Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-11-04
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 3 figures ; added some discussions
Scientific paper
10.1209/0295-5075/83/47006
The manipulation of spin degree of freedom have been demonstrated in spin polarized electron plasma in a heterostructure by using exchange-interaction induced dynamic spin splitting rather than the Rashba and Dresselhaus types, as revealed by time resolved Kerr rotation. The measured spin splitting increases from 0.256meV to 0.559meV as the bias varies from -0.3V to -0.6V. Both the sign switch of Kerr signal and the phase reversal of Larmor precessions have been observed with biases, which all fit into the framework of exchange-interaction-induced spin splitting. The electrical control of it may provide a new effective scheme for manipulating spin-selected transport in spin FET-like devices.
Ji Youqing
Li G. R.
Liu Jinjie
Zhang Fangfu
Zheng Hou-Zhi
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