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Singular angular magnetoresistance in a magnetic nodal semimetal

Suzuki, T ; Savary, L ; Liu, J-P ; Lynn, J W ; Balents, L ; Checkelsky, J G

Science (American Association for the Advancement of Science), 2019-07, Vol.365 (6451), p.377-381 [Periódico revisado por pares]

United States: The American Association for the Advancement of Science

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Título:
Singular angular magnetoresistance in a magnetic nodal semimetal
Autor: Suzuki, T ; Savary, L ; Liu, J-P ; Lynn, J W ; Balents, L ; Checkelsky, J G
Assuntos: Aluminum ; Axes (reference lines) ; Broken symmetry ; Cerium ; Condensed Matter ; Domain walls ; Electronic structure ; Fermi surfaces ; Germanium ; Magnetic domains ; Magnetic fields ; Magnetic materials ; Magnetism ; Magnetoresistance ; Magnetoresistivity ; Mapping ; Material properties ; Momentum ; Physics ; Sensitivity ; Spikes ; Strongly Correlated Electrons ; Symmetry ; Transport properties
É parte de: Science (American Association for the Advancement of Science), 2019-07, Vol.365 (6451), p.377-381
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Author contributions: T.S. synthesized the materials and performed the electrical and thermodynamic measurements. L.S. and J.-P.L. performed theoretical calculations. T.S. and J.W.L. performed neutron scattering experiments. All authors contributed to writing the manuscript. L.B. and J.G.C. supervised the project.
Descrição: Transport coefficients of correlated electron systems are often useful for mapping hidden phases with distinct symmetries. Here we report a transport signature of spontaneous symmetry breaking in the magnetic Weyl semimetal cerium-aluminum-germanium (CeAlGe) system in the form of singular angular magnetoresistance (SAMR). This angular response exceeding 1000% per radian is confined along the high-symmetry axes with a full width at half maximum reaching less than 1° and is tunable via isoelectronic partial substitution of silicon for germanium. The SAMR phenomena is explained theoretically as a consequence of controllable high-resistance domain walls, arising from the breaking of magnetic point group symmetry strongly coupled to a nearly nodal electronic structure. This study indicates ingredients for engineering magnetic materials with high angular sensitivity by lattice and site symmetries.
Editor: United States: The American Association for the Advancement of Science
Idioma: Inglês

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Singular angular magnetoresistance in a magnetic nodal semimetal

Suzuki, T ; Savary, L ; Liu, J-P ; Lynn, J W ; Balents, L ; Checkelsky, J G

United States: The American Association for the Advancement of Science

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