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arXiv · 2601.09687

Disorder-induced strong-field strong-localization in 2D systems

Yi Huang·Sankar Das Sarma
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Abstract

A recent STM experiment in 2D bilayer graphene [Y.-C. Tsui, et al., Nature 628, 287 (2024)], under a strong perpendicular magnetic field, has made a direct observation of the existence of three distinct filling-factor-dependent quantum phases in the lowest Landau level: the incompressible fractional quantum Hall liquid, a crystalline compressible hexagonal Wigner crystal with long-range order and rotational symmetry-breaking, and a random localized solid phase with no spatial order. We argue that the spatially random localized phase at low filling is the recently proposed disorder-dominated strongly localized amorphous "Anderson solid" phase [A. Babber, et al., arXiv:2601.03521], which appears generically at a sample-dependent filling factor.

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Yi Huang, Sankar Das Sarma. 2026-01-14. Disorder-induced strong-field strong-localization in 2D systems. https://doi.org/10.1103/7dq6-dh9z

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