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DOE OSTI · 2004646

One-dimensional Holstein model revisited

Zhao, Sijia·Han, Zhaoyu·Kivelson, Steven A.·Esterlis, Ilya
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Abstract

Here, we analyze the global ground-state (quantum) phase diagram of the one-dimensional spinful Holstein model at half filling as a function of the strength of the electron-phonon coupling (represented by the strength of the phonon-induced attraction, U) and the phonon frequency ω 0 . In addition to reanalyzing the various asymptotic regimes, we carry out density-matrix renormalization group simulations to correct previous inferences concerning the antiadiabatic (large ω 0 ) and strong-coupling (large U) regimes. There are two distinct phases—a fully gapped commensurate charge-density-wave phase and a spin-gapped Luther-Emery phase with a gapless charge mode—separated by a phase boundary, with a shape that reflects different microscopic physics in the weak- and strong-coupling limits.

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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYnumerical techniquesphase diagramsstrongly correlated systems

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Zhao, Sijia, Han, Zhaoyu, Kivelson, Steven A., Esterlis, Ilya. 2023-02-21. One-dimensional Holstein model revisited. https://doi.org/10.1103/physrevb.107.075142

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