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Title: Intertwined spin-orbital coupled orders in the iron-based superconductors

Abstract

The underdoped phase diagram of the iron-based superconductors exemplifies the complexity common to many correlated materials. Indeed, multiple ordered states that break different symmetries but display comparable transition temperatures are present. Here we argue that such a complexity can be understood within a simple unifying framework. This framework, built to respect the symmetries of the nonsymmorphic space group of the FeAs/Se layer, consists of primary magnetically ordered states and their vestigial phases that intertwine spin and orbital degrees of freedom. All vestigial phases have Ising-like and zero wave-vector order parameters, described in terms of composite spin order and exotic orbital-order patterns such as spin-orbital loop currents, staggered atomic spin-orbit coupling, and emergent Rashba- and Dresselhaus-type spin-orbit interactions. Moreover, they host unusual phenomena, such as the electronematic effect, by which electric fields act as transverse fields to the nematic order parameter, and the ferro-Néel effect, by which a uniform magnetic field induces Néel order. Here, we discuss the experimental implications of our findings to iron-based superconductors and possible extensions to other correlated compounds with similar space groups.

Authors:
ORCiD logo [1];  [2];  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States); Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1611764
Alternate Identifier(s):
OSTI ID: 1546437
Grant/Contract Number:  
SC0012336
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 1; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials Science; Physics; Antiferromagnetism; Charge density waves; Exotic phases of matter; Magnetic anisotropy; Quantum criticality; Spin density waves; Spin-orbit coupling; Iron-based superconductors; Inversion symmetry

Citation Formats

Christensen, Morten H., Kang, Jian, and Fernandes, Rafael M. Intertwined spin-orbital coupled orders in the iron-based superconductors. United States: N. p., 2019. Web. doi:10.1103/physrevb.100.014512.
Christensen, Morten H., Kang, Jian, & Fernandes, Rafael M. Intertwined spin-orbital coupled orders in the iron-based superconductors. United States. https://doi.org/10.1103/physrevb.100.014512
Christensen, Morten H., Kang, Jian, and Fernandes, Rafael M. 2019. "Intertwined spin-orbital coupled orders in the iron-based superconductors". United States. https://doi.org/10.1103/physrevb.100.014512. https://www.osti.gov/servlets/purl/1611764.
@article{osti_1611764,
title = {Intertwined spin-orbital coupled orders in the iron-based superconductors},
author = {Christensen, Morten H. and Kang, Jian and Fernandes, Rafael M.},
abstractNote = {The underdoped phase diagram of the iron-based superconductors exemplifies the complexity common to many correlated materials. Indeed, multiple ordered states that break different symmetries but display comparable transition temperatures are present. Here we argue that such a complexity can be understood within a simple unifying framework. This framework, built to respect the symmetries of the nonsymmorphic space group of the FeAs/Se layer, consists of primary magnetically ordered states and their vestigial phases that intertwine spin and orbital degrees of freedom. All vestigial phases have Ising-like and zero wave-vector order parameters, described in terms of composite spin order and exotic orbital-order patterns such as spin-orbital loop currents, staggered atomic spin-orbit coupling, and emergent Rashba- and Dresselhaus-type spin-orbit interactions. Moreover, they host unusual phenomena, such as the electronematic effect, by which electric fields act as transverse fields to the nematic order parameter, and the ferro-Néel effect, by which a uniform magnetic field induces Néel order. Here, we discuss the experimental implications of our findings to iron-based superconductors and possible extensions to other correlated compounds with similar space groups.},
doi = {10.1103/physrevb.100.014512},
url = {https://www.osti.gov/biblio/1611764}, journal = {Physical Review. B},
issn = {2469-9950},
number = 1,
volume = 100,
place = {United States},
year = {Mon Jul 15 00:00:00 EDT 2019},
month = {Mon Jul 15 00:00:00 EDT 2019}
}

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Cited by: 10 works
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Works referenced in this record:

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Works referencing / citing this record:

Orbital transmutation and the electronic spectrum of FeSe in the nematic phase
text, January 2019