Klinovaja, Jelena and Loss, Daniel. (2013) Fractional Fermions with Non-Abelian Statistics. Physical Review Letters, 110 (12). p. 126402.
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Official URL: http://edoc.unibas.ch/dok/A6338765
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Abstract
We present transport experiments performed in high-quality quantum point contacts embedded in a GaAs two-dimensional hole gas. The strong spin-orbit interaction results in peculiar transport phenomena, including the previously observed anisotropic Zeeman splitting and level-dependent effective g factors. Here we find additional effects, namely, the crossing and the anticrossing of spin-split levels depending on subband index and magnetic field direction. Our experimental observations are reconciled in a heavy-hole effective spin-orbit Hamiltonian where cubic- and quadratic-in-momentum terms appear. The spin-orbit components, being of great importance for quantum computing applications, are characterized in terms of magnitude and spin structure. In light of our results, we explain the level-dependent effective g factor in an in-plane field. Through a tilted magnetic field analysis, we show that the quantum point contact out-of-plane g factor saturates around the predicted 7.2 bulk value.
Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja) 05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss) |
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UniBasel Contributors: | Klinovaja, Jelena and Loss, Daniel |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
Publisher: | American Physical Society |
ISSN: | 0031-9007 |
e-ISSN: | 1079-7114 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
Identification Number: |
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Last Modified: | 24 Aug 2023 09:44 |
Deposited On: | 10 Apr 2015 09:12 |
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