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Anomalous Landau levels and quantum oscillation in rotation-invariant insulators
| العنوان: | Anomalous Landau levels and quantum oscillation in rotation-invariant insulators |
|---|---|
| المؤلفون: | Fu, Jianlong, Weng, Chun Yu, Po, Hoi Chun |
| سنة النشر: | 2025 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | Landau levels in certain models are known to protrude into the zero-field energy gap. These are known as anomalous Landau levels (ALLs). We study whether ALLs can lead to in-gap quantum oscillation in the absence of a zero-field Fermi surface. Focusing on two-dimensional multi-band low-energy models of electrons with continuous rotation symmetry, we show that an effective-band description, akin to the semiclassical treatment of Landau level problems in metals, can be used to predict the Landau level spectrum, including possible ALLs. This description then predicts quantum oscillation for certain insulating models, which we demonstrate through numerical calculations. Comment: 10 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2501.16792 |
| رقم الانضمام: | edsarx.2501.16792 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |