Direct measurement of spin-flip rates of a self-assembled InAs double quantum dot in single-electron tunneling
Spin flips are one of the limiting factors for spin-based information processing. We demonstrate a transport approach for determining the spin-flip rates of a self-assembled InAs double quantum dot occupied by a single electron. In such devices, different Landé factors lead to an inhomogeneous Zeema...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/393427 |
| Acceso en línea: | http://hdl.handle.net/10261/393427 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85187955375&doi=10.1103%2fPhysRevB.109.L121404&partnerID=40&md5=4a15ea54682b70c94346556a174d95e0 |
| Access Level: | acceso abierto |
| Palabra clave: | Coulomb blockade Electrical conductivity Quantum transport Spin blockade Double quantum dots Quantum master equation |
| Sumario: | Spin flips are one of the limiting factors for spin-based information processing. We demonstrate a transport approach for determining the spin-flip rates of a self-assembled InAs double quantum dot occupied by a single electron. In such devices, different Landé factors lead to an inhomogeneous Zeeman splitting, so that the two spin channels can never be at resonance simultaneously, leading to a spin blockade at low temperatures. This blockade is analyzed in terms of spin flips for different temperatures and magnetic fields. Our results are in good agreement with a quantum master equation that combines the dot-lead couplings with ohmic dissipation stemming from spin-flip cotunneling. © 2024 American Physical Society. |
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