9 papers
Optical conductivity signature of Van Hove singularity in altermagnetic topological systems
Fang Qin, Rui Chen, Xiao-Bin Qiang
We investigate the topological phases, joint density of states (JDOS), optical conductivities, and magneto-optical responses of a two-dimensional -wave altermagnet with spin-orb…
Anomalous thermoelectric and thermal Hall effects in irradiated altermagnets
Fang Qin, Xiao-Bin Qiang
We show that a -wave altermagnet can be transformed into a Chern insulator by irradiating it with elliptically polarized light from a high-frequency photon beam. We further expl…
Enhanced Anomalous Nernst Effect in the Ferromagnetic Kondo Lattice CeCo2As2
Shuyue Guan, Weian Guo, Pengyu Zheng +9
The anomalous Nernst effect (ANE), generating a voltage perpendicular to a temperature gradient due to magnetization, is closely linked to the Berry curvature (BC) near the Fermi e…
Probing quantum geometric nonlinear magnetization via second-harmonic magneto-optical Kerr effect
Xuan Qian, Xiao-Bin Qiang, Wenkai Zhu +5
Quantum geometry provides an intrinsic framework for characterizing the geometric structure of quantum states. It highlights its relevance to various aspects of fundamental physics…
Quantum Christoffel Nonlinear Magnetization
Xiao-Bin Qiang, Xiaoxiong Liu, Hai-Zhou Lu +1
The Christoffel symbol is an essential quantity in Einstein's general theory of relativity. We discover that an electric field can induce a nonlinear magnetization in quantum mater…
Quantum Geometric Origin of Orbital Magnetization
Xiao-Bin Qiang, Tianyu Liu, Hai-Zhou Lu +1
The exploration of the Riemannian structure of the Hilbert space has led to the concept of quantum geometry, comprising geometric quantities exemplified by Berry curvature and quan…