TY - JOUR
T1 - Dependence of effective mass on spin and valley degrees of freedom
AU - Gokmen, T.
AU - Padmanabhan, Medini
AU - Shayegan, M.
PY - 2008/10/2
Y1 - 2008/10/2
N2 - We measure the effective mass (m*) of interacting two-dimensional electrons confined to an AlAs quantum well while we change the conduction-band valley occupation and the spin polarization via the application of strain and magnetic field, respectively. Compared to its band value, m* is enhanced unless the electrons are fully valley- and spin-polarized. Incidentally, in the fully spin- and valley-polarized regime, the electron system exhibits an insulating behavior.
AB - We measure the effective mass (m*) of interacting two-dimensional electrons confined to an AlAs quantum well while we change the conduction-band valley occupation and the spin polarization via the application of strain and magnetic field, respectively. Compared to its band value, m* is enhanced unless the electrons are fully valley- and spin-polarized. Incidentally, in the fully spin- and valley-polarized regime, the electron system exhibits an insulating behavior.
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U2 - 10.1103/PhysRevLett.101.146405
DO - 10.1103/PhysRevLett.101.146405
M3 - Article
C2 - 18851552
AN - SCOPUS:53549110212
SN - 0031-9007
VL - 101
JO - Physical review letters
JF - Physical review letters
IS - 14
M1 - 146405
ER -