TY - JOUR
T1 - Carrier-lifetime enhancement and mass discontinuity inferred from transport in a parabolic quantum well during subband depopulation
AU - Facer, G.
AU - Kane, B.
AU - Clark, R.
AU - Pfeiffer, L.
AU - West, K.
PY - 1997
Y1 - 1997
N2 - In (Formula presented) parabolic quantum wells, subbands are depopulated by a magnetic field in the well plane. A small additional perpendicular field induces Shubnikov-de Haas (SdH) oscillations, which we have used to determine the carrier density, effective mass, and lifetime, throughout the two-subband-to-one-subband transition. The masses of carriers in the first and second subbands differ by 50% near the threshold of population of the second subband. The second subband SdH lifetime is enhanced near the threshold, even though the onset of two-subband transport increases the sample resistance.
AB - In (Formula presented) parabolic quantum wells, subbands are depopulated by a magnetic field in the well plane. A small additional perpendicular field induces Shubnikov-de Haas (SdH) oscillations, which we have used to determine the carrier density, effective mass, and lifetime, throughout the two-subband-to-one-subband transition. The masses of carriers in the first and second subbands differ by 50% near the threshold of population of the second subband. The second subband SdH lifetime is enhanced near the threshold, even though the onset of two-subband transport increases the sample resistance.
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U2 - 10.1103/PhysRevB.56.R10036
DO - 10.1103/PhysRevB.56.R10036
M3 - Article
AN - SCOPUS:0000075579
SN - 1098-0121
VL - 56
SP - R10036-R10039
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 16
ER -