Mott glass from localization and confinement

Yang-Zhi Chou; Rahul M. Nandkishore; Leo Radzihovsky

doi:10.1103/physrevb.97.184205

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arXiv · 1803.04426

Mott glass from localization and confinement

Yang-Zhi Chou·Rahul M. Nandkishore·Leo Radzihovsky

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Abstract

We study a system of fermions in one spatial dimension with linearly confining interactions and short-range disorder. We focus on the zero temperature properties of this system, which we characterize using bosonization and the Gaussian variational method. We compute the static compressibility and ac conductivity, and thereby demonstrate that the system is incompressible, but exhibits gapless optical conductivity. This corresponds to a "Mott-glass" state, distinct from an Anderson and a fully gapped Mott insulator, arising due to the interplay of disorder and charge confinement. We argue that this "Mott-glass" phenomenology should persist to non-zero temperatures.

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Yang-Zhi Chou, Rahul M. Nandkishore, Leo Radzihovsky. 2018-05-21. Mott glass from localization and confinement. https://doi.org/10.1103/physrevb.97.184205

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