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Electric-field control of spin-orbit splittings in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>GaAs</mml:mtext><mml:mo>/</mml:mo><mml:msub><mml:mrow><mml:mtext>Al</mml:mtext></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mrow><mml:mtext>Ga</mml:mtext></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>โ</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:mtext>As</mml:mtext></mml:mrow></mml:math>coupled quantum wells
Electron spin dynamics is investigated in $n\text{\ensuremath{-}}i\text{\ensuremath{-}}n$ GaAs/AlGaAs coupled quantum wells. The electron-spin dephasing time is measured as a function of an external electrical bias under resonant excitation of the 1sHH intrawell exciton using a time-resolved Kerr rotation technique. There is found a strong electron-spin dephasing time anisotropy caused by โฆ