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Title: Magnetism and superconductivity in Fe1+yTe1-xSex

Journal Article · · Journal of Physics. Condensed Matter
ORCiD logo [1];  [2];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

Neutron scattering has played a significant role in characterizing magnetic and structural correlations in Fe$$_{1+y}$$Te$$_{1-x}$$Se$$_x$$ and their connections with superconductivity. Here we review several key aspects of the physics of iron chalcogenide superconductors where neutron studies played a key role. These topics include the phase diagram of Fe$$_{1+y}$$Te$$_{1-x}$$Se$$_{x}$$, where the doping-dependence of structural transitions can be understood from a mapping to the anisotropic random field Ising model. We then discuss orbital-selective Mott physics in the Fe chalcogenide series, where temperature-dependent magnetism in the parent material provided one of the earliest cases for orbital-selective correlation effects in a Hund's metal. Finally, we elaborate on the character of local magnetic correlations revealed by neutron scattering, its dependence on temperature and composition, and the connections to nematicity and superconductivity.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1558251
Report Number(s):
BNL-212008-2019-JAAM
Journal Information:
Journal of Physics. Condensed Matter, Vol. 32, Issue 37; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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