Publication Date
8-20-2020
Department
Ames Laboratory; Physics and Astronomy
Campus Units
Ames Laboratory, Physics and Astronomy
OSTI ID+
1650577
Report Number
IS-J 10287
DOI
10.1002/andp.202000248
Journal Title
Annalen der Physik
Volume Number
532
Issue Number
10
First Page
2000248
Abstract
Iron‐based superconductors are well‐known for their intriguing phase diagrams, which manifest a complex interplay of electronic, magnetic, and structural degrees of freedom. Among the phase transitions observed are superconducting, magnetic, and several types of structural transitions, including a tetragonal‐to‐orthorhombic and a collapsed‐tetragonal transition. In particular, the widely observed tetragonal‐to‐orthorhombic transition is believed to be a result of an electronic order that is coupled to the crystalline lattice and is, thus, referred to as nematic transition. Nematicity is therefore a prominent feature of these materials, which signals the importance of the coupling of electronic and lattice properties. Correspondingly, these systems are particularly susceptible to tuning via pressure (hydrostatic, uniaxial, or some combination). Efforts to probe the phase diagrams of pressure‐tuned iron‐based superconductors are reviewed with a strong focus on recent insights into the phase diagrams of several members of this material class under hydrostatic pressure. These studies on FeSe, Ba(Fe 1−𝑥 Cox)2As2, Ca(Fe 1−𝑥 Cox)2As2, and CaK(Fe 1−𝑥 Nix)4As4 are, to a significant extent, made possible by advances of what measurements can be adapted to their use under differing pressure environments. The potential impact of these tools for the study of the wider class of strongly correlated electron systems is pointed out.
DOE Contract Number(s)
AC02‐07CH11358; GBMF4411
Language
en
Department of Energy Subject Categories
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Publisher
Iowa State University Digital Repository, Ames IA (United States)
