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Spin and Orbital Spectroscopy in the Absence of Coulomb Blockade in Lead Telluride Nanowire Quantum Dots
by M. Gomanko, E. J. de Jong, Y. Jiang, S. G. Schellingerhout, E. P. A. M. Bakkers, S. M. Frolov
This Submission thread is now published as
|Authors (as registered SciPost users):||Sergey Frolov|
|Preprint Link:||https://arxiv.org/abs/2111.13242v2 (pdf)|
|Date submitted:||2022-05-24 23:04|
|Submitted by:||Frolov, Sergey|
|Submitted to:||SciPost Physics|
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.
Published as SciPost Phys. 13, 089 (2022)
Author comments upon resubmission
First of all, thank you for your feedback on this paper.
Indeed, there were a few overlooked issues with the paper (a couple of references missing, device description details lacking), which are revised and fixed now. We improved the literature coverage of IV-VI semiconductor nanowires in the introductory part and added more experimental details about our nanowires and devices, and how they are different from each other.
We comment in subsequent posts in more detail.
Submission & Refereeing History
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- Report 2 submitted on 2022-07-19 10:06 by Anonymous
- Report 1 submitted on 2022-07-17 23:03 by Anonymous