Pair-density-wave in the strong coupling limit of the Holstein-Hubbard model
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DOI: 10.1038/s41535-022-00426-w
Abstract: A pair-density-wave (PDW) is a superconducting state with an oscillating order parameter. A microscopic mechanism that can give rise to it has been long sought but has not yet been established by any controlled calculation.… read more here.
Keywords: density; hubbard model; density wave; pair density ... See more keywords
Metallicity in a Holstein-Hubbard Chain at Half Filling with Gaussian Anharmonicity
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DOI: 10.1038/s41598-017-03985-2
Abstract: The Holstein-Hubbard model with Gaussian phonon anharmonicity is studied in one-dimension at half filling using a variational method based on a series of canonical transformations. A fairly accurate phonon state is chosen to average the… read more here.
Keywords: half filling; anharmonicity; holstein hubbard; metallicity holstein ... See more keywords
Two-dimensional Holstein-Hubbard model: Critical temperature, Ising universality, and bipolaron liquid
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DOI: 10.1103/physrevb.98.085405
Abstract: Fundamental open questions about the two-dimensional Holstein model of electrons coupled to quantum phonons are addressed by continuous-time quantum Monte Carlo simulations. The critical temperature of the charge-density-wave transition is determined by a finite-size scaling… read more here.
Keywords: holstein hubbard; critical temperature; dimensional holstein; two dimensional ... See more keywords