not just because the impact could be so huge but [4:29] also because the required equipment is relatively  modest. This is why every couple of years we have [4:35] a new candidate. So far none of them has been  confirmed. There was for example Ranga Dias' [4:42] discovery from a few years ago that however  was never reproduced and allegations of fraud [4:47] were raised against him. Then there was the LK99  summary excitement that eventually turned out to [4:53] be a faulty measurement of resistivity. And now this  meanwhile about a thousand AI labs are trying to [5:01] do the same thing. This might be the ultimate  showoff of humans versus AI. But don't worry, [5:08] if AI wins, it will summarize the result for  you in five simple bullet points. This video [5:14] does not have a sponsor, which means that I paid  to bring it to you. If you like my science news, [5:21] please consider supporting me on Patreon or right  here on YouTube. If you already support me, thank [5:27] you so very much. A big thank you especially to  my supporters in Patreon tier 4 and higher. This [5:33] channel would not be possible without your help.  Yet another way to help me is to buy a t-shirt in [5:38] my store. Most of the revenue goes straight into  my videos. Thanks for watching. See you tomorrow.