Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session B13: Electrical Transport in High-Mobility Materials/Devices
11:30 AM–2:06 PM,
Monday, March 4, 2024
Room: M100D
Sponsoring
Unit:
FIAP
Chair: Maricris Mayes, University of Massachusetts Dartmouth
Abstract: B13.00004 : Fractional Conductance Quantisation in MBE Grown High Mobility GaAs Quantum Wells.*
12:06 PM–12:18 PM
Presenter:
Iwan E Pullen
(University College London)
Authors:
Iwan E Pullen
(University College London)
Yilmaz Gul
(London Center for Nanotechnology)
Stuart N Holmes
(London Center Nanotechnology)
Ian Farrer
(University of Sheffield)
David A Ritchie
(Univ of Cambridge)
Michael Pepper
(University College London)
GaAs is particularly attractive due to the low disorder material which can be grown, providing exceptionally pure platforms on which to perform measurements. We report on fractional quantisation displayed in quantum wires grown on such materials and put them into the context of the theory set out by Shavit and Oreg, which suggests they arise due to coherent forward and backward scattering in a zig-zag array of electrons in the low electron density regimes [7].
[1] - Thornton T J et al. 1986 Phys. Rev. Lett. 56 1198
[2] - Wharam D A et al. 1988 J. Phys. C: Solid State Phys. 21 L209
[3] - van Wees B J et al. 1988 Phys. Rev. Lett. 60 848
[4] - Hew W K et al. 2009 Phys. Rev. Lett. 102 056804
[5] - S. Kumar et al. 2019 Phys. Rev. Lett. 122, 086803
[6] - Kumar S and Pepper M 2021 Appl. Phys. Lett. 119, 110502
[7] - Shavit G and Oreg Y 2019 Phys. Rev. Lett. 123, 036803
*We gratefully acknowledge support from EPSRC under grants EP/R029075/1 and EP/S024441/1.
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