13 papers
Quantum anomalous Hall effect in chiral semimetals
Peng-Yi Liu, Yu-Hao Wan, Qing-Feng Sun
The quantum anomalous Hall (QAH) effect is conventionally understood to exist only in Chern insulators, while a recent study has shown that ferromagnetic metals can also host the Q…
Robust quantized thermal conductance of Majorana floating edge bands in d-wave superconductors
Yanmiao Han, Yu-Hao Wan, Zhaoqin Cao +2
We propose and characterize a new class of Majorana boundary states, i.e., floating Majorana edge bands (FMEBs), which emerge in two-dimensional (2D) superconductors that break tim…
The emergence of net chirality in two-dimensional Dirac fermions system with altermagnetic mass
Peng-Yi Liu, Yu-Hao Wan, Qing-Feng Sun
In two-dimensional lattice systems, massless Dirac fermions undergo doubling, leading to the cancellation of net chirality. We demonstrate that the recently discovered altermagneti…
Helical Fermi Arc in Altermagnetic Weyl Semimetal
Yu-Hao Wan, Cheng-Ming Miao, Peng-Yi Liu +1
We investigate the topological properties of modified Dirac Hamiltonians with an altermagnetic mass term and reveal a novel mechanism for realizing altermagnetic Weyl semimetals. U…
Quantum Anomalous Hall Effect in Ferromagnetic Metals
Yu-Hao Wan, Peng-Yi Liu, Qing-Feng Sun
The quantum anomalous Hall (QAH) effect holds fundamental importance in topological physics and technological promise for electronics. It is generally believed that the QAH effect…
Interplay of Altermagnetic Order and Wilson Mass in the Dirac Equation: Helical Edge States without Time-Reversal Symmetry
Yu-Hao Wan, Peng-Yi Liu, Qing-Feng Sun
We investigate topological phases in three-dimensional topological insulator (3DTI) thin films interfaced with altermagnetic (AM) orders. Starting from a modified Dirac equation, w…