Charge-state transitions of muonium in germanium

Lichti, R.L.; Cox, S. F. J.; Chow, K. H.; Davis, E. A.; Estle, T. L.; Hitti, B.; Mytilineou, E.; Schwab, C.

doi:10.1103/physrevb.60.1734

Cited by 51 publications

(53 citation statements)

References 22 publications

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“…However, the rapid reactivity of hydrogen means that many of the techniques that are used to investigate hydrogen in semiconductors are not able to probe isolated H. Studies of muonium ͑Mu 0 = + e − ͒ using the muon spin rotation/relaxation/resonance ͑SR͒ techniques are now widely recognized to be the main experimental source of information on isolated H in many semiconductors. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Recall that the muon ͑ + ͒ is a radioactive particle with a lifetime of Ϸ2.2 s. It can be considered a pseudoisotope of hydrogen with Ϸ 1 9 th the mass of the proton, but is still much heavier than the electron ͑Ϸ200ϫ ͒. Hence, the electronic structures of Mu 0 and H 0 are very similar.…”

Section: Introductionmentioning

confidence: 99%

Optically induced dynamics of muonium centers in Si studied via their precession signatures

et al. 2008

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We studied the influence of the optical excitation on three muonium centers Mu T 0 , Mu BC 0 , and Mu BC + in high resistivity silicon. These investigations were carried out on the spin precession signature of each center as a function of temperature. It is found that photoexcitation resulted in significant enhancements of the depolarization rates of the precession signals as the three muonium centers underwent interactions with photogenerated free carriers. The results are described by a three-state model involving transitions between Mu T 0 , Mu BC 0 , and Mu BC + as well as spin exchange processes.

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Section: Introductionmentioning

confidence: 99%

Optically induced dynamics of muonium centers in Si studied via their precession signatures

et al. 2008

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“…In particular, whilst the Mu BC species is the more energetically stable in Si, Mu T being metastable, the state stabilities are much closer in Ge with Mu T possibly being the more stable. In Si, Mu BC ionises at around 150 K; in Ge signals from both paramagnetic centres disappear around 100 K, possibly owing to the onset of site interchange rather than ionisation due to the smaller energy difference between the two states [2].…”

Section: Introductionmentioning

confidence: 99%

Muonium hyperfine parameters in Si1−xGex alloys

King¹,

Lichti²,

Cottrell³

et al. 2006

Physica B: Condensed Matter

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“…Mu T 0 is highly mobile with a large and isotropic hyperfine interaction. The BC configuration is the stable ground state for neutral muonium over the full range of x [2]. Mu BC 0 has a small and highly anisotropic hyperfine interaction [2].…”

Section: Transition Dynamics For Mu Acceptor States In Si 1-x Ge X Almentioning

confidence: 99%

Transition dynamics for Mu acceptor states in Si1–xGex alloys

Jayarathna¹,

Lichti²,

Mengyan³

et al. 2014

AIP Conference Proceedings

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Quasiclassical trajectory (and variational transition state theory) study of the rates and temperature-dependent activation energies of the reactions Mu+H2 (completely thermal) and H, D, and Mu+H2 (v=0, j=2) Kinetic isotope effects in the Mu+H2 and Mu+D2 reactions: Accurate quantum calculations for the collinear reactions and variational transition state theory predictions for one and three dimensions Abstract. We use the longitudinal field muon spin relaxation technique to observe charge-state and site-change transitions of muonium in Si 1-x Ge x alloys. In this project, we examine the temperature and magnetic field dependences of the relaxation rates for Si 1-x Ge x samples (x = 0.77, 0.81, and 0.84), in the composition range where the acceptor level lies within the band gap. This study particularly focuses on the relaxation rates for Si 0.19 Ge 0.81 to identify various cyclic charge-state and site-change processes as a function of both temperature and magnetic field. We extract the paramagnetic hyperfine constant and the relevant transition rate parameters for site changes and charge-state transitions involving Mu acceptor states for this sample. At small x, a site change dominates the transition out of the neutral T-site acceptor state, while in higher Ge content alloys hole ionization becomes the dominant transition out of the Mu T 0 .

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Charge-state transitions of muonium in germanium

Cited by 51 publications

References 22 publications

Optically induced dynamics of muonium centers in Si studied via their precession signatures

Optically induced dynamics of muonium centers in Si studied via their precession signatures

Muonium hyperfine parameters in Si1−xGex alloys

Transition dynamics for Mu acceptor states in Si1–xGex alloys

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