Inelastic X-ray scattering measurements of III-V multiple quantum wells

Hongze Xia; Robert Patterson; Suntrana Smyth; Yu Feng; Simon Chung; Yi Zhang; Santosh Shrestha; Shujuan Huang; Hiroshi Uchiyama; Satoshi Tsutsui; Masakazu Sugiyama; Alfred Q. R. Baron; Gavin Conibeer

doi:10.1063/1.4974478

Inelastic X-ray scattering measurements of III-V multiple quantum wells

Hongze Xia^*, Robert Patterson, Suntrana Smyth, Yu Feng, Simon Chung, Yi Zhang, Santosh Shrestha, Shujuan Huang, Hiroshi Uchiyama, Satoshi Tsutsui, Masakazu Sugiyama, Alfred Q. R. Baron, Gavin Conibeer

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Inelastic X-ray scattering (IXS) on an In0.17 Ga0.83As/ GaAs0.8 P0.2 multiple quantum well (MQW) superlattice has been conducted to investigate the potential for phonon bottlenecks in low dimensional materials. This work shows that the measured spectra are in good agreement with an adiabatic bond charge model prediction and back-folded phonon modes make large contributions to the broadening of peaks observed in the spectra. The high-lying mode at 45 meV in the MQW is attributed to vibrations of Ga and P and confirmed by both experiment and theory. The acoustic phonons have a dominant contribution from the Ga and As components, and the contribution from InAs is small and only visible at around 29.7 meV. Low energy optical modes resulting from back-folding might be a key to increased electron-phonon coupling in the material system. The suitability of utilizing IXS as a means to investigate phonon modes in low dimensional materials is also discussed.

Original language	English
Article number	043102
Pages (from-to)	1-5
Number of pages	5
Journal	Applied Physics Letters
Volume	110
Issue number	4
DOIs	https://doi.org/10.1063/1.4974478
Publication status	Published - 23 Jan 2017
Externally published	Yes

Access to Document

10.1063/1.4974478

Cite this

@article{b1f8408a93134adba3c942cf3e5277e9,

title = "Inelastic X-ray scattering measurements of III-V multiple quantum wells",

abstract = "Inelastic X-ray scattering (IXS) on an In0.17 Ga0.83As/ GaAs0.8 P0.2 multiple quantum well (MQW) superlattice has been conducted to investigate the potential for phonon bottlenecks in low dimensional materials. This work shows that the measured spectra are in good agreement with an adiabatic bond charge model prediction and back-folded phonon modes make large contributions to the broadening of peaks observed in the spectra. The high-lying mode at 45 meV in the MQW is attributed to vibrations of Ga and P and confirmed by both experiment and theory. The acoustic phonons have a dominant contribution from the Ga and As components, and the contribution from InAs is small and only visible at around 29.7 meV. Low energy optical modes resulting from back-folding might be a key to increased electron-phonon coupling in the material system. The suitability of utilizing IXS as a means to investigate phonon modes in low dimensional materials is also discussed.",

author = "Hongze Xia and Robert Patterson and Suntrana Smyth and Yu Feng and Simon Chung and Yi Zhang and Santosh Shrestha and Shujuan Huang and Hiroshi Uchiyama and Satoshi Tsutsui and Masakazu Sugiyama and Baron, {Alfred Q. R.} and Gavin Conibeer",

year = "2017",

month = jan,

day = "23",

doi = "10.1063/1.4974478",

language = "English",

volume = "110",

pages = "1--5",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "4",

}

TY - JOUR

T1 - Inelastic X-ray scattering measurements of III-V multiple quantum wells

AU - Xia, Hongze

AU - Patterson, Robert

AU - Smyth, Suntrana

AU - Feng, Yu

AU - Chung, Simon

AU - Zhang, Yi

AU - Shrestha, Santosh

AU - Huang, Shujuan

AU - Uchiyama, Hiroshi

AU - Tsutsui, Satoshi

AU - Sugiyama, Masakazu

AU - Baron, Alfred Q. R.

AU - Conibeer, Gavin

PY - 2017/1/23

Y1 - 2017/1/23

N2 - Inelastic X-ray scattering (IXS) on an In0.17 Ga0.83As/ GaAs0.8 P0.2 multiple quantum well (MQW) superlattice has been conducted to investigate the potential for phonon bottlenecks in low dimensional materials. This work shows that the measured spectra are in good agreement with an adiabatic bond charge model prediction and back-folded phonon modes make large contributions to the broadening of peaks observed in the spectra. The high-lying mode at 45 meV in the MQW is attributed to vibrations of Ga and P and confirmed by both experiment and theory. The acoustic phonons have a dominant contribution from the Ga and As components, and the contribution from InAs is small and only visible at around 29.7 meV. Low energy optical modes resulting from back-folding might be a key to increased electron-phonon coupling in the material system. The suitability of utilizing IXS as a means to investigate phonon modes in low dimensional materials is also discussed.

AB - Inelastic X-ray scattering (IXS) on an In0.17 Ga0.83As/ GaAs0.8 P0.2 multiple quantum well (MQW) superlattice has been conducted to investigate the potential for phonon bottlenecks in low dimensional materials. This work shows that the measured spectra are in good agreement with an adiabatic bond charge model prediction and back-folded phonon modes make large contributions to the broadening of peaks observed in the spectra. The high-lying mode at 45 meV in the MQW is attributed to vibrations of Ga and P and confirmed by both experiment and theory. The acoustic phonons have a dominant contribution from the Ga and As components, and the contribution from InAs is small and only visible at around 29.7 meV. Low energy optical modes resulting from back-folding might be a key to increased electron-phonon coupling in the material system. The suitability of utilizing IXS as a means to investigate phonon modes in low dimensional materials is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=85010426624&partnerID=8YFLogxK

U2 - 10.1063/1.4974478

DO - 10.1063/1.4974478

M3 - Article

AN - SCOPUS:85010426624

SN - 0003-6951

VL - 110

SP - 1

EP - 5

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 4

M1 - 043102

ER -

Inelastic X-ray scattering measurements of III-V multiple quantum wells

Abstract

Access to Document

Other files and links

Fingerprint

Cite this