TY - JOUR
T1 - Magneto-acoustic phonon antiresonances in Wannier-Stark superlattices
AU - Nogaret, Alain
AU - Eaves, L
AU - main, pc
AU - Henini, M
AU - Maude, D K
AU - Portal, Jean-Claude
AU - Molinari, E
AU - beaumont, sp
PY - 1998/7
Y1 - 1998/7
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/0032118333
U2 - 10.1016/S0038-1101(98)00055-0
DO - 10.1016/S0038-1101(98)00055-0
M3 - Article
SN - 0038-1101
VL - 42
SP - 1489
EP - 1493
JO - Solid State Electronics
JF - Solid State Electronics
IS - 7 - 8
ER -