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Nickelate reveals nodeless gap, providing key clue to high-temperature superconductivity

Phys · · 472 words · By University; Technology
Chinese Academic Collaboration High-Temperature Superconductivity Scientific Advancement

Researchers from the University of Science and Technology of China and the Southern University of Science and Technology have observed a nodeless superconducting gap and electron-boson coupling in bilayer nickelate thin films. These findings, published in the journal Science, provide evidence regarding the superconducting gap symmetry and pairing mechanisms in high-temperature superconductors.

open_in_new Read the original article: https://phys.org/news/2026-05-nickelate-reveals-nodeless-gap-key.html

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10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

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Loaded Language 70% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

9 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

info Single Source 4
help Insufficient Evidence 2
verified Verified By Reference 1
check_circle Corroborated 1
verified Verified 1
info
“scientists observed a nodeless superconducting gap and discovered electron-boson coupling by measuring the electronic structures of Ruddlesden-Popper bilayer nickelate superconducting thin films”
SINGLE SOURCE
While one web result mentions ARPES on Ruddlesden-Popper bilayer nickelate thin films, the specific findings of a 'nodeless superconducting gap' and 'electron-boson coupling' are not explicitly confirmed across multiple independent sources in the provided evidence. The provided evidence for this claim consists of irrelevant public record search results.
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“This study, conducted by a team led by Prof. He Junfeng from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, in collaboration with a team led by Prof. Xue Qikun and Prof. Chen Zhuoyu from the Southern University of Science and Technology (SUSTech), was published in Science.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results to verify the specific researchers, their affiliations, or the publication in Science.
verified
“Since its discovery in 1911, superconductivity, with extreme electromagnetic properties, has become an important research direction in the scientific community.”
VERIFIED BY REFERENCE
Wikipedia and other physics sources confirm that superconductivity was discovered in 1911 (by Heike Kamerlingh Onnes).
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web search NEUTRAL — Superconductivity is a set of physical properties observed in superconductors: materials where electrical resistance vanishes and magnetic fields are expelled from the material. Unlike an ordinary met…
https://en.m.wikipedia.org/wiki/Superconductivity
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web search NEUTRAL — May 5, 2026 · Superconductivity, complete disappearance of electrical resistance in various solids when they are cooled below a characteristic temperature. This temperature, called the transition temp…
https://www.britannica.com/science/superconductivity
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web search NEUTRAL — Superconductivity is the property of certain materials to conduct direct current (DC) electricity without energy loss when they are cooled below a critical temperature (referred to as T c).
https://www.energy.gov/science/doe-explainssuperconductivity
check_circle
“In the past century, copper-based and iron-based high-TC superconductors have been discovered.”
CORROBORATED
Multiple sources confirm the discovery of copper-based (cuprates) and iron-based high-temperature superconductors.
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web search NEUTRAL — Alternatively, a superconductor is unconventional if the superconducting order parameter transforms according to a non-trivial irreducible representation of the point group or space group of the syste…
https://en.wikipedia.org/wiki/Unconventional_superconductor
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web search NEUTRAL — Japanese researchers discovered earlier this year that a new class of iron-based superconducting materials also had much higher transition temperatures than the conventional low-temperature supercondu…
https://www.newswise.com/articles/new-iron-based-and-copper-…
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web search NEUTRAL — More than 25 years ago scientists first discovered materials that were superconducting at relatively high temperatures: the cuprate-superconductors (copper-based superconductors).In 2008, new high-tem…
https://phys.org/news/2013-02-magnetic-interactions-fundamen…
verified
“The researchers have carried out measurements on Ruddlesden-Popper bilayer nickelate superconducting thin films using angle-resolved photoemission spectroscopy (ARPES).”
VERIFIED
A web search result explicitly mentions reporting angle-resolved photoemission spectroscopy (ARPES) on Ruddlesden-Popper bilayer nickelate thin film superconductors.
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web search NEUTRAL — Principle of angle-resolved photoemission spectroscopy.Photoemission spectra are also measured using tunable synchrotron radiation sources. The binding energies of the measured electrons are character…
https://en.wikipedia.org/wiki/Photoemission_spectroscopy
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web search NEUTRAL — A green angle formed by two red rays on the Cartesian coordinate system In geometry, an angle is formed by two lines that meet at a point. [1] Each line is called a side of the angle, and the point th…
https://en.wikipedia.org/wiki/Angle
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web search NEUTRAL — Ruddlesden-Popper bilayer nickelate thin film superconductors discovered under ambient pressure enable great possibilities for investigating electronic structures of the superconducting state. Here, w…
https://pubmed.ncbi.nlm.nih.gov/41040500/
info
“No gap node was observed in the entire momentum space, being consistent with s-wave (s±) superconducting gap symmetry.”
SINGLE SOURCE
One source mentions that exploring 'superconducting gap symmetry' in nickelates is important and that measurements were carried out, but the specific conclusion regarding s-wave symmetry is not corroborated by a second independent source in the provided text.
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web search NEUTRAL — Therefore, exploring the “superconducting gap symmetry” in nickelates is extremely important.The researchers have carried out measurements on Ruddlesden-Popper bilayer nickelate superconducting thin f…
https://en.ustc.edu.cn/info/1007/5176.htm
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web search NEUTRAL — Results Atomically resolved superconducting bilayer nickelate films. Using the gigantic-oxidative atomic-layer-by-layer epitaxy (GAE) method35, we synthesized 1.5-unit-cell (La,Pr)3Ni2O7 ultrathin fil…
https://arxiv.org/pdf/2605.14806
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web search NEUTRAL — However, the Tc in these thin films are lower than that of the bulk bilayer nickelates under pressure. Here we report the enhancement of Tconset from about 30 K to over 48 K by applying hydrostatic pr…
https://www.nature.com/articles/s41467-026-69660-1?error=coo…
info
“The researchers found a dispersion kink at ~70 meV below the Fermi level, which is a "fingerprint" of electron-boson coupling.”
SINGLE SOURCE
The provided evidence for this claim contains general definitions of 'dispersion' from Wikipedia and Britannica, but no mention of a 70 meV kink in nickelate films.
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web search NEUTRAL — Within optics, dispersion is a property of telecommunication signals along transmission lines (such as microwaves in coaxial cable) or the pulses of light in optical fiber.
https://en.wikipedia.org/wiki/Dispersion_(optics)
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web search NEUTRAL — 2 days ago · The meaning of DISPERSION is diaspora. How to use dispersion in a sentence.
https://www.merriam-webster.com/dictionary/dispersion
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web search NEUTRAL — Dispersion is any wave motion phenomenon that is associated with the propagation of individual waves at velocities that depend on their wavelengths.
https://www.britannica.com/science/dispersion-physics
info
“researchers developed a new technology based on liquid-nitrogen-cooled ultra-high vacuum low-temperature sample quenching and transfer.”
SINGLE SOURCE
One specific web result ('Chinese Scientists Discover Key Evidence...') explicitly describes the development of liquid-nitrogen-cooled ultra-high vacuum low-temperature sample quenching and transfer technology to address oxygen loss.
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web search NEUTRAL — To address the issue of oxygen loss during sample transfer, the scientists developed a new technology based on liquid-nitrogen-cooled ultra-high vacuum low-temperature sample quenching and transfer. T…
https://english.cas.cn/newsroom/research-news/202605/t202605…
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web search NEUTRAL — On the pressure developed in a liquid during the collapse of a spherical cavity.
https://www.tandfonline.com/doi/abs/10.1080/1478644080863568…
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web search NEUTRAL — Mazda Develops High-Strength Heat Resistant Bioplastic.
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help
“Jianchang Shen et al, Nodeless superconducting gap and electron-boson coupling in (La,Pr,Sm) 3 Ni 2 O 7 films, Science (2026). DOI: 10.1126/science.adw8329”
INSUFFICIENT EVIDENCE
No evidence was found in the search results to verify the specific paper title, authors, or the 2026 publication date/DOI.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.