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

25 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

Access to Document

10.1103/PhysRevLett.83.3693

Cite this

@article{d8680dd5847046f0b2addd3f02b3e775,

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",

month = jan,

day = "1",

doi = "10.1103/PhysRevLett.83.3693",

language = "English",

volume = "83",

pages = "3693--3696",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "18",

}

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

M3 - Article

AN - SCOPUS:17944403020

SN - 0031-9007

VL - 83

SP - 3693

EP - 3696

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

Abstract

Access to Document

Other files and links

Fingerprint

Cite this