Directional Localization from a Magnetic Field in Moiré Systems.
Phys Rev Lett
; 132(24): 246402, 2024 Jun 14.
Article
em En
| MEDLINE
| ID: mdl-38949360
ABSTRACT
Moiré materials provide a highly tunable platform in which novel electronic phenomena can emerge. We study strained moiré materials in a uniform magnetic field and predict highly anisotropic electrical conductivity that switches easy axis as magnetic field or strain is varied. The dramatic anisotropy reflects one-dimensional localization (directional localization) of the electron wave functions along a crystal axis due to quantum interference effects. This can be understood in an effective one-dimensional quasiperiodic Aubry-André-Harper-like model, or in a complementary semiclassical picture. This phenomenon should be observable in strained moiré materials at realistic fields and low strain disorder, as well as unstrained systems with anisotropic Fermi surfaces.
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MEDLINE
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En
Ano de publicação:
2024
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Article