title: Large spin-orbit coupling and helical spin textures in 2D heterostructure [Pb2BiS3][AuTe2].
abstract: Two-dimensional heterostructures with strong spin-orbit coupling have direct relevance to topological quantum materials and potential applications in spin-orbitronics. In this work, we report on novel quantum phenomena in [Pb2BiS3][AuTe2], a new 2D strong spin-orbit coupling heterostructure system. Transport measurements reveal the spin-related carrier scattering is at odds with the Abrikosov-Gorkov model due to strong spin-orbit coupling. This is consistent with our band structure calculations which reveal a large spin-orbit coupling gap of εso= 0.21 eV. The band structure is also characterized by helical-like spin textures which are mainly induced by strong spin-orbit coupling and the inversion symmetry breaking in the heterostructure system.
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.|Advanced Material Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea.
authors.forename: L
authors.initials: L
authors.lastname: Fang
authors.affiliation: Chemistry Department, Northwestern University, Evanston, IL 60208, USA.
authors.forename: J
authors.initials: J
authors.lastname: Im
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
authors.forename: W
authors.initials: W
authors.lastname: DeGottardi
authors.affiliation: NUFAB, Northwestern University, Evanston, IL 60208, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Jia
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.|Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA.
authors.forename: A
authors.initials: A
authors.lastname: Glatz
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
authors.forename: K A
authors.initials: KA
authors.lastname: Matveev
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
authors.forename: W-K
authors.initials: WK
authors.lastname: Kwok
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
authors.forename: G W
authors.initials: GW
authors.lastname: Crabtree
authors.affiliation: Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.|Advanced Material Division, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea.
authors.forename: M G
authors.initials: MG
authors.lastname: Kanatzidis