title: Giant Spin-Orbit Splitting in Inverted InAs/GaSb Double Quantum Wells.
abstract: Transport measurements in inverted InAs/GaSb quantum wells reveal a giant spin-orbit splitting of the energy bands close to the hybridization gap. The splitting results from the interplay of electron-hole mixing and spin-orbit coupling, and can exceed the hybridization gap. We experimentally investigate the band splitting as a function of top gate voltage for both electronlike and holelike states. Unlike conventional, noninverted two-dimensional electron gases, the Fermi energy in InAs/GaSb can cross a single spin-resolved band, resulting in full spin-orbit polarization. In the fully polarized regime we observe exotic transport phenomena such as quantum Hall plateaus evolving in e^{2}/h steps and a nontrivial Berry phase.
authors.affiliation: Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Nichele
authors.affiliation: Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
authors.forename: Morten
authors.initials: M
authors.lastname: Kjaergaard
authors.affiliation: Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
authors.forename: Henri J
authors.initials: HJ
authors.lastname: Suominen
authors.affiliation: QuTech, Delft University of Technology, 2600 GA Delft, The Netherlands.
authors.forename: Rafal
authors.initials: R
authors.lastname: Skolasinski
authors.affiliation: QuTech, Delft University of Technology, 2600 GA Delft, The Netherlands.
authors.forename: Michael
authors.initials: M
authors.lastname: Wimmer
authors.affiliation: HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, USA.
authors.forename: Binh-Minh
authors.initials: BM
authors.lastname: Nguyen
authors.affiliation: HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, USA.
authors.forename: Andrey A
authors.initials: AA
authors.lastname: Kiselev
authors.affiliation: HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Yi
authors.affiliation: HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, USA.
authors.forename: Marko
authors.initials: M
authors.lastname: Sokolich
authors.affiliation: Department of Physics and Astronomy and Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA, School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, USA, School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA. and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Manfra
authors.affiliation: QuTech, Delft University of Technology, 2600 GA Delft, The Netherlands.
authors.forename: Fanming
authors.initials: F
authors.lastname: Qu
authors.affiliation: QuTech, Delft University of Technology, 2600 GA Delft, The Netherlands.
authors.forename: Arjan J A
authors.initials: AJ
authors.lastname: Beukman
authors.affiliation: QuTech, Delft University of Technology, 2600 GA Delft, The Netherlands.
authors.forename: Leo P
authors.initials: LP
authors.lastname: Kouwenhoven
authors.affiliation: Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
authors.forename: Charles M
authors.initials: CM
authors.lastname: Marcus