Rotation of the conduction band valleys in AlAS due to XX-XY mixing

Im Hyunsik; P. C. Klipstein; R. Grey; G. Hill

doi:10.1103/PhysRevLett.83.3693

Rotation of the conduction band valleys in AlAS due to X_X-X_Y mixing

Im Hyunsik
, P. C. Klipstein
, R. Grey
, G. Hill

Division of System Semiconductor

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

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 X_X-X_Y mixing. Our results provide new insight into both γ-X_Z and X_X-X_Y 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.

Original language	English
Pages (from-to)	3693-3696
Number of pages	4
Journal	Physical Review Letters
Volume	83
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.83.3693
State	Published - 1 Jan 1999

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10.1103/PhysRevLett.83.3693

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title = "Rotation of the conduction band valleys in AlAS due to XX-XY mixing",

abstract = "We report resonant magnetotunneling measurements of the energy dispersion near the third X symmetry subband edge in 60 and 70 {\AA} thick AlAs quantum wells with GaAs barriers, grown along z = [001]. An elliptical constant energy surface is observed, oriented parallel to either [110] or [{\=1}10]. 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.",

author = "Im Hyunsik and Klipstein, \{P. C.\} and R. Grey and G. Hill",

year = "1999",

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doi = "10.1103/PhysRevLett.83.3693",

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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 - https://www.scopus.com/pages/publications/17944403020

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DO - 10.1103/PhysRevLett.83.3693

M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

ER -

Rotation of the conduction band valleys in AlAS due to X_X-X_Y mixing

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