Muonium acceptor states in high GeSi1 - x Gex alloys

B. R. Carroll; R. L. Lichti; P. J.C. King; Y. G. Celebi; I. Yonenaga; K. H. Chow

doi:10.1016/j.physb.2008.11.165

Muonium acceptor states in high GeSi_{1 - x} Ge_x alloys

B. R. Carroll, R. L. Lichti, P. J.C. King, Y. G. Celebi, I. Yonenaga, K. H. Chow

Materials Design Division

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

9 Citations (Scopus)

Abstract

Muon spin rotation and resonance studies of Czochralski-grown silicon germanium alloys with high Ge content have determined muonium (Mu) donor and acceptor energy levels. High-TF and RF μSR measurements on 90% and 84% Ge content SiGe alloys show Mu acceptor energy levels of 13.5 ± 5.2 and 77 ± 12 meV, respectively, as well as a split tetrahedral Mu hyperfine signal. In addition to observing two Mu_T states in these samples, we see in Si_0.16 Ge_0.84 a possible shallow acceptor signal in our transverse field data as a time-delayed process most likely arising from neutral Mu states. Our fits obtain a relaxing diamagnetic signal that shows bond-centered Mu ionization above 150 K and a shallow signal below roughly 50 K, split ± 80 kHz from diamagnetic Mu.

Original language	English
Pages (from-to)	812-815
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	404
Issue number	5-7
DOIs	https://doi.org/10.1016/j.physb.2008.11.165
Publication status	Published - 2009 Apr 15

Keywords

Hydrogen
Muonium
Silicon germanium alloys

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2008.11.165

Cite this

@article{bdbd06650c23426391339eb1f9b9e3c8,

title = "Muonium acceptor states in high GeSi1 - x Gex alloys",

abstract = "Muon spin rotation and resonance studies of Czochralski-grown silicon germanium alloys with high Ge content have determined muonium (Mu) donor and acceptor energy levels. High-TF and RF μSR measurements on 90% and 84% Ge content SiGe alloys show Mu acceptor energy levels of 13.5 ± 5.2 and 77 ± 12 meV, respectively, as well as a split tetrahedral Mu hyperfine signal. In addition to observing two MuT states in these samples, we see in Si0.16 Ge0.84 a possible shallow acceptor signal in our transverse field data as a time-delayed process most likely arising from neutral Mu states. Our fits obtain a relaxing diamagnetic signal that shows bond-centered Mu ionization above 150 K and a shallow signal below roughly 50 K, split ± 80 kHz from diamagnetic Mu.",

keywords = "Hydrogen, Muonium, Silicon germanium alloys",

author = "Carroll, {B. R.} and Lichti, {R. L.} and King, {P. J.C.} and Celebi, {Y. G.} and I. Yonenaga and Chow, {K. H.}",

note = "Funding Information: We greatly appreciate both the ISIS and the TRIUMF facilities for experiment time and assistance. Our μ SR studies were supported by the National Science Foundation [RLL], the Welch Foundation [RLL], the Natural Sciences and Engineering Research Council of Canada [KHC] and the Science and Technology Facilities Council of UK [PJCK].",

year = "2009",

month = apr,

day = "15",

doi = "10.1016/j.physb.2008.11.165",

language = "English",

volume = "404",

pages = "812--815",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "5-7",

}

TY - JOUR

T1 - Muonium acceptor states in high GeSi1 - x Gex alloys

AU - Carroll, B. R.

AU - Lichti, R. L.

AU - King, P. J.C.

AU - Celebi, Y. G.

AU - Yonenaga, I.

AU - Chow, K. H.

N1 - Funding Information: We greatly appreciate both the ISIS and the TRIUMF facilities for experiment time and assistance. Our μ SR studies were supported by the National Science Foundation [RLL], the Welch Foundation [RLL], the Natural Sciences and Engineering Research Council of Canada [KHC] and the Science and Technology Facilities Council of UK [PJCK].

PY - 2009/4/15

Y1 - 2009/4/15

N2 - Muon spin rotation and resonance studies of Czochralski-grown silicon germanium alloys with high Ge content have determined muonium (Mu) donor and acceptor energy levels. High-TF and RF μSR measurements on 90% and 84% Ge content SiGe alloys show Mu acceptor energy levels of 13.5 ± 5.2 and 77 ± 12 meV, respectively, as well as a split tetrahedral Mu hyperfine signal. In addition to observing two MuT states in these samples, we see in Si0.16 Ge0.84 a possible shallow acceptor signal in our transverse field data as a time-delayed process most likely arising from neutral Mu states. Our fits obtain a relaxing diamagnetic signal that shows bond-centered Mu ionization above 150 K and a shallow signal below roughly 50 K, split ± 80 kHz from diamagnetic Mu.

AB - Muon spin rotation and resonance studies of Czochralski-grown silicon germanium alloys with high Ge content have determined muonium (Mu) donor and acceptor energy levels. High-TF and RF μSR measurements on 90% and 84% Ge content SiGe alloys show Mu acceptor energy levels of 13.5 ± 5.2 and 77 ± 12 meV, respectively, as well as a split tetrahedral Mu hyperfine signal. In addition to observing two MuT states in these samples, we see in Si0.16 Ge0.84 a possible shallow acceptor signal in our transverse field data as a time-delayed process most likely arising from neutral Mu states. Our fits obtain a relaxing diamagnetic signal that shows bond-centered Mu ionization above 150 K and a shallow signal below roughly 50 K, split ± 80 kHz from diamagnetic Mu.

KW - Hydrogen

KW - Muonium

KW - Silicon germanium alloys

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