MBE growth and characterization of MgS-rich zinc-blende Zn xMg1-xS1-ySey alloys

Richard T. Moug; Christine Bradford; Damien Thuau; Arran Curran; Richard J. Warburton; Kevin A. Prior

MBE growth and characterization of MgS-rich zinc-blende Zn _xMg_1-xS_1-ySe_y alloys

Richard T. Moug
, Christine Bradford
, Damien Thuau
, Arran Curran
, Richard J. Warburton
, Kevin A. Prior

School of Engineering & Physical Sciences

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

Abstract

Samples containing ZnMgSSe alloy were grown by using molecular beam epitaxy at 240 °C and were analyzed by using X-ray interference. The alloy composition was found to be Zn_0.20Mg_0.80S _0.64Se_0.36. The surfaces of these layers were found to be extremely flat, unlike MgS layers of similar thickness grown under identical conditions, which show pronounced ridges. Structures with Zn _0.20Mg_0.80S_0.64Se_0.36 barriers were grown with ZnSe quantum wells and showed good quantum confinement with a sharp PL peak. Calculations of the phase stability of ZnMgSSe alloys suggest that an alloy of this composition should phase separate. However, samples with this composition are demonstrably single phase, and the discrepancy with the calculation can be removed if the enthalpy of formation of zinc-blende MgS is reduced by less than 2 % to -231 kJ mol^-1.

Original language	English
Pages (from-to)	3004-3006
Number of pages	3
Journal	Journal of the Korean Physical Society
Volume	53
Issue number	5 PART 2
Publication status	Published - Nov 2008

Keywords

Alloy stability
MgS
Quantum wells
RHEED
ZnMgSSe

Cite this

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title = "MBE growth and characterization of MgS-rich zinc-blende Zn xMg1-xS1-ySey alloys",

abstract = "Samples containing ZnMgSSe alloy were grown by using molecular beam epitaxy at 240 °C and were analyzed by using X-ray interference. The alloy composition was found to be Zn0.20Mg0.80S 0.64Se0.36. The surfaces of these layers were found to be extremely flat, unlike MgS layers of similar thickness grown under identical conditions, which show pronounced ridges. Structures with Zn 0.20Mg0.80S0.64Se0.36 barriers were grown with ZnSe quantum wells and showed good quantum confinement with a sharp PL peak. Calculations of the phase stability of ZnMgSSe alloys suggest that an alloy of this composition should phase separate. However, samples with this composition are demonstrably single phase, and the discrepancy with the calculation can be removed if the enthalpy of formation of zinc-blende MgS is reduced by less than 2 \% to -231 kJ mol-1.",

keywords = "Alloy stability, MgS, Quantum wells, RHEED, ZnMgSSe",

author = "Moug, \{Richard T.\} and Christine Bradford and Damien Thuau and Arran Curran and Warburton, \{Richard J.\} and Prior, \{Kevin A.\}",

year = "2008",

month = nov,

language = "English",

volume = "53",

pages = "3004--3006",

journal = "Journal of the Korean Physical Society",

issn = "0374-4884",

publisher = "Korean Physical Society",

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TY - JOUR

T1 - MBE growth and characterization of MgS-rich zinc-blende Zn xMg1-xS1-ySey alloys

AU - Moug, Richard T.

AU - Bradford, Christine

AU - Thuau, Damien

AU - Curran, Arran

AU - Warburton, Richard J.

AU - Prior, Kevin A.

PY - 2008/11

Y1 - 2008/11

N2 - Samples containing ZnMgSSe alloy were grown by using molecular beam epitaxy at 240 °C and were analyzed by using X-ray interference. The alloy composition was found to be Zn0.20Mg0.80S 0.64Se0.36. The surfaces of these layers were found to be extremely flat, unlike MgS layers of similar thickness grown under identical conditions, which show pronounced ridges. Structures with Zn 0.20Mg0.80S0.64Se0.36 barriers were grown with ZnSe quantum wells and showed good quantum confinement with a sharp PL peak. Calculations of the phase stability of ZnMgSSe alloys suggest that an alloy of this composition should phase separate. However, samples with this composition are demonstrably single phase, and the discrepancy with the calculation can be removed if the enthalpy of formation of zinc-blende MgS is reduced by less than 2 % to -231 kJ mol-1.

AB - Samples containing ZnMgSSe alloy were grown by using molecular beam epitaxy at 240 °C and were analyzed by using X-ray interference. The alloy composition was found to be Zn0.20Mg0.80S 0.64Se0.36. The surfaces of these layers were found to be extremely flat, unlike MgS layers of similar thickness grown under identical conditions, which show pronounced ridges. Structures with Zn 0.20Mg0.80S0.64Se0.36 barriers were grown with ZnSe quantum wells and showed good quantum confinement with a sharp PL peak. Calculations of the phase stability of ZnMgSSe alloys suggest that an alloy of this composition should phase separate. However, samples with this composition are demonstrably single phase, and the discrepancy with the calculation can be removed if the enthalpy of formation of zinc-blende MgS is reduced by less than 2 % to -231 kJ mol-1.

KW - Alloy stability

KW - MgS

KW - Quantum wells

KW - RHEED

KW - ZnMgSSe

UR - https://www.scopus.com/pages/publications/57349104755

M3 - Article

SN - 0374-4884

VL - 53

SP - 3004

EP - 3006

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 5 PART 2

ER -

MBE growth and characterization of MgS-rich zinc-blende Zn _xMg_1-xS_1-ySe_y alloys

Abstract

Keywords

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