TY - JOUR
T1 - Effective mass suppression in dilute, spin-polarized two-dimensional electron systems
AU - Padmanabhan, Medini
AU - Gokmen, T.
AU - Bishop, N. C.
AU - Shayegan, M.
PY - 2008/7/7
Y1 - 2008/7/7
N2 - We report effective mass (m*) measurements, via analyzing the temperature dependence of the Shubnikov-de Haas oscillations, for dilute, interacting, two-dimensional electron systems (2DESs) occupying a single conduction-band valley in AlAs quantum wells. When the 2DES is partially spin-polarized, m* is larger than its band value, consistent with previous results on various 2DESs. However, as we fully spin-polarize the 2DES by subjecting it to strong parallel magnetic fields, m* is unexpectedly suppressed and falls even below the band mass.
AB - We report effective mass (m*) measurements, via analyzing the temperature dependence of the Shubnikov-de Haas oscillations, for dilute, interacting, two-dimensional electron systems (2DESs) occupying a single conduction-band valley in AlAs quantum wells. When the 2DES is partially spin-polarized, m* is larger than its band value, consistent with previous results on various 2DESs. However, as we fully spin-polarize the 2DES by subjecting it to strong parallel magnetic fields, m* is unexpectedly suppressed and falls even below the band mass.
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U2 - 10.1103/PhysRevLett.101.026402
DO - 10.1103/PhysRevLett.101.026402
M3 - Article
C2 - 18764203
AN - SCOPUS:47049101781
SN - 0031-9007
VL - 101
JO - Physical review letters
JF - Physical review letters
IS - 2
M1 - 026402
ER -