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Electrical spin injection and transport in Germanium

We report the first experimental demonstration of electrical spin injection, transport and detection in bulk germanium (Ge). The non-local magnetoresistance in n-type Ge is observable up to 225K. Our results indicate that the spin relaxation rate in the n-type Ge is closely related to the momentum scattering rate, which is consistent with the predicted Elliot-Yafet spin relaxation mechanism for Ge. The bias dependence of the nonlocal magnetoresistance and the spin lifetime in n-type Ge is also investigated.

preprint2011arXivOpen access
Yi ZhouWei HanLi-Te ChangFaxian XiuMinsheng WangMichael OehmeInga A. FischerJoerg SchulzeRoland. K. KawakamiKang L. Wang
cond-mat.mes-hall
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Open access10 authors1 topic
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Yi ZhouWei HanLi-Te ChangFaxian XiuMinsheng WangMichael OehmeInga A. FischerJoerg SchulzeRoland. K. KawakamiKang L. Wang

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