TY - JOUR
T1 - Rotation of the conduction band valleys in AlAS due to XX-XY mixing
AU - Hyunsik, Im
AU - Klipstein, P. C.
AU - Grey, R.
AU - Hill, G.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - We report resonant magnetotunneling measurements of the energy dispersion near the third X symmetry subband edge in 60 and 70 Å thick AlAs quantum wells with GaAs barriers, grown along z = [001]. An elliptical constant energy surface is observed, oriented parallel to either [110] or [1̄10]. This rotation of 45° with respect to the bulk AlAs Fermi surface is explained by interface induced XX-XY mixing. Our results provide new insight into both γ-XZ and XX-XY mixing, showing conclusively that states with both X1 and X3 symmetry contribute. This contrasts with several recent theoretical studies in which the X1 contribution is zero.
AB - We report resonant magnetotunneling measurements of the energy dispersion near the third X symmetry subband edge in 60 and 70 Å thick AlAs quantum wells with GaAs barriers, grown along z = [001]. An elliptical constant energy surface is observed, oriented parallel to either [110] or [1̄10]. This rotation of 45° with respect to the bulk AlAs Fermi surface is explained by interface induced XX-XY mixing. Our results provide new insight into both γ-XZ and XX-XY mixing, showing conclusively that states with both X1 and X3 symmetry contribute. This contrasts with several recent theoretical studies in which the X1 contribution is zero.
UR - http://www.scopus.com/inward/record.url?scp=17944403020&partnerID=8YFLogxK
U2 - 10.1103/physrevlett.83.3693
DO - 10.1103/physrevlett.83.3693
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AN - SCOPUS:17944403020
SN - 0031-9007
VL - 83
SP - 3693
EP - 3696
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
ER -