Roller Coaster in a Flatland: Magnetoresistivity in Eu-Intercalated Graphite

Novel phenomena in magnetically intercalated graphite have been the subject of much research, pioneered and promoted by M. S. and G. Dresselhaus and many others in the 1980s. Among the most enigmatic findings of that era was the dramatic, roller-coaster-like behavior of the magnetoresistivity in aEu...

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Published inPhysical review. X Vol. 12; no. 2; p. 021010
Main Authors Chernyshev, A. L., Starykh, O. A.
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 14.04.2022
American Physical Society (APS)
Subjects
Antiferromagnetism
antiferromagnets
Boltzmann theory
Condensed matter physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Conduction electrons
Configurations
electrical conductivity
Electrical resistivity
Electron spin
Electron transport
Europium
exchange interaction
Excitation
fermions
Frustrated magnetism
Graphene
Graphite
Heisenberg model
Holstein-Primakoff method
lattice models in condensed matter
Magnetic fields
Magnetic moments
magnetic phase transitions
Magnetism
Magnetoresistivity
magnetotransport
Magnets
Magnons
Materials science
noncollinear magnets
Physical properties
Roller coasters
Scattering
spin excitations
spin lattice models
spin liquid
strongly correlated systems
Superconductivity
transport phenomena
Two dimensional materials
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Summary:Novel phenomena in magnetically intercalated graphite have been the subject of much research, pioneered and promoted by M. S. and G. Dresselhaus and many others in the 1980s. Among the most enigmatic findings of that era was the dramatic, roller-coaster-like behavior of the magnetoresistivity in aEuC6compound, in which magneticEu2+ions form a triangular lattice that is commensurate to graphite honeycomb planes. In this study, we provide a long-awaited microscopic explanation of this behavior, demonstrating that the resistivity ofEuC6is dominated by spin excitations in Eu planes and their highly nontrivial evolution with the magnetic field. Together with our theoretical analysis, the present study showcases the power of the synthetic 2D materials as a source of potentially significant insights into the nature of exotic spin excitations.
Bibliography:ObjectType-Article-1
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content type line 14
SC0021221
USDOE Office of Science (SC), Basic Energy Sciences (BES)
ISSN:2160-3308
2160-3308
DOI:10.1103/PhysRevX.12.021010