title: Shallow donor state due to nitrogen-hydrogen complex in diamond.
abstract: Based on an ab initio calculation, we propose a possible shallowing of a nitrogen (N) donor in diamond, in contrast to the traditional thinking that it is very deep. A complex defect of N and hydrogen (H), N-H-N, should be much shallower than an isolated N donor. A qualitative scenario for formation of the N-H-N defects is presented. The existence of this complex is strongly suggested by a recent discovery of a new muonium center in N-rich diamond.
authors.affiliation: Advanced Semiconductor Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, AIST Tsukuba Central 4, Tsukuba 305-8562, Japan.
authors.forename: Takehide
authors.initials: T
authors.lastname: Miyazaki
authors.forename: Hideyo
authors.initials: H
authors.lastname: Okushi
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Uda