Nematic Correlation Length in Iron-Based Superconductors Probed by Inelastic X-Ray Scattering

被引：12

作者：

Merritt, A. M. ^{[1
]}

Weber, F. ^{[2
,3
]}

Castellan, J-P ^{[2
,4
]}

Wolf, Th ^{[2
]}

Ishikawa, D. ^{[5
]}

Said, A. H. ^{[6
]}

Alatas, A. ^{[6
]}

Fernandes, R. M. ^{[7
]}

Baron, A. Q. R. ^{[5
]}

Reznik, D. ^{[1
,8
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Karlsruhe Inst Technol, Inst Solid State Phys, D-76021 Karlsruhe, Germany

[3] Karlsruhe Inst Technol, Inst Quantum Mat & Technol, D-76021 Karlsruhe, Germany

[4] CEA Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[5] RIKEN, Mat Dynam Lab, RIKEN SPring 8 Ctr, Sayo Ku, 1-1-1 Kouto, Mikazuki, Hyogo 6795148, Japan

[6] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[7] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[8] Univ Colorado, Ctr Expt Quantum Mat, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 124卷 / 15期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevLett.124.157001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nematicity is ubiquitous in electronic phases of high-T-c superconductors, particularly in the Fe-based systems. We used inelastic x-ray scattering to extract the temperature-dependent nematic correlation length. from the anomalous softening of acoustic phonon modes in FeSe, underdoped Ba(Fe0.97Co0.03)(2)As-2, and optimally doped Ba(Fe0.94Co0.06)(2)As-2. In all cases, we find that. is well described by a power law (T - T-0)(-1/2) extending over a wide temperature range. Combined with the previously reported Curie-Weiss behavior of the nematic susceptibility, these results point to the mean-field character of the nematic transition, which we attribute to a sizable nematoelastic coupling that is likely detrimental to superconductivity.

引用

页数：6

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