Temperature-dependent and magnetism-controlled Fermi surface changes in magnetic Weyl semimetals
Nan Zhang, Xianyong Ding, Fangyang Zhan, Houpu Li, Hongyu Li, Kaixin Tang, Yingcai Qian, Senyang Pan, Xiaoliang Xiao, Jinglei Zhang, Rui Wang, Ziji Xiang, Xianhui Chen
Abstract
Quantum oscillation measurements reveal that in magnetic Weyl semimetals NdAlSi and CeAlSi${}_{0.8}$Ge${}_{0.2}$, the areas of extremal orbits on Fermi surfaces change remarkably with varying temperature; such changes depend on the local spin configurations and magnetic-field directions. The temperature dependence of Fermi surfaces is demonstrated to be a result of the exchange coupling between the localized 4$f$ electrons and the itinerant 5$d$ electrons.
Topics & Concepts
Condensed matter physicsMagnetismQuantum oscillationsFermi surfacePhysicsElectronMagnetic fieldSpin (aerodynamics)SemimetalCoupling (piping)Fermi Gamma-ray Space TelescopeFermi levelOscillation (cell signaling)ChemistryQuantum mechanicsMaterials scienceSuperconductivityBand gapBiochemistryThermodynamicsMetallurgyTopological Materials and PhenomenaCold Atom Physics and Bose-Einstein CondensatesRare-earth and actinide compounds