Academic Journal
New signatures of the spin gap in quantum point contacts.
| العنوان: | New signatures of the spin gap in quantum point contacts. |
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| المؤلفون: | Hudson, KL, Srinivasan, A, Goulko, O, Adam, J, Wang, Q, Yeoh, LA, Klochan, O, Farrer, I, Ritchie, DA, Ludwig, A, Wieck, AD, von Delft, J, Hamilton, AR |
| بيانات النشر: | Springer Science and Business Media LLC //doi.org/10.1038/s41467-020-19895-3 Nat Commun |
| سنة النشر: | 2021 |
| المجموعة: | Apollo - University of Cambridge Repository |
| مصطلحات موضوعية: | 5108 Quantum Physics, 40 Engineering, 4009 Electronics, Sensors and Digital Hardware, 51 Physical Sciences |
| الوصف: | One dimensional semiconductor systems with strong spin-orbit interaction are both of fundamental interest and have potential applications to topological quantum computing. Applying a magnetic field can open a spin gap, a pre-requisite for Majorana zero modes. The spin gap is predicted to manifest as a field dependent dip on the first 1D conductance plateau. However, disorder and interaction effects make identifying spin gap signatures challenging. Here we study experimentally and numerically the 1D channel in a series of low disorder p-type GaAs quantum point contacts, where spin-orbit and hole-hole interactions are strong. We demonstrate an alternative signature for probing spin gaps, which is insensitive to disorder, based on the linear and non-linear response to the orientation of the applied magnetic field, and extract a spin-orbit gap ΔE ≈ 500 μeV. This approach could enable one-dimensional hole systems to be developed as a scalable and reproducible platform for topological quantum applications. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf; text/xml |
| اللغة: | English |
| Relation: | https://www.repository.cam.ac.uk/handle/1810/315659 |
| DOI: | 10.17863/CAM.62773 |
| الاتاحة: | https://www.repository.cam.ac.uk/handle/1810/315659 https://doi.org/10.17863/CAM.62773 |
| Rights: | Attribution 4.0 International (CC BY 4.0) ; https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.D1A150B8 |
| قاعدة البيانات: | BASE |
| DOI: | 10.17863/CAM.62773 |
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