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Title: Phase competition in a one-dimensional three-orbital Hubbard-Holstein model

Here, we study the interplay between the electron-phonon (e-ph) and on-site electron-electron (e-e) interactions in a three-orbital Hubbard-Holstein model on an extended one-dimensional lattice using determinant quantum Monte Carlo. For weak e-e and e-ph interactions, we observe a competition between an orbital-selective Mott phase (OSMP) and a (multicomponent) charge-density-wave (CDW) insulating phase, with an intermediate metallic phase located between them. Additionally, for large e-e and e-ph couplings, the OSMP and CDW phases persist, while the metallic phase develops short-range orbital correlations and becomes insulating when both the e-e and e-ph interactions are large but comparable. Many of our conclusions are in line with those drawn from a prior dynamical mean-field theory study of the two-orbital Hubbard-Holstein model [Phys. Rev. B 95, 121112(R) (2017)] in infinite dimension, suggesting that the competition between the e-ph and e-e interactions in multiorbital Hubbard-Holstein models leads to rich physics, regardless of the dimension of the system.
Authors:
 [1] ;  [2] ; ORCiD logo [3] ;  [4]
  1. Univ. of Tennessee, Knoxville, TN (United States). Department of Physics and Astronomy
  2. Virginia Tech, Blacksburg, VA (United States). Department of Physics
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science (CNMS) and Computational Sciences and Engineering Division
  4. Univ. of Tennessee, Knoxville, TN (United States). Department of Physics and Astronomy and Joint Institute of Advanced Materials
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1474640
Alternate Identifier(s):
OSTI ID: 1436823

Liu, Shaozhi, Tang, Yanfei, Maier, Thomas A., and Johnston, Steven. Phase competition in a one-dimensional three-orbital Hubbard-Holstein model. United States: N. p., Web. doi:10.1103/PhysRevB.97.195116.
Liu, Shaozhi, Tang, Yanfei, Maier, Thomas A., & Johnston, Steven. Phase competition in a one-dimensional three-orbital Hubbard-Holstein model. United States. doi:10.1103/PhysRevB.97.195116.
Liu, Shaozhi, Tang, Yanfei, Maier, Thomas A., and Johnston, Steven. 2018. "Phase competition in a one-dimensional three-orbital Hubbard-Holstein model". United States. doi:10.1103/PhysRevB.97.195116.
@article{osti_1474640,
title = {Phase competition in a one-dimensional three-orbital Hubbard-Holstein model},
author = {Liu, Shaozhi and Tang, Yanfei and Maier, Thomas A. and Johnston, Steven},
abstractNote = {Here, we study the interplay between the electron-phonon (e-ph) and on-site electron-electron (e-e) interactions in a three-orbital Hubbard-Holstein model on an extended one-dimensional lattice using determinant quantum Monte Carlo. For weak e-e and e-ph interactions, we observe a competition between an orbital-selective Mott phase (OSMP) and a (multicomponent) charge-density-wave (CDW) insulating phase, with an intermediate metallic phase located between them. Additionally, for large e-e and e-ph couplings, the OSMP and CDW phases persist, while the metallic phase develops short-range orbital correlations and becomes insulating when both the e-e and e-ph interactions are large but comparable. Many of our conclusions are in line with those drawn from a prior dynamical mean-field theory study of the two-orbital Hubbard-Holstein model [Phys. Rev. B 95, 121112(R) (2017)] in infinite dimension, suggesting that the competition between the e-ph and e-e interactions in multiorbital Hubbard-Holstein models leads to rich physics, regardless of the dimension of the system.},
doi = {10.1103/PhysRevB.97.195116},
journal = {Physical Review B},
number = 19,
volume = 97,
place = {United States},
year = {2018},
month = {5}
}