Encontrados 5 documentos, a visualizar página 1 de 1
Muonium in nano-crystalline II-VI semiconductors
Houtepen, A. J.; Gil, J. M.; Lord, J. S.; Liljeroth, P.; Vanmaekelbergh, D.; Alberto, H. V.; Vilão, R. C.; Piroto Duarte, J.; Ayres de Campos, N.http://www.sciencedirect.com/science/article/B6TVH-4V2NP2J-Y/2/3738c97c2d99528da5d86b4865717938
Oxide muonics: A new compendium
Cox, S. F. J.; Lord, J. S.; Cottrell, S. P.; Gil, J. M.; Alberto, H. V.; Piroto Duarte, J.; Vilão, R. C.; Keeble, D. J.; Davis, E. A.; Keren, A.A new survey of muonium states brings the total of binary non-magnetic oxides studied to 30, with normal muonium--the interstitially trapped atomic state--found in 15 of these. The number of shallow-donor states of the type known in ZnO now also totals 15, but there are hints of several others. Tantalizingly, the shallow-donor and deep-atomic states are found to coexist in several of the candidate high-permitti...
Muonium diffusion dynamics in mercury oxide
Piroto Duarte, J.; Gil, J. M.; Alberto, H. V.; Vilão, R. C.; Weidinger, A.; Ayres de Campos, N.; Cox, S. F. J.; Lord, J. S.; Cottrell, S. P.The diffusion dynamics of the neutral muonium state found in HgO is addressed in this work. We propose a hopping model for the diffusion, and use it to analyse time-domain [mu]SR data. It is found that the diffusion is an incoherent quantum process, with an activation energy of 5.2(2) meV. The analysis also points to the anti-bonding site as the best-suited candidate for the muon's localisation. ; http://www...
g-Sign determination with circularly polarised RF fields
Lord, J. S.; Keren, A.; Vilão, R. C.We have used a pair of crossed coils to generate rotating RF fields for a muon spin resonance measurement by driving one of the two coils and adjusting the tuned frequencies and mutual coupling to give the required 90o phase shift. Fitting the measured impedance to an equivalent circuit model gives information on the rotating field. ; http://www.sciencedirect.com/science/article/B6TVH-4HYV078-R/1/73d52003e85...
Probing the shallow-donor muonium wave function in ZnO and CdS via transferred ...
Lord, J. S.; Cottrell, S. P.; King, P. J. C.; Alberto, H. V.; Ayres de Campos, N.; Gil, J. M.; Duarte, J. Piroto; Vilão, R. C.; Lichti, R. L.The assignment of muon spin rotation spectra to muonium counterparts of hydrogen shallow-donor states is reviewed in four II-VI widegap semiconductors, CdS, CdSe, CdTe and ZnO. The existence of extended electronic orbitals is argued from the muon-electron hyperfine parameters and supported by the new muon spin repolarization data for CdS and ZnO, characterizing the superhyperfine parameters on the sparse Cd and...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||