Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots

Gomanko, Maksim; de Jong, Eline J.; Jiang, Yifan; Schellingerhout, Sander G.; Bakkers, Erik; Frolov, Sergey M.

doi:10.21468/SciPostPhys.13.4.089

SciPost Physics

Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots

M. Gomanko, E. J. de Jong, Y. Jiang, S. G. Schellingerhout, E. P. A. M. Bakkers, S. M. Frolov

SciPost Phys. 13, 089 (2022) · published 10 October 2022

doi: 10.21468/SciPostPhys.13.4.089
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Abstract

We investigate quantum dots in semiconductor PbTe nanowire devices. Due to the accessibility of ambipolar transport in PbTe, quantum dots can be occupied both with electrons and holes. Owing to a very large dielectric constant in PbTe of order 1000, we do not observe Coulomb blockade which typically obfuscates the orbital and spin spectra. We extract large and highly anisotropic effective Lande g-factors, in the range 20-44. The absence of Coulomb blockade allows direct readout, at zero source-drain bias, of spin-orbit hybridization energies of up to 600 microelectronvolt. These spin properties make PbTe nanowires, the recently synthesized members of group IV-VI materials family, attractive as a materials platform for quantum technology, such as spin and topological qubits.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.13.4.089
TI  - Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots
PY  - 2022/10/10
UR  - https://scipost.org/SciPostPhys.13.4.089
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 13
IS  - 4
SP  - 089
A1  - Gomanko, Maksim
AU  - de Jong, Eline J.
AU  - Jiang, Yifan
AU  - Schellingerhout, Sander G.
AU  - Bakkers, Erik
AU  - Frolov, Sergey M.
AB  - We investigate quantum dots in semiconductor PbTe nanowire devices. Due to the accessibility of ambipolar transport in PbTe, quantum dots can be occupied both with electrons and holes. Owing to a very large dielectric constant in PbTe of order 1000, we do not observe Coulomb blockade which typically obfuscates the orbital and spin spectra. We extract large and highly anisotropic effective Lande g-factors, in the range 20-44. The absence of Coulomb blockade allows direct readout, at zero source-drain bias, of spin-orbit hybridization energies of up to 600 microelectronvolt. These spin properties make PbTe nanowires, the recently synthesized members of group IV-VI materials family, attractive as a materials platform for quantum technology, such as spin and topological qubits.
ER  -

@Article{10.21468/SciPostPhys.13.4.089,
	title={{Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots}},
	author={M. Gomanko and E. J. de Jong and Y. Jiang and S. G. Schellingerhout and E. P. A. M. Bakkers and S. M. Frolov},
	journal={SciPost Phys.},
	volume={13},
	pages={089},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.13.4.089},
	url={https://scipost.org/10.21468/SciPostPhys.13.4.089},
}

Cited by 8

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¹ Maksim Gomanko,
² Eline J. de Jong,
¹ Yifan Jiang,
² Sander G. Schellingerhout,
² Erik Bakkers,
¹ Sergey M. Frolov