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Thermoelectric characteristics of uniaxially deformed n‐Si in the temperature range 85–355 K
Author(s) -
Gaidar Galyna,
Baranskii Petro
Publication year - 2016
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600174
Subject(s) - anisotropy , thermoelectric effect , condensed matter physics , atmospheric temperature range , materials science , phonon drag , drag , thermodynamics , seebeck coefficient , physics , optics
The temperature dependences of thermoelectromotive force (thermo‐emf), tenso‐thermo‐emf (at X ∥ ∇ T ∥ [ 001 ] , X = 1.2 GPa), thermo‐emf anisotropy Δ α = α | | ph − α ⊥ ph , anisotropy parameter of drag thermo‐emf M = α | | ph / α ⊥ phand thermoelectric figure of merit Z a of n‐Si⟨P⟩ crystals with charge carrier concentrationn e ≈ 1.75 × 10 14 cm −3 were investigated in the temperature range 85 K ≤ T ≤ 355 K. It was found that with increasing temperature the anisotropy parameter of drag thermo‐emf M decreases 2.4‐fold, and the anisotropy parameter of mobility K , 2.3‐fold. It is shown that the anisotropy parameter of drag thermo‐emf M decreases with temperature much slower than thermo‐emf anisotropy Δ α . It is also shown that within the entire temperature range, the thermo‐emf anisotropy Δ α exceeds the thermo‐emf anisotropy, typical for the conventional thermoelectric anisotropic materials in the absence of deformation.