Evidence for a large Rashba splitting in PtPb4 from angle-resolved photoemission spectroscopy
Date
2021-02-18
Authors
Lee, Kyungchan
Mou, Daixiang
Jo, Na Hyun
Wu, Yun
Schrunk, Benjamin
Wilde, John
Kreyssig, Andreas
Estry, Amelia
Bud’ko, Sergey
Major Professor
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Canfield, Paul
Distinguished Professor
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Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
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Ames National LaboratoryPhysics and Astronomy
Abstract
We studied the electronic structure of PtPb4 using laser angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations. This material is closely related to PtSn4, which exhibits exotic topological properties such as Dirac node arcs. The Fermi surface (FS) of PtPb4 consists of two electron pockets at the center of the Brillouin zone (BZ) and several hole pockets around the zone boundaries. Our ARPES data reveal significant Rashba splitting at the Γ point, in agreement with DFT calculations. The presence of Rashba splitting may render this material of potential interest for spintronic applications.