Abstract
We experimentally investigate the dynamics of spins in GaAs quantum wells under applied electric bias by photoluminescence (PL) measurements excited with circularly polarized light. The bias-dependent circular polarization of PL (PPL) with and without magnetic field is studied. ThePPLwithout magnetic field is found to be decayed with an enhancement of increasing the strength of the negative bias. However,PPLin a transverse magnetic field shows oscillations under an electric bias, indicating that the precession of electron spin occurs in quantum wells. The results are discussed based on the electron–hole exchange interaction in the electric field.
Highlights
Possibility of using information carried by the spin of the electron in electronic devices, in addition to its charge, has gained a lot of attention since the discovery of long spin lifetimes in semiconductor structures [1], leading to theM
Miah Department of Physics, University of Chittagong, Chittagong 4331, Bangladesh growth of the field spintronics [1,2,3]. This may lead to new devices beyond well-established storage or memory applications, already implemented as giant magnetoresistance (GMR) read-heads and nonvolatile magnetic RAM (MRAM) [2]
We focus on spin dynamics in GaAs quantum wells (QWs) under applied electric bias by photoluminescence (PL) measurements excited with circularly polarized light [7,8,9]
Summary
Possibility of using information carried by the spin of the electron in electronic devices, in addition to its charge, has gained a lot of attention since the discovery of long spin lifetimes in semiconductor structures [1], leading to theM. We focus on spin dynamics in GaAs quantum wells (QWs) under applied electric bias by photoluminescence (PL) measurements excited with circularly polarized light [7,8,9]. We study the bias-dependent circular polarization of PL (PPL) with and without magnetic field.
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