Local vibrational modes of bond-centered H in 28Si,29Si, and 30Si crystals

Host Isotope Effect on the Local Vibration Modes of VH2 and VOH2 Defects in Isotopically Enriched 28Si, 29Si and 30Si Single Crystals

“…[10][11][12] When the mass of host silicon atoms is increased from 28 Si to 30 Si, the mode frequency changes in opposite directions for bond-center hydrogen and bond-center deuterium. 9) These results could be satisfactorily modeled only when anharmonic terms are included in the vibrational potential. 9) It is of great interest to extend such studies to other hydrogen-related defects in silicon where the bonding configurations and charge states are different from H BC þ .…”

“…9) These results could be satisfactorily modeled only when anharmonic terms are included in the vibrational potential. 9) It is of great interest to extend such studies to other hydrogen-related defects in silicon where the bonding configurations and charge states are different from H BC þ . Such complexes can be readily introduced into silicon by proton implantation or by electron irradiation of silicon containing hydrogen.…”

“…6,7) We took advantage of this and investigated the effect of host silicon isotopes on localized vibrational modes of oxygen 8) and hydrogen. 9) Among the new findings reported in these studies, the most notable results are found for positively charged bond-center hydrogen (H BC þ ), which is one of the most extensively studied hydrogen defects. [10][11][12] When the mass of host silicon atoms is increased from 28 Si to 30 Si, the mode frequency changes in opposite directions for bond-center hydrogen and bond-center deuterium.…”

Host isotope effects on midinfrared optical transitions in silicon

“…7,8 To date, the only measurements made on local vibrational modes have been on interstitial oxygen 9 and bond-centered hydrogen. 10 In Sec. III of this paper we present experimental data and quantitative analyses of the isotope dependence of some of the most common local vibrational modes observed in asgrown and electron-irradiated Czochralski silicon.…”

Host-isotope effect on the localized vibrational modes of oxygen dimer in isotopically enriched silicon

“…In order to overcome this limitation, we have grown nearly monoisotopic crystals of the three stable isotopes 28 Si, 29 Si, and 30 Si, and thereby added a new degree of freedom to LVM studies in silicon [5,6]. We took advantage of this in the past and investigated the effect of host silicon isotopes on LVMs of oxygen [7,8], carbon [8], and hydrogen [9]. The present study focuses on the host-isotope effect of silicon on the oxygen dimer LVMs since the oxygen dimer is one of the most extensively studied oxygen complexes as the first step for oxygen aggregations in the silicon thermal process [10][11][12][13][14][15][16].…”