Anomalous thermal Hall effect in the topological antiferromagnetic state

Abstract

The anomalous Hall effect (AHE), a Hall signal occurring without an external magnetic field, is one of the most significant phenomena. However, understanding the AHE mechanism has been challenging and largely restricted to ferromagnetic metals. Here, we investigate the recently discovered AHE in the chiral antiferromagnet Mn3Sn by measuring a thermal analog of the AHE, known as an anomalous thermal Hall effect (ATHE). The amplitude of the ATHE scales with the anomalous Hall conductivity of Mn3Sn over a wide temperature range, demonstrating that the AHE of Mn3Sn arises from a dissipationless intrinsic mechanism associated with the Berry curvature. Moreover, we find that the dissipationless AHE is significantly stabilized by shifting the Fermi level toward the magnetic Weyl points. Thus, in Mn3Sn, the Berry curvature emerging from the proposed magnetic Weyl fermion state is a key factor for the observed AHE and ATHE.

arXiv comment28 pages, 8 figures

References in corpus (22)

• Berry Phase Effects on Electronic Properties
• Anomalous Hall effect
• Anomalous Hall Effect and Magnetic Monopoles in Momentum-Space
• First Principles Calculation of Anomalous Hall Conductivity in Ferromagnetic bcc Fe
• Anomalous Hall effect in ferromagnetic semiconductors
• Anomalous Hall effect arising from noncollinear antiferromagnetism
• Large anomalous Nernst effect at room temperature in a chiral antiferromagnet
• Observation of the Magnon Hall Effect
• Universal Scaling Behavior of Anomalous Hall Effect and Anomalous Nernst Effect in Itinerant Ferromagnets
• Intrinsic vs. extrinsic anomalous Hall effect in ferromagnets
• Quantum transport theory of anomalous electric, thermoelectric, and thermal Hall effects in ferromagnets
• Anomalous Hall Effect in Weyl Metals
• Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn
• Cluster multipole theory for anomalous Hall effect in antiferromagnets
• Strong, anisotropic anomalous Hall effect and spin Hall effect in chiral antiferromagnetic compounds Mn${}_{3}X$ ($X$ = Ge, Sn, Ga, Ir, Rh and Pt)
• Large Anomalous Hall effect in a silicon-based magnetic semiconductor
• Quantum transport in three-dimensional Weyl electron system
• Spin-orbit strength driven crossover between intrinsic and extrinsic mechanisms of the anomalous Hall effect in epitaxial L1o FePd and FePt
• Emergence of nontrivial magnetic excitations in a spin liquid state of kagome volborthite
• Thermal Hall effect in a phonon-glass Ba${}_3$CuSb${}_2$O${}_9$
• Emerging chiral edge states from the confinement of a magnetic Weyl semimetal in Co${}_3$Sn${}_2$S${}_2$
• Ab Initio Theory of Scattering-Independent Anomalous Hall Effect

Cited by in corpus (6)

• Room-Temperature Terahertz Anomalous Hall Effect in Weyl Antiferromagnet Mn${}_3$Sn Thin Films
• Anomalous transverse response of Co${}_2$MnGa and universality of the room-temperature ${\alpha }_{ij}^A/{\sigma }_{ij}^A$ ratio across topological magnets
• Field-linear anomalous Hall effect and Berry curvature induced by spin chirality in the kagome antiferromagnet Mn3Sn
• Anomalous photon thermal Hall effect
• Planar Hall effect caused by the memory of antiferromagnetic domain walls in Mn${}_3$Ge
• The free energy of twisting spins in Mn${}_3$Sn