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Piezoresistance and Magnetopiezoresistance of n‐Ge in the [110] Direction
Author(s) -
Baranskii P. I.,
Buda I. S.,
Dakhovskii I. V.,
Kolomoets V. V.
Publication year - 1971
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.2220460240
Subject(s) - anisotropy , condensed matter physics , scattering , materials science , atomic physics , saturation (graph theory) , physics , nuclear magnetic resonance , optics , mathematics , combinatorics
The piezoresistance and magnetopieresistance were investigated in n‐Ge ( n e = 1.48 × 10 13 cm −3 ) for X ∥ H ∥ [110] at T = 77 °K (0 ≦ | X | ≦ 6000 kp cm −2 ; 0 ≦ | H | ≦ 100 kOe). It is shown that in the range of magnetic saturation the longitudinal magneto‐resistance is approximately increased by 10 times when X ∥ [110] is altered from zero up to 6 × 10 3 kp cm −2 . On the basis of anisotropic scattering theory the dependences ϱ = f(X ), ( f ) x = f(H ), (Δϱ H ∥/Δϱ 0 ) x = f(X ) (Δϱ H ∥/ϱ 0 ) H = f ( X ) were calculated, using the constants of deformation potentials E u = 16.4 eV, E d = −6.4 eV and assuming that the uniaxial deformation results only in the redistribution of the current carriers between relatively shifted energy minima and does not change the shape of the equal‐energy surfaces in n‐Ge. The results of the experiments are in agreement with the theoretical calculations not only qualitatively but quantitatively. The use of some sets of constants E u and E d mostly used in modern literature (instead of the ones presented above) for the theoretical calculation of the dependence (Δϱ H ∥/ϱ 0 ) H = 50 kOe = f(X ) results in a great disagreement between the curves calculated and the experimental data at | X | < 3000 kp cm −2 .