Work

Observation of chiral phonons with giant magnetic moments in a topological crystalline insulator

Year: 2023

Type: article

Abstract: We have studied the magnetic response of transverse optical phonons in Pb1􀀀xSnxTe lms. Polarization-dependent terahertz magnetospectroscopy measurements revealed Zeeman splittings and diamagnetic shifts, demonstrating that these phonon modes become chiral in magnetic elds. Films in the topological crystalline insulator phase (x > 0:32) exhibited magnetic moment values that are larger than those for topologically trivial lms (x < 0:32) by two orders of magnitude. Furthermore, the sign of the eective g-factor was opposite in the two phases, a signature of the topological transition within our model. These results strongly indicate the existence of interplay between the magnetic properties of chiral phonons and the topology of electronic band structure.

Source: Biblioteca Digital da Memória Científica do INPE (National Institute for Space Research)

Authors: Hernandez, Felix G., Baydin, Andrey, Chaudhary, Swati, Tay, Fuyang, Katayama, Ikufumi, Takeda, Jun, Nojiri, Hiroyuki, Okazaki, Anderson, Rappl, Paulo Henrique de Oliveira, Abramof, Eduardo, Rodriguez-Vega, Martin A., Fiete, Gregoryt A., Kono, Junichiro

Institutions: Universidade de São Paulo, Rice University, Yokohama National University, Tohoku University, Institute for Materials Research, Tohoku University, Instituto Nacional de Pesquisas Espaciais, Northeastern University, The University of Texas at Austin, Massachusetts Institute of Technology

Language: French

Topic: Topological Materials and Phenomena

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Science Foundation, Fundação de Amparo à Pesquisa do Estado de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Materials Research Science and Engineering Center, Harvard University, Japan Society for the Promotion of Science, Division of Materials Research

Awards: G1372744343, G1500824199, G2680903639, Kerr/Faraday rotation in quantum materials, G2978038238, G4025248774, The research in new materials involving high magnetic fields and low temperatures, G4402799499, G4913504425, Center for Dynamics and Control of Materials, Development of Phase-Controlled Near Field Spectroscopy with Extremely High Spatiotemporal Resolution, G5719130415, G6725192607, G6796072035, Nonequilibrium Control of Magnetism and Topology Through Selective Phonon Excitations

OpenAlex ID: W6986155928

FWCI:

Cites:

Cited by:

Related to: 10