Quantized Conductance and Large g-Factor Anisotropy in InSb Quantum Point Contacts.

Qu, Fanming; van Veen, Jasper; de Vries, Folkert K; Beukman, Arjan J A; Wimmer, Michael; Yi, Wei; Kiselev, Andrey A; Nguyen, Binh-Minh; Sokolich, Marko; Manfra, Michael J; Nichele, Fabrizio; Marcus, Charles M; Kouwenhoven, Leo P

Qu, Fanming; van Veen, Jasper; de Vries, Folkert K; Beukman, Arjan J A; Wimmer, Michael; Yi, Wei; Kiselev, Andrey A; Nguyen, Binh-Minh; Sokolich, Marko; Manfra, Michael J; Nichele, Fabrizio; Marcus, Charles M; Kouwenhoven, Leo P.

Afiliação

Qu F; QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.
van Veen J; QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.
de Vries FK; QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.
Beukman AJ; QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.
Wimmer M; QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.
Yi W; HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, United States.
Kiselev AA; HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, United States.
Nguyen BM; HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, United States.
Sokolich M; HRL Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265, United States.
Manfra MJ; Department of Physics and Astronomy, and Station Q Purdue, School of Electrical and Computer Engineering, School of Materials Engineering, Purdue University , West Lafayette, Indiana 47907, United States.
Nichele F; Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen , Copenhagen 1017, Denmark.
Marcus CM; Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen , Copenhagen 1017, Denmark.
Kouwenhoven LP; QuTech and Kavli Institute of Nanoscience, Delft University of Technology , 2600 GA Delft, The Netherlands.

Nano Lett ; 16(12): 7509-7513, 2016 12 14.

Article em En | MEDLINE | ID: mdl-27805409

ABSTRACT

ABSTRACT

Because of a strong spin-orbit interaction and a large Landé g-factor, InSb plays an important role in research on Majorana fermions. To further explore novel properties of Majorana fermions, hybrid devices based on quantum wells are conceived as an alternative approach to nanowires. In this work, we report a pronounced conductance quantization of quantum point contact devices in InSb/InAlSb quantum wells. Using a rotating magnetic field, we observe a large in-plane (|g1| = 26) and out-of-plane (|g1| = 52) g-factor anisotropy. Additionally, we investigate crossings of subbands with opposite spins and extract the electron effective mass from magnetic depopulation of one-dimensional subbands.

Palavras-chave

InSb quantum well; conductance quantization; electron effective mass; g-factor anisotropy; quantum point contact

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