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ARPES Detection of Superconducting Gap Sign in Unconventional Superconductors
Qiang Gao, Jin Mo Bok, Ping Ai +20
Superconductivity is realized by opening a gap in the superconducting state. The gap symmetry is crucial in understanding the underlying superconductivity mechanism. The magnitude…
The near room-temperature upsurge of electrical resistivity in Lu-H-N is not superconductivity, but a metal-to-poor-conductor transition
Di Peng, Qiaoshi Zeng, Fujun Lan +3
Since the discovery of superconductivity in mercury at 4 K in 1911, searching for materials with superconductivity at higher temperatures towards practical conditions has been a pr…
Microscopic resolution of superconducting electrons in ultrahigh-pressed hydrogen sulfide
Jian-Feng Zhang, Bo Zhan, Miao Gao +4
We investigate the electronic and phonon properties of hydrogen sulfide (SH) under ultrahigh pressure to elucidate the origin of its high-T superconductivity. Contrary to t…
Superconducting-insulating phase transition in pressurized Ba1-xKxBiO3
Jinyu Han, Xiangde Zhu, Jianfeng Zhang +15
We report the first observation of a pressure-induced transition from a superconducting (SC) to an insulating (I) phase in single-crystal Ba1-xKxBiO3 (x = 0.4, 0.43, 0.52, and 0.58…
No evidence of superconductivity in the compressed sample prepared from the lutetium foil and H2/N2 gas mixture
Shu Cai, Jing Guo, Haiyun Shu +10
A material described as lutetium-hydrogen-nitrogen (Lu-H-N in short) was recently claimed to have near-ambient superconductivity[Gammon et al, Nature 615, 244, 2023]. If the result…
Two Distinct Charge Orders in Infinite-layer PrNiO2+δ revealed by Resonant X-ray Diffraction
Xiaolin Ren, Ronny Sutarto, Qiang Gao +9
A broken translation symmetry has recently been revealed in infinite-layer nickelates, which has piqued considerable interest in its origin and relation to superconductivity, as we…
Pressure-induced coevolution of transport properties and lattice stability in CaK(Fe1-xNix)4As4 (x= 0.04 and 0) superconductors with and without spin-vortex crystal state
Pengyu Wang, Chang Liu, Run Yang +15
Here we report the first investigation on correlation between the transport properties and the corresponding stability of the lattice structure for CaK(Fe1-xNix)4As4 (x=0.04 and 0)…
Stabilizing a hydrogen-rich superconductor at 1 GPa by the charge-transfer modulated virtual high-pressure effect
Miao Gao, Peng-Jie Guo, Huan-Cheng Yang +5
Applying pressure around megabar is indispensable in the synthesis of high-temperature superconducting hydrides, such as SH and LaH. Stabilizing the high-pressure phase…
The breakdown of both strange metal and superconducting states at a pressure-induced quantum critical point in iron-pnictide superconductors
Shu Cai, Jinyu Zhao, Ni Ni +11
The strange metal (SM) state, characterized by a linear-in-temperature resistivity, is often seen in the normal state of high temperature superconductors. It is believed that the S…
Strain-induced enhancement of in infinite-layer PrSrNiO films
Xiaolin Ren, Jiarui Li, Wei-Chih Chen +13
The mechanism of unconventional superconductivity in correlated materials remains a great challenge in condensed matter physics. The recent discovery of superconductivity in infini…
Phonon-mediated high-temperature superconductivity in ternary borohydride KBH around 12 GPa
Miao Gao, Xun-Wang Yan, Zhong-Yi Lu +1
Discovery of high-temperature superconductivity in hydrogen-rich compounds has fuelled the enthusiasm for finding materials with more promising superconducting properties among hyd…
Quasi-uniaxial pressure induced superconductivity in stoichiometric compound UTe
Chongli Yang, Jing Guo, Yazhou Zhou +14
The recent discovery of superconductivity in heavy Fermion compound UTe2, a candidate topological and triplet-paired superconductor, has aroused widespread interest. However, to da…
Observation of nearly identical superconducting transition temperatures in pressurized Weyl semimetal MIrTe4 (M=Nb and Ta)
Sijin Long, Shu Cai, Rico Schonemann +13
Here we report the observation of pressure-induced superconductivity in type-II Weyl semimetal (WSM) candidate NbIrTe4 and the evolution of its Hall coefficient (RH), magnetoresist…
Universal scaling of the critical temperature and the strange-metal scattering rate in unconventional superconductors
Jie Yuan, Qihong Chen, Kun Jiang +17
Dramatic evolution of properties with minute change in the doping level is a hallmark of the complex chemistry which governs cuprate superconductivity as manifested in the celebrat…
Enhancement of Superconductivity Linked with Linear-in-Temperature/Field Resistivity in Ion-Gated FeSe Films
Xingyu Jiang, Mingyang Qin, Xinjian Wei +25
Iron selenide (FeSe) - the structurally simplest iron-based superconductor, has attracted tremendous interest in the past years. While the transition temperature (Tc) of bulk FeSe…
Magnetic field-tuned quantum criticality in optimally electron-doped cuprate thin films
Xu Zhang, Heshan Yu, Qihong Chen +14
Antiferromagnetic (AF) spin fluctuations are commonly believed to play a key role in electron pairing of cuprate superconductors. In electron-doped cuprates, it is still in paradox…
Superconductivity in Scandium Borocarbide with orbital hybridization
W. Wu, Y. J. Li, J. H. Zhang +8
Exploration of superconductivity in light element compounds has drawn considerable attention because those materials can easily realize the high superconductivity, such as…
Universal quantum transition from superconducting to insulating states in pressurized Bi2Sr2CaCu2O8+δ superconductors
Yazhou Zhou, Jing Guo, Shu Cai +14
Copper oxide superconductors have continually fascinated the communities of condensed matter physics and material sciences because they host the highest ambient-pressure supercondu…
Correlation between Fermi surface reconstruction and superconductivity in pressurized FeTe0.55Se0.45
Gongchang Lin, Jing Guo Yanglin Zhu, Shu Cai +8
Here we report the first results of the high-pressure Hall coefficient (RH) measurements, combined with the high-pressure resistance measurements, at different temperatures on the…
RSAVS superconductors: materials with a superconducting state that is robust against large volume shrinkage
Cheng Huang, Jing Guo, Jianfeng Zhang +9
TThe transition temperature (TC) between normal and superconducting states usually exhibits a dramatic increase or decrease with increasing applied pressure. Here we present, in co…
Strong coupling superconductivity in trilayer film LiBC
Miao Gao, Xun-Wang Yan, Zhong-Yi Lu +1
Coupling between -bonding electrons and phonons is generally very strong. To metallize -electrons provides a promising route to hunt for new high-T superconductors. Based…
Evidence for an Additional Symmetry Breaking from Direct Observation of Band Splitting in the Nematic State of FeSe Superconductor
Cong Li, Xianxin Wu, Le Wang +26
The iron-based superconductor FeSe has attracted much recent attention because of its simple crystal structure, distinct electronic structure and rich physics exhibited by itself a…
Selective Hybridization between Main Band and Superstructure Band in BiSrCaCuO Superconductor
Qiang Gao, Hongtao Yan, Jing Liu +20
High-resolution laser-based angle-resolved photoemission measurements have been carried out on BiSrCaCuO (Bi2212) and BiSrLaCuO (Bi2201)…
AFeSe2 (A=Tl, K, Rb, or Cs): Iron-based superconducting analog of the cuprates
Xinlei Zhao, Fengjie Ma, Zhong-Yi Lu +1
It has long been a challenging task to find compounds with similar crystal and electronic structures as cuprate superconductors with low dimensionality and strong antiferromagnetic…