Spectroscopic Evidence of Superconductivity Pairing at 83 K in Single-Layer FeSe/SrTiO3 Films.
Yu Xu,Hongtao Rong,Qingyan Wang,Dingsong Wu,Yong Hu,Yongqing Cai,Qiang Gao,Hongtao Yan,Cong Li,Chaohui Yin,Hao Chen,Jianwei Huang,Z. G. Zhu,Yuan Huang,Guodong Liu,Zuyan Xu,Lin Zhao,Xingjiang Zhou +17 more
Reads0
Chats0
TLDR
Spectroscopic evidence of superconductivity pairing at 83 K in single-layer FeSe/STO films provides a new definitive benchmark of super conductivity pairing that is directly observed up to 83 K and finds that the pairing state can be further divided into two temperature regions.Abstract:
Single-layer FeSe films grown on the SrTiO3 substrate (FeSe/STO) have attracted much attention because of their possible record-high superconducting critical temperature Tc and distinct electronic structures in iron-based superconductors. However, it has been under debate on how high its Tc can really reach due to the inconsistency of the results obtained from the transport, magnetic and spectroscopic measurements. Here we report spectroscopic evidence of superconductivity pairing at 83 K in single-layer FeSe/STO films. By preparing high-quality single-layer FeSe/STO films, we observe for the first time strong superconductivity-induced Bogoliubov back-bending bands that extend to rather high binding energy ~100 meV by high-resolution angle-resolved photoemission measurements. The Bogoliubov back-bending band provides a new definitive benchmark of superconductivity pairing that is directly observed up to 83 K in the single-layer FeSe/STO films. Moreover, we find that the superconductivity pairing state can be further divided into two temperature regions of 64-83 K and below 64 K. We propose the 64-83 K region may be attributed to superconductivity fluctuation while the region below 64 K corresponds to the realization of long-range superconducting phase coherence. These results indicate that either Tc as high as 83 K is achievable in iron-based superconductors, or there is a pseudogap formation from superconductivity fluctuation in single-layer FeSe/STO films.read more
Citations
More filters
Book ChapterDOI
The Experimental Survey
TL;DR: The experimental survey was designed to examine the impact of information upon attitudes to the death penalty as mentioned in this paper, by examining attitudinal differences between groups, and reported the effect of information on death penalty attitudes, and on reasons for supporting and opposing the death penalties.
Journal Article
New Li-Ethylenediamine-Intercalated Superconductor Li
Journal ArticleDOI
Fluctuating Nature of Light-Enhanced d -Wave Superconductivity: A Time-Dependent Variational Non-Gaussian Exact Diagonalization Study
TL;DR: In this article, a new computational method was proposed to look at the mechanism underlying superconductivity in cuprates above their critical temperatures, which can be seen as a form of superconductance.
Journal ArticleDOI
Higher-order spin-hole correlations around a localized charge impurity
Yao Wang,Annabelle Bohrdt,Shuhan Ding,Shuhan Ding,Joannis Koepsell,Eugene Demler,Eugene Demler,Fabian Grusdt +7 more
TL;DR: In this article, the authors consider the case of a single dopant in the Mott insulating regime of the 2D Hubbard model and show that the dopant localization has a dramatic effect on its magnetic dressing.
References
More filters
Journal ArticleDOI
Superconductivity in the PbO-type structure α-FeSe
F. C. Hsu,J. Y. Luo,Kuo-Wei Yeh,Ta-Kun Chen,T. W. Huang,Phillip M. Wu,Yong-Chi Lee,Yi-Lin Huang,Yan-Yi Chu,Der-Chung Yan,Maw-Kuen Wu +10 more
TL;DR: The observation of superconductivity with zero-resistance transition temperature at 8 K in the PbO-type α-FeSe compound is reported, indicating that this compound has the same, perhaps simpler, planar crystal sublattice as the layered oxypnictides.
Journal ArticleDOI
The pseudogap in high-temperature superconductors: an experimental survey
Thomas Timusk,B. W. Statt +1 more
TL;DR: The pseudogap is seen in all high-temperature superconductors and there is general agreement on the temperature and doping range where it exists as discussed by the authors, and it is also becoming clear that the superconducting gap emerges from the normal state pseudogaps.
Journal ArticleDOI
Importance of phase fluctuations in superconductors with small superfluid density
V. J. Emery,Steven A. Kivelson +1 more
TL;DR: In this article, the phase of the order parameter is not important for determining the value of the transition temperature Tc and the change of many physical properties brought about by the transition, and the phase fluctuations, both classical and quantum, may have a significant influence on low-temperature properties.
Journal ArticleDOI
The dynamics of charge-density waves
TL;DR: In many materials with a highly anisotropic band structure, electron-phonon interactions lead to a novel type of ground state called the charge-density wave as mentioned in this paper, which can, even for small electric fields, carry current in a fashion originally envisioned by Frohlich.
Journal ArticleDOI
Interface-Induced High-Temperature Superconductivity in Single Unit-Cell FeSe Films on SrTiO3
Qingyan Wang,Qingyan Wang,Zhi Li,Wenhao Zhang,Zuocheng Zhang,Jinsong Zhang,Wei Li,Hao Ding,Yunbo Ou,Peng Deng,Kai Chang,Jing Wen,Can-Li Song,Ke He,Jin-Feng Jia,Shuai-Hua Ji,Yayu Wang,Lili Wang,Xi Chen,Xucun Ma,Qi-Kun Xue +20 more
TL;DR: In this paper, the authors reported high transition temperature superconductivity in one unitcell (UC) thick FeSe films grown on a Se-etched SrTiO3 (001) substrate by molecular beam epitaxy (MBE).