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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Electron wave-function spillover in self-assembled InAs/InP quantum wires
AU - Maes, J
AU - Hayne, M
AU - Sidor, Y
AU - Partoens, B
AU - Peeters, F M
AU - Gonzalez, Y
AU - Gonzalez, L
AU - Fuster, D
AU - Garcia, Jorge M.
AU - Moshchalkov, V V
PY - 2004/10/15
Y1 - 2004/10/15
N2 - Charge confinement in InAs/InP self-assembled quantum wires is studied experimentally using photoluminescence in pulsed magnetic fields and theoretically using adiabatic theory within the effective-mass approximation, taking into account the strain in the samples. We show both experimentally and theoretically that, in spite of the large conduction band offset, the electron wave function is significantly spilled out of the wire in the wire height direction for thin wires. Furthermore, for a wire thickness of up to 8 monolayers, the electron spillover is inversely related to the wire height. These effects are due to the large zero point energy of the electron. As the wire becomes thicker, the decrease in confinement energy is reflected in a reduction of the electron wave-function extent.
AB - Charge confinement in InAs/InP self-assembled quantum wires is studied experimentally using photoluminescence in pulsed magnetic fields and theoretically using adiabatic theory within the effective-mass approximation, taking into account the strain in the samples. We show both experimentally and theoretically that, in spite of the large conduction band offset, the electron wave function is significantly spilled out of the wire in the wire height direction for thin wires. Furthermore, for a wire thickness of up to 8 monolayers, the electron spillover is inversely related to the wire height. These effects are due to the large zero point energy of the electron. As the wire becomes thicker, the decrease in confinement energy is reflected in a reduction of the electron wave-function extent.
KW - OPTICAL-PROPERTIES
KW - DIAMAGNETIC SHIFT
KW - EPITAXIAL-GROWTH
KW - DOTS
KW - NANOSTRUCTURES
KW - EXCITONS
KW - MAGNETOPHOTOLUMINESCENCE
KW - CONFINEMENT
KW - ISLANDS
KW - WELLS
U2 - 10.1103/PhysRevB.70.155311
DO - 10.1103/PhysRevB.70.155311
M3 - Journal article
VL - 70
JO - Physical review B
JF - Physical review B
SN - 1550-235X
IS - 15
M1 - 155311
ER -