5 papers
Orbital Magnetization of Interacting Electrons
Xi Chen, Zhi-Da Song
We derive an exact expression for the orbital magnetization of electrons with short-range interactions (such as density-density interactions) in terms of exact zero-frequency respo…
Spin-Valley Anderson Impurity for Moiré Systems: Fermi Liquid, Pairing, and Pseudogap
Yi-Jie Wang, Geng-Dong Zhou, Hyunsung Jung +3
Recent experiments support that the magic-angle graphene can be modeled by a periodic array of correlated quantum impurities, immersed in a Dirac sea. This work analytically tackle…
Bosonization Solution to Spin-Valley Kondo Problem: Finite-Size Spectrum and Renormalization Group Analysis
Yi-Jie Wang, Geng-Dong Zhou, Hyunsung Jung +3
Spin-valley Anderson impurities (SVAIM) with (anti-)Hund's splitting provide a natural explanation to the origin of pairing potential and pseudogap in the magic-angle graphene. In…
Dissipation-induced bound states as a two-level system
Hong Peng Zhang, Zhi Song
Potential wells are employed to constrain quantum particles into forming discrete energy levels, acting as artificial few-level systems. In contrast, an anti-parity-time ($\mathcal…
Probing fragile topology with a screw dislocation
Ying Wu, Zhi-Kang Lin, Yating Yang +3
Fragile topology, akin to twisted bilayer graphene and the exotic phases therein, is a notable topological class with intriguing properties. However, due to its unique nature and t…