Hanle-effect measurements of spin injection from Mn5Ge3C0.8/Al2O3-contacts into degenerately doped Ge channels on Si

Inga Anita Fischer, Li Te Chang, Christoph Sürgers, Erlend Rolseth, Sebastian Reiter, Stefan Stefanov, Stefano Chiussi, Jianshi Tang, Kang L. Wang, Jörg Schulze

Research output: Contribution to journalArticlepeer-review

Abstract

We report electrical spin injection and detection in degenerately doped n-type Ge channels using Mn5Ge3C0.8/Al2O3/n+-Ge tunneling contacts for spin injection and detection. The whole structure is integrated on a Si wafer for complementary metal-oxide-semiconductor compatibility. From three-terminal Hanle-effect measurements, we observe a spin accumulation up to 10 K. The spin lifetime is extracted to be 38 ps at T = 4 K using Lorentzian fitting, and the spin diffusion length is estimated to be 367 nm due to the high diffusion coefficient of the highly doped Ge channel.

Original languageEnglish
Article number222408
JournalApplied Physics Letters
Volume105
Issue number22
DOIs
Publication statusPublished - 2014 Dec 1

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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