Temperature-Dependent and Magnetism-Controlled Fermi Surface Changes in Magnetic Weyl Semimetals

Abstract

The coupling between band structure and magnetism can lead to intricate Fermi surface modifications. Here we report on the comprehensive study of the Shubnikov-de Haas (SdH) effect in two rare-earth-based magnetic Weyl semimetals, NdAlSi and CeAlSi${}_{0.8}$Ge${}_{0.2}$. The results show that the temperature evolution of topologically nontrivial Fermi surfaces strongly depends on magnetic configurations. In NdAlSi, the SdH frequencies vary with temperature in both the paramagnetic state and the magnetically ordered state with a chiral spin texture, but become temperature independent in the high-field fully polarized state. In CeAlSi${}_{0.8}$Ge${}_{0.2}$, SdH frequencies are temperature-dependent only in the ferromagnetic state with magnetic fields applied along the $c$ axis. First-principles calculations suggest that the notable temperature and magnetic-configuration dependence of Fermi surface morphology can be attributed to strong exchange coupling between the conduction electrons and local magnetic moments.

arXiv comment8 pages, 5 figures

References in corpus (22)

• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Maximally localized Wannier functions: Theory and applications
• Effective Demagnetization Factors of Diamagnetic Samples of Various Shapes
• Theoretical prediction of magnetic and noncentrosymmetric Weyl fermion semimetal states in the R-Al-X family of compounds (R=rare earth, Al=aluminium, X=Si, Ge)
• Anisotropic exchange interaction of localized conduction-band electrons in semiconductor structures
• A magnetic topological semimetal Sr1-yMn1-zSb2 (y, z< 0.1)
• RKKY interaction of magnetic impurities in Dirac and Weyl semimetals
• Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields
• A new noncollinear ferromagnetic Weyl semimetal with anisotropic anomalous Hall effect
• Magnetic semimetals and quantized anomalous Hall effect in EuB6
• Nonsaturating magnetoresistance, anomalous Hall effect, and magnetic quantum oscillations in ferromagnetic semimetal PrAlSi
• RKKY interaction in three-dimensional electron gases with linear spin-orbit coupling
• Evidence for a magnetic-field induced ideal type-II Weyl state in antiferromagnetic topological insulator Mn(Bi1-xSbx)2Te4
• Magnetic-field induced band-structure change in CeBiPt
• Multiple Weyl fermions in the noncentrosymmetric semimetal LaAlSi
• Impact of antiferromagnetic order on Landau level splitting of quasi-two-dimensional Dirac fermions in EuMnBi${}_2$
• Mapping Domain Wall Topology in the Magnetic Weyl Semimetal CeAlSi
• The dynamics of local magnetic moments induced by itinerant Weyl electrons
• Anomalous quantum oscillations and evidence for a non-trivial Berry phase in SmSb
• Quantum Oscillations in the Field-induced Ferromagnetic State of MnBi${}_{2-x}$Sb${}_x$Te${}_4$
• Magnetic tuning of band topology evidenced by exotic quantum oscillations in the Dirac semimetal EuMnSb${}_2$
• New Type of Quantum Oscillations Stemmed From the Strong Weyl Fermions - 4f Electrons Exchange Interaction

Cited by in corpus (7)

• Anomalous Hall effect with plateaus observed in a magnetic Weyl semimetal NdAlGe at low temperatures
• Abnormally enhanced Hall Lorenz number in the magnetic Weyl semimetal NdAlSi
• Five-dimensional Floquet topological semimetals with emergent Yang monopoles and linked Weyl surfaces
• Giant anomalous Hall conductivity in frustrated magnet EuCo2Al9
• Mapping the three-dimensional fermiology of the triangular lattice magnet EuAg${}_4$Sb${}_2$
• Significant Chiral Magnetotransport Magnified by Multiple Weyl Nodes
• Large circular photogalvanic effect in the noncentrosymmetric magnetic Weyl semimetal CeAlSi