Charge density wave and superconductivity in the disordered Holstein model

B. Xiao; N. C. Costa; E. Khatami; G. G. Batrouni; R. T. Scalettar

doi:10.1103/PhysRevB.103.L060501

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Charge density wave and superconductivity in the disordered Holstein model

B. Xiao, N. C. Costa, E. Khatami, G. G. Batrouni, R. T. Scalettar

DOI 10.1103/PhysRevB.103.L060501 · Physical Review B

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Abstract

The interplay between electron-electron correlations and disorder has been a central theme of condensed matter physics over the past several decades, with particular interest in the possibility that interactions might cause delocalization of an Anderson insulator into a metallic state, and the disrupting effects of randomness on magnetic order and the Mott phase. Here we extend this physics to explore electron-phonon interactions and show, via exact quantum Monte Carlo simulations, that the suppression of the charge density wave correlations in the half-filled Holstein model by disorder can stabilize a superconducting phase. Our simulations thus capture qualitatively the suppression of charge ordered phases and emergent superconductivity recently seen experimentally.