Quantized conductance and large g-factor anisotropy in InSb quantum point contacts

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

doi:10.1021/acs.nanolett.6b03297

Quantized conductance and large g-factor anisotropy in InSb quantum point contacts

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

Condensed Matter Physics

25 Citations (Scopus)

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.

Original language	English
Journal	Nano Letters
Volume	16
Issue number	12
Pages (from-to)	7509-7513
Number of pages	5
ISSN	1530-6984
DOIs	https://doi.org/10.1021/acs.nanolett.6b03297
Publication status	Published - 14 Dec 2016

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1608.05478(1)Accepted author manuscript, 2.14 MB

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title = "Quantized conductance and large g-factor anisotropy in InSb quantum point contacts",

abstract = "Because of a strong spin-orbit interaction and a large Land{\'e} 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.",

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

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TY - JOUR

T1 - Quantized conductance and large g-factor anisotropy in InSb quantum point contacts

AU - Qu, Fanming

AU - van Veen, Jasper

AU - de Vries, Folkert K.

AU - Beukman, Arjan J. A.

AU - Wimmer, Michael

AU - Wei, Yi

AU - Kiselev, Andrey A.

AU - Nguyen, Binh-Minh

AU - Sokolich, Marko

AU - Manfra, Michael J.

AU - Nichele, Fabrizio

AU - Marcus, Charles M.

AU - Kouwenhoven, Leo P.

N1 - [Qdev]

PY - 2016/12/14

Y1 - 2016/12/14

N2 - 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.

AB - 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.

U2 - 10.1021/acs.nanolett.6b03297

DO - 10.1021/acs.nanolett.6b03297

M3 - Letter

C2 - 27805409

SN - 1530-6984

VL - 16

SP - 7509

EP - 7513

JO - Nano Letters

JF - Nano Letters

IS - 12

ER -

Quantized conductance and large g-factor anisotropy in InSb quantum point contacts

Abstract

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