Acoustomagnetoelectric effects at meso-ultrasonic frequencies in anisotropic semiconductors in arbitrary (classical) magnetic fields |
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Authors: | A A Lipnik |
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Institution: | (1) Kiev Commercial-Economic Institut, Chernovtsy Branch, USSR |
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Abstract: | Anisotropic acoustomagnetoelectric (AME) effects at meso-ultrasonic frequencies are calculated analytically in semiconductors with an anisotropic mobility () in arbitrary classical magnetic fields. For Bq(q is the ultrasonic wave vector) and an arbitrary direction of q two transverse components of the AME field (E
B
q E
y
B
) occur in the crystal, and the longitudinal acoustoelectric field changes under the action of a longitudinal magnetic field (E
q
B
=E
q
B
-E
q
0
),E
B
is even, and E
B
is odd in B; for B 1 the component E
y
B
E
B
/B, andE
B
and E
q
B
are independent of B and can be commensurate with the zero-field acoustoelectric field E
q
0
if the anisotropy of is large (hexagonal ZnS and ZnO or n-Ge highly compressed along 111]). The transverse AME field E
st
B
is calculated in the configuration E
st
B
qBE
st
B
(standard AMEeffect). For B >> 1 the field B 1E
st
B
B
–3, so thatE
B
, E
y
B
, and
q
B
can be greater than E
st
B
here. The acoustoelectric analog of the Grabner effect (E
G
B
), i.e., the component of the AME field along a transverse magnetic field (E
G
B
Bq) is also calculated. For pB > 1 the componentE
G
B
B
–3.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 93–97, June, 1989. |
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Keywords: | |
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