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Proceedings Paper

Thermopower of various phases and states of Si at high pressure
Author(s): V. V. Shchennikov; Vs. V. Shchennikov; S. V. Streltsov; I. V. Korobeynikov; S. V. Ovsyannikov
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Paper Abstract

In the present work the technique of high-pressure thermoelectric (TE) investigation has been developed for the phase transition recording at Si and the values of thermopower (S) for different high pressure and metastable phases of Si have been obtained using automated high-pressure set-up. The technique of Raman scattering, as well as ultra-soft x-ray emission spectroscopy, have been used for control of both the initial and metastable states at ambient conditions. The TE properties of various phases and states of Si were established which may be potentially used in Si-based nano-thermoelectric devices [1]. The technique was shown also to be sensitive to all the pre-treatments applied to a sample including annealing, doping, and irradiation by high-energy particles. The band structure calculations of several phases of Si were carried out using linear muffin-tin orbital method (LMTO). The experimental values of thermoelectric power of various phases of Si up to 25 GPa are compared with the theoretical estimations basing on the band structure calculations performed. The results of the investigation of thermoelectrical properties of Si seems to be relevant also due to recent progress in Si-based thermomechanical data storage systems [2].

Paper Details

Date Published:
PDF: 9 pages
Proc. SPIE 8248, Micromachining and Microfabrication Process Technology XVII, 82480L; doi: 10.1117/12.909791
Show Author Affiliations
V. V. Shchennikov, Institute of Metal Physics (Russian Federation)
Vs. V. Shchennikov, Institute of Engineering Sciences (Russian Federation)
S. V. Streltsov, Institute of Metal Physics (Russian Federation)
I. V. Korobeynikov, Institute of Metal Physics (Russian Federation)
S. V. Ovsyannikov, Univ. Bayreuth (Germany)
Institute for Solid State Chemistry (Russian Federation)

Published in SPIE Proceedings Vol. 8248:
Micromachining and Microfabrication Process Technology XVII
Mary Ann Maher; Paul J. Resnick, Editor(s)

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