High Temperature Superconductivity Gets Two New Clues

Estimated reading time: 10 minutes

Key Takeaways

• The cuprates with the highest transition temperatures still have to be kept below 151 kelvin (about minus 188°F), according to a Simons Foundation release carried by EurekAlert.
• An INRS-led team, with computational work from the Flatiron Institute, reported that the pseudogap and superconductivity compete for the same electrons. Their paper was published in Nature Physics on October 20, 2026.
• A separate international study, published in Nature Physics the same day, linked superconductivity in electron-doped lanthanum cerium copper oxide to scattering from fluctuating spins.
• Nigel Hussey said a second ingredient is still needed to explain the much higher transition temperatures in some materials. Neither study explains the highest temperatures across all cuprate families.
• The retrieved sources report no financing round, revenue, product launch or project cost. For founders, this is a long-term materials story, not a near-term market.

The cuprates with the highest transition temperatures, the best "high-temperature" superconductors we have, still need to stay below 151 kelvin. That is about minus 188 degrees Fahrenheit. The figure comes from a Simons Foundation release carried by EurekAlert, dated October 20, 2026. In this field, "high" is relative.

That gap between the name and the reality is why high temperature superconductivity is still an open puzzle. Two new papers in Nature Physics each add one clue. One suggests a strange quantum state called the pseudogap fights superconductivity rather than helping it. The other points to fluctuating electron spins as the glue in one family of cuprates.

For founders and operators, the signal is long-term. Better superconductors could eventually reduce cooling and energy costs. But these studies are fundamental research, and none of the retrieved sources reports a commercial milestone. Read them as a sign of where materials science is moving, not as a product pipeline.

This post covers what each team did, what the sources say, and what remains unknown. Most of the material comes from announcements by the research institutions themselves, so we label those clearly.

Why "High Temperature" Still Means Colder Than a Deep Freezer

Electricity loses energy as it moves through a copper wire. Electrons bump into the jiggling atoms and fields around them, and some of their energy turns into heat. A superconductor avoids that loss.

New Atlas, in an October 22, 2026 report by Mike McRae, offers a simple comparison. Superconductivity is to electrical power as empty roads and green lights are to a morning commute.

The trick is getting electrons to give up their loner habits. In a superconductor, they form partnerships called Cooper pairs. A pair moves through the material without the usual resistance.

What cuprates are

Cuprates are copper-oxide ceramics. They are among the best-known high-temperature superconductors. Physicists have chased low-resistance electricity under everyday conditions for roughly half a century, as New Atlas notes.

The word "high" is relative here. The Simons Foundation release says the highest-Tc cuprates must be kept below 151 K (about minus 188°F). Tc means the critical temperature, the point below which a material becomes superconducting.

That is far warmer than the ultra-cold conditions older superconductors needed. It is still much colder than any room, outdoor winter or normal factory floor.

New Atlas puts the practical goal this way: electrical systems that waste next to no energy "without needing a freezer the size of a small building." Closing that gap means understanding how superconductivity arises in these materials at all.

Why two studies, not one

The two Nature Physics papers tackle different pieces of the puzzle:

• Paper one: Light-induced Asymmetric Pseudogap Below Tc in Cuprates (INRS-led, with Flatiron Institute modeling).
• Paper two: Evidence for spin-fluctuation-mediated superconductivity in electron-doped cuprates (an international team described in a Radboud University announcement).

Both are dated October 20, 2026, in the briefing's timeline. The New Atlas article links to one paper and the other, which match the DOIs listed for the two studies.

Source: Simons Foundation release via EurekAlert, October 20, 2026; New Atlas report by Mike McRae, October 22, 2026.

Cuprate Pseudogap Competition: What the INRS Laser Experiment Saw

The first study came from a team led by Canada's National Institute of Scientific Research (INRS). The team studied the pseudogap. This is a strange state in which a material's electrons behave oddly in a pattern that looks like a partly opened energy gap.

Boschini, the senior author, is quoted by New Atlas: "The pseudogap is one of the greatest mysteries in condensed-matter physics." Fabio Boschini is an INRS physicist.

Two theories, one test

Some theories say the pseudogap helps superconductivity along, as a kind of precursor. Others say the two states are rivals. The question is which explanation fits the data.

The INRS team used a laser to temporarily disrupt superconductivity in a copper-oxide crystal. The crystal stayed relatively cold during the test, according to New Atlas.

The tug-of-war result

When the laser pulses disrupted superconductivity, the pseudogap emerged. As superconductivity came back, the pseudogap faded. The INRS release via EurekAlert describes a transient, light-induced pseudogap below the superconducting critical temperature.

New Atlas says the energy spectrum developed an imbalance that looked just like a pseudogap, and that the asymmetry disappeared as superconductivity returned. That behavior is why the paper's title includes the word "asymmetric."

The Simons Foundation release says the INRS-Flatiron collaboration found that superconductivity and the pseudogap compete rather than simply coexist as precursor and superconducting states. That is the core of the cuprate pseudogap competition idea.

What this does not show

The result does not settle what causes the pseudogap. New Atlas says plainly that the findings don't explain how cuprates reach their unusually high superconducting temperatures.

Also, this is a laser-driven, temporary effect in a crystal. It is a lab measurement of a competition, not a device.

Source: INRS release via EurekAlert, October 20, 2026; Simons Foundation release via EurekAlert, October 20, 2026; New Atlas report, October 22, 2026.

How Researchers Watched Electrons Change Over Trillionths of a Second

The pseudogap result depended on a tool that can watch electrons very quickly. It is worth understanding, because it shows how much equipment this research needs.

TR-ARPES in plain words

The team used time- and angle-resolved photoemission spectroscopy, or TR-ARPES. Light knocks electrons out of a material. By measuring how they leave, researchers can work out the electrons' energy and momentum, which is their speed and direction.

The "time-resolved" part means they can repeat this after a laser pulse and track changes over trillionths of a second, as New Atlas describes. This let the team watch the material move between superconducting and pseudogap-like states.

The INRS release says the work used the TR-ARPES endstation at the Advanced Laser Light Source. An endstation is the final station on a beamline where the experiment itself runs.

Who did what

According to the INRS announcement, Dario Armanno was first author and acquired the experimental data under Boschini's leadership. Researchers at the Flatiron Institute handled computational modeling.

The Simons Foundation release says the computational researchers tested competing models against the observations. The release presents the competing-states picture as the one that fit. Remember that both of these are institutional announcements, not outside reviews.

Who paid for it

The INRS release lists support from many groups. These include the Canada Foundation for Innovation, Sloan, NSERC, the Canada Research Chairs program, FRQNT, the Quebec Ministry of Economy, Innovation and Energy, PRIMA Quebec, and the Gordon and Betty Moore Foundation's EPiQS Initiative.

These are acknowledgments of support. The retrieved sources give no dollar amounts, no cumulative funding total and no project cost. Do not read the list as a financing round.

Source: INRS release via EurekAlert, October 20, 2026; Simons Foundation release via EurekAlert, October 20, 2026.

Why Suppressing the Pseudogap Could Matter for Higher Temperatures

If the pseudogap competes with superconductivity, it may also hold superconductivity back. That is the practical hope behind the result.

Olivier Gingras is quoted in the Simons Foundation release. He said that suppressing the pseudogap while keeping superconductivity could potentially raise the superconducting temperature. This is a researcher's estimate of what might be possible. It is not a demonstrated result.

Why "potentially" matters

Nobody in these sources reports a higher transition temperature as a result of this work. The measured fact is that the pseudogap appears when superconductivity is knocked down, and fades when it returns. The step from there to a better material is an idea, not an outcome.

New Atlas is also careful here. It says the findings do not settle what causes the pseudogap or how cuprates achieve their high superconducting temperatures.

A clue about direction, not a recipe

Think of it as a hint about where to look. If a rival state is limiting the best materials, future work could focus on understanding and weakening that rival. Whether that can be done in a real material is unknown.

This is also why the results should not be stretched. A transient effect created by a laser pulse in a crystal says little about manufacturing, cost or reliability. Those questions come much later, if at all.

Source: Simons Foundation release via EurekAlert, October 20, 2026; New Atlas report, October 22, 2026.

Spin Fluctuations and Superconductivity: The Radboud-Bristol Study

The second study asks a different question. Instead of the pseudogap, it asks what glues electrons into pairs in the first place.

New Atlas describes an international team led by physicists from Radboud University in the Netherlands and the University of Bristol in the UK. Radboud's announcement, published October 23, 2026, says the team found evidence that fluctuating spins mediate superconductivity in electron-doped lanthanum cerium copper oxide.

What a spin fluctuation is

Electrons have a property called spin. It acts like a tiny magnet pointing in some direction. In a material, those tiny magnets can wobble and flip.

New Atlas describes this as "the buzz of electrons in a cuprate lattice." The idea behind spin fluctuations superconductivity is that this buzz can pull electrons into pairs.

How the film was built

The team made a thin film by depositing lanthanum cerium copper oxide layer by layer. This created a smooth gradient in Tc, from its maximum value down to zero, across the film.

Then they used lithographically patterned electrical contacts. Lithography is a printing-style method for drawing tiny structures. The contacts allowed closely spaced resistance measurements, while keeping disorder across the film controlled, per Radboud.

The briefing also describes high-magnetic-field resistance measurements. The facilities named in the sources include HFML-FELIX.

What they found

The researchers measured how strongly mobile electrons interact with fluctuating spins. Radboud reports that this interaction correlated with Tc. Where Tc was higher, the interaction was stronger. That supports spin fluctuations as the pairing interaction in this material family.

The team's analysis points to scattering from fluctuating spins as the main measured source of resistance in this material.

What was not shown

A correlation is evidence, not a direct picture of electron pairs. This is why the Radboud title says "evidence for" spin-fluctuation-mediated superconductivity rather than claiming a final proof.

Source: Radboud University announcement, October 23, 2026; New Atlas report, October 22, 2026.

Electron-Doped Cuprates: Why One Result Does Not Cover Every Material

The spin result applies to a specific family. Doping means adding atoms that change how many mobile electrons a material has. In electron-doped cuprates, the doping adds electrons. Radboud's announcement ties its conclusion to "this material family."

The warning from Nigel Hussey

Nigel Hussey said the spin-fluctuation result does not complete the explanation. According to Radboud's announcement, comparison with earlier high-field work indicates that a second ingredient is needed. That ingredient would account for the much higher transition temperatures found in some materials.

That is a plain statement of limits. Spin fluctuations may explain pairing in this family, yet something more is required for the best performers.

Two studies, two different gaps

It helps to keep the two studies apart:

• INRS study: a competing state (the pseudogap) appears when superconductivity is suppressed.
• Radboud-led study: spin fluctuations are tied to pairing in electron-doped lanthanum cerium copper oxide.

They test different materials and ask different questions. Neither one says the other is wrong, and the sources do not combine them into one theory. New Atlas ends with a similar point: filling in every gap, "pseudo or electron," is important.

Why the scope matters for readers

Headlines about "solving" superconductivity would overstate both papers. The briefing's own summary says the findings advance understanding but do not yet explain the highest transition temperatures across all cuprate families.

Source: Radboud University announcement, October 23, 2026; New Atlas report, October 22, 2026.

What the Sources Show, and What Independent Experts Have Not Yet Said

The retrieved material supports a qualified reading, not a settled consensus.

• The INRS and Simons Foundation announcements describe the pseudogap and superconductivity as competing states. They say suppressing the pseudogap could potentially raise the critical temperature.
• Radboud University's announcement says spin fluctuations are the pairing interaction in electron-doped cuprates. It also reports Hussey's view that a second ingredient is required for the highest-Tc materials.

A caution about the sources

Nearly all of this material comes from the institutions and researchers behind the work. The Simons Foundation and INRS releases are carried by EurekAlert. That makes them hosted company and institutional announcements, not independent reporting by EurekAlert.

The available research does not include independent third-party expert commentary beyond the researchers and the institutional announcements. We are not claiming that the wider physics community has endorsed either result.

One news report surfaced in a search for this story and appeared to offer a cautious take. It could not be retrieved in full, so we do not rely on it here. What is on the record in the retrieved sources is Radboud's own scope limit: the spin result applies to this material family.

How to read the evidence

Both papers were published in Nature Physics, a peer-reviewed journal. That is a meaningful quality check. It is not the same as years of replication by other labs.

A sensible reading is that these are promising, carefully scoped results. They are steps in an ongoing debate, not the end of it.

Source: Simons Foundation release via EurekAlert, October 20, 2026; INRS release via EurekAlert, October 20, 2026; Radboud University announcement, October 23, 2026.

What This Means for Startups and Small Businesses

Here is the honest summary: this is not a product story. The retrieved sources report no financing round, commercial revenue, product launch or project operating-cost figure. The papers are fundamental research.

Still, there are practical ways to think about it.

Treat it as a long-horizon signal

Better superconductors could eventually reduce cooling and energy costs. The need for extreme cold is a major barrier, as New Atlas's "freezer the size of a small building" line suggests. Progress in understanding why these materials work is a step toward lowering that barrier.

But no source gives a timeline. Do not build a business plan around a date.

What founders can do now

• Watch, don't bet. If you work in energy, cryogenics, sensors, medical imaging or computing hardware, follow the research. Do not budget for superconductor-based products yet.
• Read press releases carefully. Words like "evidence for," "potentially" and "targeting" describe possibilities. A result in a lab crystal is not a proven product.
• Look at the supply chain of knowledge. The work relied on specialized facilities such as the Advanced Laser Light Source and on public funders listed in the sources. Deep-tech startups in this area often depend on similar shared facilities and grants.
• Check the scope of any claim. A result about electron-doped lanthanum cerium copper oxide is not a result about all high-temperature superconductors.
• Save your own time for what you can control. Research moves slowly, so the near-term gains for most small businesses come from running leaner today.

The bottom line for operators

Two clues do not make a map. The pseudogap result narrows one question, and the spin result narrows another. For now, the right move is to stay informed and keep your own costs and workflows under control.

Source: Simons Foundation release via EurekAlert, October 20, 2026; INRS release via EurekAlert, October 20, 2026; Radboud University announcement, October 23, 2026; New Atlas report, October 22, 2026.

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