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Title: Possible bicollinear nematic state with monoclinic lattice distortions in iron telluride compounds

Abstract

Here, iron telluride (FeTe) is known to display bicollinear magnetic order at low temperatures together with a monoclinic lattice distortion. Because the bicollinear order can involve two different wave vectors (π/2,π/2) and (π/2,–π/2), symmetry considerations allow for the possible stabilization of a nematic state with short-range bicollinear order coupled to monoclinic lattice distortions at a T S higher than the temperature T N where long-range bicollinear order fully develops. As a concrete example, the three-orbital spin-fermion model for iron telluride is studied with an additional coupling ˜λ 12 between the monoclinic lattice strain and an orbital-nematic order parameter with B 2g symmetry. Monte Carlo simulations show that with increasing ˜λ 12 the first-order transition characteristic of FeTe splits and bicollinear nematicity is stabilized in a (narrow) temperature range. In this new regime, the lattice is monoclinically distorted and short-range spin and orbital order breaks rotational invariance. A discussion of possible realizations of this exotic state is provided.

Authors:
 [1];  [1];  [1];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1399225
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 3; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; chalcogenides; bicollinear antiferromagnetism; nematicity; orbital-lattice coupling

Citation Formats

Bishop, Christopher B., Herbrych, Jacek W., Dagotto, Elbio R., and Moreo, Adriana. Possible bicollinear nematic state with monoclinic lattice distortions in iron telluride compounds. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.035144.
Bishop, Christopher B., Herbrych, Jacek W., Dagotto, Elbio R., & Moreo, Adriana. Possible bicollinear nematic state with monoclinic lattice distortions in iron telluride compounds. United States. doi:10.1103/PhysRevB.96.035144.
Bishop, Christopher B., Herbrych, Jacek W., Dagotto, Elbio R., and Moreo, Adriana. Sat . "Possible bicollinear nematic state with monoclinic lattice distortions in iron telluride compounds". United States. doi:10.1103/PhysRevB.96.035144.
@article{osti_1399225,
title = {Possible bicollinear nematic state with monoclinic lattice distortions in iron telluride compounds},
author = {Bishop, Christopher B. and Herbrych, Jacek W. and Dagotto, Elbio R. and Moreo, Adriana},
abstractNote = {Here, iron telluride (FeTe) is known to display bicollinear magnetic order at low temperatures together with a monoclinic lattice distortion. Because the bicollinear order can involve two different wave vectors (π/2,π/2) and (π/2,–π/2), symmetry considerations allow for the possible stabilization of a nematic state with short-range bicollinear order coupled to monoclinic lattice distortions at a TS higher than the temperature TN where long-range bicollinear order fully develops. As a concrete example, the three-orbital spin-fermion model for iron telluride is studied with an additional coupling ˜λ12 between the monoclinic lattice strain and an orbital-nematic order parameter with B2g symmetry. Monte Carlo simulations show that with increasing ˜λ12 the first-order transition characteristic of FeTe splits and bicollinear nematicity is stabilized in a (narrow) temperature range. In this new regime, the lattice is monoclinically distorted and short-range spin and orbital order breaks rotational invariance. A discussion of possible realizations of this exotic state is provided.},
doi = {10.1103/PhysRevB.96.035144},
journal = {Physical Review B},
issn = {2469-9950},
number = 3,
volume = 96,
place = {United States},
year = {2017},
month = {7}
}