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Title: Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions

Abstract

We report that recent studies of pairing and charge order in materials such as FeSe, SrTiO3, and 2H-NbSe2 have suggested that momentum dependence of the electron-phonon coupling plays an important role in their properties. Initial attempts to study Hamiltonians which either do not include or else truncate the range of Coulomb repulsion have noted that the resulting spatial nonlocality of the electron-phonon interaction leads to a dominant tendency to phase separation. Here we present quantum Monte Carlo results for such models in which we incorporate both on-site and intersite electron-electron interactions. We show that these can stabilize phases in which the density is homogeneous and determine the associated phase boundaries. As a consequence, the physics of momentum dependent electron-phonon coupling can be determined outside of the trivial phase separated regime.

Authors:
 [1];  [2];  [3];  [1]
  1. Univ. of California, Davis, CA (United States)
  2. Université Côte d'Azur, Nice (France). Centre National de la Recherche Scientifique, INPHYNI
  3. Université Côte d'Azur, Nice (France). Centre National de la Recherche Scientifique, INPHYNI; MajuLab (Singapore). Centre National de la Recherche Scientifique–UCA-SU-NUS-NTU International Joint Research Unit; National Univ. of Singapore (Singapore); Beijing Computational Science Research Center (China)
Publication Date:
Research Org.:
Univ. of California, Davis, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Research Agency
OSTI Identifier:
1597046
Alternate Identifier(s):
OSTI ID: 1515597
Grant/Contract Number:  
SC0014671; ANR-15-IDEX-01
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 20; 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; Antiferromagnetism; Change order; Dynamics of phase separation; Phase diagrams; Phase transitions by order; Peierls transition; Lattice models in condensed matter; Quantum Monte Carlo

Citation Formats

Xiao, Bo, Hébert, F., Batrouni, G., and Scalettar, R. T. Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.205145.
Xiao, Bo, Hébert, F., Batrouni, G., & Scalettar, R. T. Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions. United States. https://doi.org/10.1103/PhysRevB.99.205145
Xiao, Bo, Hébert, F., Batrouni, G., and Scalettar, R. T. Fri . "Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions". United States. https://doi.org/10.1103/PhysRevB.99.205145. https://www.osti.gov/servlets/purl/1597046.
@article{osti_1597046,
title = {Competition between phase separation and spin density wave or charge density wave order: Role of long-range interactions},
author = {Xiao, Bo and Hébert, F. and Batrouni, G. and Scalettar, R. T.},
abstractNote = {We report that recent studies of pairing and charge order in materials such as FeSe, SrTiO3, and 2H-NbSe2 have suggested that momentum dependence of the electron-phonon coupling plays an important role in their properties. Initial attempts to study Hamiltonians which either do not include or else truncate the range of Coulomb repulsion have noted that the resulting spatial nonlocality of the electron-phonon interaction leads to a dominant tendency to phase separation. Here we present quantum Monte Carlo results for such models in which we incorporate both on-site and intersite electron-electron interactions. We show that these can stabilize phases in which the density is homogeneous and determine the associated phase boundaries. As a consequence, the physics of momentum dependent electron-phonon coupling can be determined outside of the trivial phase separated regime.},
doi = {10.1103/PhysRevB.99.205145},
journal = {Physical Review B},
number = 20,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}

Journal Article:

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Cited by: 1 work
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