Effects of Parity and Symmetry on the Aharonov-Bohm Phase of a Quantum Ring
(2021) In Nano Letters- Abstract
We experimentally investigate the properties of one-dimensional quantum rings that form near the surface of nanowire quantum dots. In agreement with theoretical predictions, we observe the appearance of forbidden gaps in the evolution of states in a magnetic field as the symmetry of a quantum ring is reduced. For a twofold symmetry, our experiments confirm that orbital states are grouped pairwise. Here, a π-phase shift can be introduced in the Aharonov-Bohm relation by controlling the relative orbital parity using an electric field. Studying rings with higher symmetry, we note exceptionally large orbital contributions to the effective g-factor (up to 300), which are many times higher than those previously reported. These findings show... (More)
We experimentally investigate the properties of one-dimensional quantum rings that form near the surface of nanowire quantum dots. In agreement with theoretical predictions, we observe the appearance of forbidden gaps in the evolution of states in a magnetic field as the symmetry of a quantum ring is reduced. For a twofold symmetry, our experiments confirm that orbital states are grouped pairwise. Here, a π-phase shift can be introduced in the Aharonov-Bohm relation by controlling the relative orbital parity using an electric field. Studying rings with higher symmetry, we note exceptionally large orbital contributions to the effective g-factor (up to 300), which are many times higher than those previously reported. These findings show that the properties of a phase-coherent system can be significantly altered by the nanostructure symmetry and its interplay with wave function parity.
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- author
- Debbarma, Rousan LU ; Potts, Heidi LU ; Stenberg, Calle Janlén LU ; Tsintzis, Athanasios LU ; Lehmann, Sebastian LU ; Dick, Kimberly LU ; Leijnse, Martin LU and Thelander, Claes LU
- organization
- publishing date
- 2021-12-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Aharonov-Bohm effect, parity, quantum dot, quantum ring, symmetry
- in
- Nano Letters
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:34910870
- scopus:85121914933
- ISSN
- 1530-6984
- DOI
- 10.1021/acs.nanolett.1c03882
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
- id
- 653408a1-6353-402e-ab4d-e9014a566e38
- date added to LUP
- 2022-01-30 13:16:09
- date last changed
- 2024-09-08 08:51:18
@article{653408a1-6353-402e-ab4d-e9014a566e38, abstract = {{<p>We experimentally investigate the properties of one-dimensional quantum rings that form near the surface of nanowire quantum dots. In agreement with theoretical predictions, we observe the appearance of forbidden gaps in the evolution of states in a magnetic field as the symmetry of a quantum ring is reduced. For a twofold symmetry, our experiments confirm that orbital states are grouped pairwise. Here, a π-phase shift can be introduced in the Aharonov-Bohm relation by controlling the relative orbital parity using an electric field. Studying rings with higher symmetry, we note exceptionally large orbital contributions to the effective g-factor (up to 300), which are many times higher than those previously reported. These findings show that the properties of a phase-coherent system can be significantly altered by the nanostructure symmetry and its interplay with wave function parity. </p>}}, author = {{Debbarma, Rousan and Potts, Heidi and Stenberg, Calle Janlén and Tsintzis, Athanasios and Lehmann, Sebastian and Dick, Kimberly and Leijnse, Martin and Thelander, Claes}}, issn = {{1530-6984}}, keywords = {{Aharonov-Bohm effect; parity; quantum dot; quantum ring; symmetry}}, language = {{eng}}, month = {{12}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Nano Letters}}, title = {{Effects of Parity and Symmetry on the Aharonov-Bohm Phase of a Quantum Ring}}, url = {{http://dx.doi.org/10.1021/acs.nanolett.1c03882}}, doi = {{10.1021/acs.nanolett.1c03882}}, year = {{2021}}, }