Thermally Generated Spin Signals in a Nondegenerate Silicon Spin Valve

Naoto Yamashita, Yuichiro Ando, Hayato Koike, Shinji Miwa, Yoshishige Suzuki, Masashi Shiraishi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Thermally generated spin signals are observed in a nondegenerate Si spin valve. The spin-dependent Seebeck effect is used for thermal spin-signal generation. A thermal gradient of about 200 mK at the interface of Fe and Si enables the generation of a spin voltage of 8 μV at room temperature. A simple expansion of the conventional spin-drift-diffusion model that takes into account the spin-dependent Seebeck effect shows that semiconductor materials are more promising for thermal spin-signal generation comparing than metallic materials, and thus enable efficient heat recycling in semiconductor spin devices.

Original languageEnglish
Article number054002
JournalPhysical Review Applied
Issue number5
Publication statusPublished - May 2 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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