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Three-dimensional electronic structure in ferromagnetic Fe3Sn2 with breathing kagome bilayers
DOI:
10.1103/PhysRevB.101.161114
Authors:
Hiroaki
Tanaka
(University of Tokyo)
,
Yuita
Fujisawa
(Okinawa Institute of Science and Technology Graduate University)
,
Kenta
Kuroda
(University of Tokyo)
,
Ryo
Noguchi
(University of Tokyo)
,
Shunsuke
Sakuragi
(University of Tokyo)
,
Cedric
Bareille
(University of Tokyo)
,
Barnaby
Smith
(Okinawa Institute of Science and Technology Graduate University)
,
Cephise
Cacho
(Diamond Light Source)
,
Sung Won
Jung
(Diamond Light Source)
,
Takayuki
Muro
(Japan Synchrotron Radiation Research Institute (JASRI))
,
Yoshinori
Okada
(Okinawa Institute of Science and Technology Graduate University)
,
Takeshi
Kondo
(University of Tokyo)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Physical Review B
, VOL 101
State:
Published (Approved)
Published:
April 2020
Diamond Proposal Number(s):
24488
Abstract: A large anomalous Hall effect (AHE) has been observed in ferromagnetic Fe 3 Sn 2 with breathing kagome bilayers. To understand the underlying mechanism for this, we investigate the electronic structure of Fe 3 Sn 2 by angle-resolved photoemission spectroscopy (ARPES). In particular, we use both vacuum ultraviolet light (VUV) and soft x ray (SX), which allow surface-sensitive and relatively bulk-sensitive measurements, respectively, and distinguish bulk states from surface states, which should be unlikely related to the AHE. While VUV-ARPES observes two-dimensional bands mostly due to surface states, SX-ARPES reveals three-dimensional band dispersions with a periodicity of the rhombohedral unit cell in the bulk. Our data show a good consistency with a theoretical calculation based on density functional theory, suggesting a possibility that Fe 3 Sn 2 is a magnetic Weyl semimetal.
Journal Keywords: Anomalous Hall effect; Bilayers; Electronic structure; Topological materials; Ferromagnets; Angle-resolved photoemission spectroscopy
Diamond Keywords: Ferromagnetism
Subject Areas:
Materials,
Physics
Instruments:
I05-ARPES
Added On:
30/04/2020 15:09
Discipline Tags:
Quantum Materials
Physics
Hard condensed matter - structures
Magnetism
Materials Science
Technical Tags:
Spectroscopy
Angle Resolved Photoemission Spectroscopy (ARPES)