We have measured the hopping current of electrons magnetically confined in a 1D superlattice. We find that phonon assisted hopping between Wannier-Stark states vanishes at hopping energies where the momentum of an LA phonon mode satisfies the condition of Bragg reflection in the superlattice. This effect proves that, even in the presence of an external electric field, the electron states of a crystal conserve their periodicity in k-space. This periodicity reveals a fundamental property of Wannier's effective Hamiltonian. (C) 1998 Elsevier Science Ltd. All rights reserved.

Magneto-acoustic phonon antiresonances in Wannier-Stark superlattices / Nogaret, A; Eaves, L; Main, Pc; Henini, M; Maude, Dk; Portal, Jc; Molinari, Elisa; Beaumont, Sp. - In: SOLID-STATE ELECTRONICS. - ISSN 0038-1101. - STAMPA. - 42:(1998), pp. 1489-1493.

Magneto-acoustic phonon antiresonances in Wannier-Stark superlattices

MOLINARI, Elisa;
1998

Abstract

We have measured the hopping current of electrons magnetically confined in a 1D superlattice. We find that phonon assisted hopping between Wannier-Stark states vanishes at hopping energies where the momentum of an LA phonon mode satisfies the condition of Bragg reflection in the superlattice. This effect proves that, even in the presence of an external electric field, the electron states of a crystal conserve their periodicity in k-space. This periodicity reveals a fundamental property of Wannier's effective Hamiltonian. (C) 1998 Elsevier Science Ltd. All rights reserved.
1998
42
1489
1493
Magneto-acoustic phonon antiresonances in Wannier-Stark superlattices / Nogaret, A; Eaves, L; Main, Pc; Henini, M; Maude, Dk; Portal, Jc; Molinari, Elisa; Beaumont, Sp. - In: SOLID-STATE ELECTRONICS. - ISSN 0038-1101. - STAMPA. - 42:(1998), pp. 1489-1493.
Nogaret, A; Eaves, L; Main, Pc; Henini, M; Maude, Dk; Portal, Jc; Molinari, Elisa; Beaumont, Sp
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/8350
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