title: Experimental confirmation of the predicted shallow donor hydrogen state in zinc oxide.
abstract: We confirm the recent prediction that interstitial protium may act as a shallow donor in zinc oxide, by direct spectroscopic observation of its muonium counterpart. On implantation into ZnO, positive muons--chemically analogous to protons in this context--form paramagnetic centers below about 40 K. The muon-electron contact hyperfine interaction, as well as the temperature and activation energy for ionization, imply a shallow level. Similar results for the cadmium chalcogenides suggest that such shallow donor states are generic to the II-VI compounds. The donor level depths should serve as a guide for the electrical activity of interstitial hydrogen.
authors: ISIS Facility, Rutherford Appleton Laboratory, Chilton OX11 0QX, UK.
authors: S F
authors: SF
authors: Cox
authors: E A
authors: EA
authors: Davis
authors: S P
authors: SP
authors: Cottrell
authors: P J
authors: PJ
authors: King
authors: J S
authors: JS
authors: Lord
authors: J M
authors: JM
authors: Gil
authors: H V
authors: HV
authors: Alberto
authors: R C
authors: RC
authors: Vilão
authors: J
authors: J
authors: Piroto Duarte
authors: N
authors: N
authors: Ayres de Campos
authors: A
authors: A
authors: Weidinger
authors: R L
authors: RL
authors: Lichti
authors: S J
authors: SJ
authors: Irvine