Giant enhancement of anisotropy by electron-phonon interaction

Abstract

Anisotropic electron-phonon interaction is shown to lead to the anisotropic polaron effect. The resulting anisotropy of the polaron band is an exponential function of the electron-phonon coupling and might be as big as $10^3$. This also makes anisotropy very sensitive to small changes of coupling and implies wide variations of anisotropy among compounds of similar structure. The isotope effect on mass anisotropy is predicted. Polaron masses are obtained by an exact Quantum Monte Carlo method. Implications for high-temperature superconductors are briefly discussed.

5 pages, 4 figures

References in corpus (3)

• Polaron Problem by Diagrammatic Quantum Monte Carlo
• Mobile small polaron
• Continuous-Time Quantum Monte Carlo Algorithm for the Lattice Polaron

Cited by in corpus (12)

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• Evidence for novel polaronic Fermi-liquid in doped oxides
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• Two-particle bound states on a lattice
• Optimal interlayer hopping and high temperature Bose-Einstein condensation of local pairs in quasi 2D superconductors
• Effect of screening of the electron-phonon interaction on mass renormalization and optical conductivity of the Extended Holstein model polarons
• An approach for studying the influence of uniaxial strain (pressure) on the temperature of the Bose-Einstein condensation of intersite bipolarons: possible implementation for RBa${}_2$Cu${}_3$O${}_{7-\delta }$ cuprates
• Mass of a lattice polaron from extended Holstein model using Yukawa potential
• Periodically Driven Adiabatic Bipolarons
• Real-space d-wave superconductivity from weak attraction