Muonium donor in rutile TiO2 and comparison with hydrogen


Muonium, a positive muon and an electron, is often used as an experimentally accessible substitute for hydrogen in materials research. In semiconductors and insulators, a large amount of information on the hydrogen behavior is deduced from this analogy; however, it is seldom demonstrated that this procedure is justified. We show here, via a comparison of the hyperfine interactions, that in TiO2 muonium and hydrogen form the same configuration with the same basic electronic structure. A detailed description of the bonding characteristics of the muon to the Ti3+ polaron is presented. The special role of muon motion within the so-called oxygen channel in the rutile structure, which occurs at a lower temperature than for hydrogen, is emphasized.



subject category



Vilao, RC; Vieira, RBL; Alberto, HV; Gil, JM; Weidinger, A; Lichti, RL; Baker, BB; Mengyan, PW; Lord, JS

our authors


The technical help of the mu SR team at ISIS is gratefully acknowledged. This work was supported with funds from (i) FEDER (Programa Operacional Factores de Competitividade COMPETE) and from FCT-Fundacao para a Ciencia e Tecnologia under projects PEst-OE/FIS/UI0036/2014 and PTDC/FIS/102722/2008, (ii) European Commission under the 7th Framework Programme through the

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".