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Article
Materials Science, Multidisciplinary
A. Goetz et al.
Summary: The two-dimensional Su-Schrieffer-Heeger model with electron-phonon coupling is investigated using Langevin dynamics and auxiliary-field quantum Monte Carlo. The efficient method in the challenging adiabatic limit is argued based on an explicit determination of the density of zeros of the fermion determinant. Large-scale simulations establish a transition from a (pi, pi) valence bond solid to an antiferromagnet as the phonon frequency increases. The single-particle spectrum shows renormalization and suggests the presence of a gapped polaronic band, while the particle-hole channels show gapless modes associated with long-range bond and magnetic order.
Article
Materials Science, Multidisciplinary
Chao Zhang et al.
Summary: This study investigates polarons originating from phonon displacement modulated hopping and their potential as candidates for the bipolaron mechanism of high-temperature superconductivity. The study finds that, under certain coupling conditions, the bond model can be efficiently solved using sign-free Monte Carlo methods based on the path-integral formulation, and the presence of s-wave superconductivity is observed.
Article
Physics, Multidisciplinary
Bo Xing et al.
Summary: A new generation of quantum simulations has expanded our understanding of charge density wave phase transitions. The SSH Hamiltonian describes a scenario where phonons exist on bonds and modulate electron hopping. Results for the 2D SSH model show the presence of a bond ordered wave insulator at half filling, with a critical value of electron-phonon coupling required for its onset.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Xun Cai et al.
Summary: The study demonstrates that SSH phonons can induce AFM ordering in two-dimensional systems, and also reveals a direct quantum phase transition between VBS order and AFM phase. The phonon mechanism of AFM ordering is attributed to SSH phonons directly coupling to electron hopping processes.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Matthew R. Carbone et al.
Summary: This study compares polarons in the one-dimensional Bond-Peierls model and the breathing-mode Peierls problem, showing that polaron mass enhancement depends on the momentum dependence of phonons. The inclusion of phonon dispersion leads to a nondivergent polaron mass, with a possible transition to a non-zero-momentum ground state similar to the breathing-mode Peierls model.
Article
Materials Science, Multidisciplinary
Chao Zhang et al.
Summary: The study shows that PSSH polarons based on different types of displacement-modulated hopping exhibit distinct properties as the coupling strength increases, with one type exhibiting a diverging effective mass at the critical point and decreasing anisotropically with increasing coupling, while the other type keeps the ground-state momentum at zero and the effective mass monotonously increasing with coupling.
Article
Physics, Multidisciplinary
John Sous et al.
PHYSICAL REVIEW LETTERS
(2018)
Article
Physics, Multidisciplinary
D. J. J. Marchand et al.
PHYSICAL REVIEW LETTERS
(2010)
Article
Physics, Fluids & Plasmas
M. Boninsegni et al.
Article
Physics, Multidisciplinary
Evgeni Burovski et al.
NEW JOURNAL OF PHYSICS
(2006)
Article
Physics, Multidisciplinary
E Burovski et al.
PHYSICAL REVIEW LETTERS
(2006)
