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Temperature depende...
Temperature dependence of dynamic nuclear polarization and its effect on electron spin relaxation and dephasing in InAs/GaAs quantum dots
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- Beyer, Jan (författare)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Puttisong, Yuttapoom (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska högskolan
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- Buyanova, Irina (författare)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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- Suraprapapich, S. (författare)
- Department of Electrical and Computer Engineering, University of California, La Jolla, California 92093, USA
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- Tu, C. W. (författare)
- Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California, USA
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- Chen, Weimin (författare)
- Linköpings universitet,Funktionella elektroniska material,Tekniska högskolan
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(creator_code:org_t)
- American Institute of Physics (AIP), 2012
- 2012
- Engelska.
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Ingår i: Applied Physics Letters. - : American Institute of Physics (AIP). - 0003-6951 .- 1077-3118. ; 100:14, s. 143105-
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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http://liu.diva-port...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Electron spin dephasing and relaxation due to hyperfine interaction with nuclear spins is studied in an InAs/GaAs quantum dot ensemble as a function of temperature up to 85 K, in an applied longitudinal magnetic field. The extent of hyperfineinduced dephasing is found to decrease, whereas dynamic nuclear polarization increases with increasing temperature. We attribute both effects to an accelerating electron spin relaxation through phonon-assisted electron-nuclear spin flip-flops driven by hyperfine interactions, which could become the dominating contribution to electron spin depolarization at high temperatures.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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