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Manipulation of spin dynamics in semiconductor structures by orientation of small external magnetic field

Litvinenko, K, Leontiadou, M, Li, J, Bowyer, E, Clowes, S, Pidgeon, CR and Murdin, B (2011) Manipulation of spin dynamics in semiconductor structures by orientation of small external magnetic field In: ICPS2010, 30th International Conference on the Physics of Semiconductors, 2010-07-25 - 2010-07-30, Seoul, South Korea.

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Abstract

Electron spin relaxation times have been measured in InSb and InAs quantum wells and epi-layers in a moderate (<4T) external magnetic field by means of time-resolved optical orientation using circularly polarised light. A strong and opposite field dependence of the spin lifetime was observed for longitudinal (Faraday) and transverse (Voigt) configuration. In the Faraday configuration the spin lifetime increases because the DP dephasing process is suppressed. At the high field limit the EY relaxation process dominates, enabling its direct determination. Conversely, in the Voigt configuration an additional efficient spin dephasing mechanism dominates and shortens the electron spin lifetime considerably with B-2. We demonstrate that for narrow gap semiconductors simply changing the direction of the magnetic field of 1T can alter the electron spin lifetime by one order of magnitude.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Litvinenko, Kk.litvinenko@surrey.ac.ukUNSPECIFIED
Leontiadou, MUNSPECIFIEDUNSPECIFIED
Li, Jjuerong.li@surrey.ac.ukUNSPECIFIED
Bowyer, Ee.t.bowyer@surrey.ac.ukUNSPECIFIED
Clowes, Ss.clowes@surrey.ac.ukUNSPECIFIED
Pidgeon, CRUNSPECIFIEDUNSPECIFIED
Murdin, Bb.murdin@surrey.ac.ukUNSPECIFIED
Date : 2011
Identification Number : 10.1063/1.3666548
Contributors :
ContributionNameEmailORCID
publisherAmerican Institute of Physics, UNSPECIFIEDUNSPECIFIED
Uncontrolled Keywords : semiconductor, spin, magnetic field
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 11:49
Last Modified : 17 May 2017 14:59
URI: http://epubs.surrey.ac.uk/id/eprint/832846

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