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Magnetic, charge, and bond order in the two-dimensional Su-Schrieffer-Heeger-Holstein model

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [5]
  1. University of California, Davis, CA (United States); University of Tennessee, Knoxville
  2. Flatiron Institute, New York, NY (United States); University of California, Davis, CA (United States)
  3. University of California, Davis, CA (United States)
  4. University of Tennessee, Knoxville, TN (United States)
  5. National University of Singapore (Singapore); Université Côte d'Azur, Nice (France)
+ Show Author Affiliations
Most nonperturbative numerical studies of electron-phonon interactions focus on model Hamiltonians where the electrons interact with a phonon branch via a single type of microscopic mechanism. Two commonly explored couplings in this context are the Holstein and Su-Schrieffer-Heeger (SSH) interactions, which describe phonons modulating the on-site energy and intersite electron hopping, respectively. Many materials, however, have multiple phonon branches that can each interact with electronic degrees of freedom in different ways. We present here a determinant quantum Monte Carlo study of the half-filled two-dimensional (bond) SSH-Holstein Hamiltonian, where electrons couple to different phonon branches via either the Holstein or SSH mechanism. As a result, we map the model's phase diagram and determine the nature of the transitions between charge-density wave, bond-order wave, and antiferromagnetic order.
Research Organization:
University of California, Davis, CA (United States); University of Tennessee, Knoxville, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0022311
OSTI ID:
2396276
Alternate ID(s):
OSTI ID: 2432277
OSTI ID: 2473952
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 4 Vol. 110; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (7)

FIG. 1(p. 2)figure FIG. 1
FIG. 2.(p. 3)figure FIG. 2.
FIG. 3(p. 3)figure FIG. 3
FIG. 4(p. 4)figure FIG. 4
FIG. 5(p. 4)figure FIG. 5
FIG. 6(p. 5)figure FIG. 6
FIG. 7(p. 5)figure FIG. 7

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Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Antiferromagnetism
Charge density waves
Holstein model
Metropolis algorithm
Monte Carlo methods
Quantum Monte Carlo
Su-Schrieffer-Heeger model