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Electric dipole spin resonance in systems with a valley dependent g-factor

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2016

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https://doi.org/10.1103/PhysRevB.93.205433
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http://arxiv.org/abs/1603.02829

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Physical Review B. 2016, 93(20), 205433. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.93.205433

Zusammenfassung

In this theoretical study we qualitatively and quantitatively investigate the electric dipole spin resonance (EDSR) in a single Si/SiGe quantum dot in the presence of a magnetic field gradient, e.g., produced by a ferromagnet. We model a situation in which the control of electron spin states is achieved by applying an oscillatory electric field, inducing real-space oscillations of the electron inside the quantum dot. One of the goals of our study is to present a microscopic theory of valley dependent $g$-factors in Si/SiGe quantum dots and investigate how valley relaxation combined with a valley dependent $g$-factor leads to a novel electron spin dephasing mechanism. Furthermore, we discuss the interplay of spin and valley relaxations in Si/SiGe quantum dots. Our findings suggest that the electron spin dephases due to valley relaxation, and are in agreement with recent experimental studies [Nature Nanotechnology 9, 666-670 (2014)].

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ISO 690RANCIC, Marko J., Guido BURKARD, 2016. Electric dipole spin resonance in systems with a valley dependent g-factor. In: Physical Review B. 2016, 93(20), 205433. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.93.205433
BibTex
@article{Rancic2016Elect-34901,
  year={2016},
  doi={10.1103/PhysRevB.93.205433},
  title={Electric dipole spin resonance in systems with a valley dependent g-factor},
  number={20},
  volume={93},
  issn={2469-9950},
  journal={Physical Review B},
  author={Rancic, Marko J. and Burkard, Guido},
  note={9 pages, 9 figures Article Number: 205433}
}
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9 pages, 9 figures
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