- Email: [email protected]
Erratum to “Optical absorption of a Li-related impurity in ZnO”
ARTICLE IN PRESS
Physica B 351 (2004) 227
Erratum
Erratum to ‘‘Optical absorption of a Li-related impurity in ZnO’’$ Deirdre Mc Cabea, Karl Johnstona,*, Martin O. Henrya, Enda Mc Glynna, Eduardo Alvesb, J. John Daviesc a
School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland b Instituto Technolo´gico e Nuclear, P.O. Box 21, 2686-953 Sacave´m, Portugal c Department of Physics, University of Bath, Bath BA2 7AY, UK Received 10 May 2004; accepted 14 June 2004
In our paper [1] we reported absorption associated with Li in ZnO which occurs at 1.884 and 1:879 eV (15193.5 and 15153:2 cm1 ). This absorption was observed in samples that had been intentionally doped with Li and also with ion implantations of isotopically pure Li (6 Li; 7 Li; 6þ7 Li), and an associated isotope shift appeared to confirm the attribution. In particular, the line broadening associated with the mixed isotope implantations gave considerable confidence. However, it has since been found that the spectrometer on which the PL measurements were made was faulty at the time the measurements were made. The central belt drive was found to be slipping which resulted in misleading spectra. Unfortunately that the nature of the slippage resulted in lines with apparent positions and linewidths consistent with an isotope shift. Recent measurements do not produce any proof of Li involvement.
It should be pointed that the ODMR work also reported in the paper holds true: Li is present in the sample as described by Cox et al. [2]. Therefore, although the possibility remains that the absorption originates from Li, the confidence of the previous claim to chemical identification does not. In the paper we noted that the lines are close to several in the region of 15140 cm1 reported by Anderson for ZnO:Ni [3]. Further measurements are being undertaken to establish if there is any involvement of Ni in the lines we observe.
References [1] D.A. McCabe, K. Johnston, M.O. Henry, E. McGlynn, E. Alves, J.J. Davies, Physica B 340–342 (2003) 225. [2] R.T. Cox, D. Block, A. Herv!e, R. Picard, C. Santier, Solid State Commun. 25 (2) (1978) 77. [3] R.S. Anderson, Phys. Rev. 164 (2) (1967) 398.
$
doi of original article 10.1016/j.physb.2003.09.020. *Corresponding author. Tel.: +353-86-170-5550; fax: +3531-700-5382. E-mail address: [email protected] (K. Johnston). 0921-4526/$ - see front matter r 2004 Elsevier B.V. All rights reserved. doi:10.1016/j.physb.2004.06.012
Physica B 351 (2004) 227
Erratum
Erratum to ‘‘Optical absorption of a Li-related impurity in ZnO’’$ Deirdre Mc Cabea, Karl Johnstona,*, Martin O. Henrya, Enda Mc Glynna, Eduardo Alvesb, J. John Daviesc a
School of Physical Sciences, Dublin City University, Collins Avenue, Glasnevin, Dublin 9, Ireland b Instituto Technolo´gico e Nuclear, P.O. Box 21, 2686-953 Sacave´m, Portugal c Department of Physics, University of Bath, Bath BA2 7AY, UK Received 10 May 2004; accepted 14 June 2004
In our paper [1] we reported absorption associated with Li in ZnO which occurs at 1.884 and 1:879 eV (15193.5 and 15153:2 cm1 ). This absorption was observed in samples that had been intentionally doped with Li and also with ion implantations of isotopically pure Li (6 Li; 7 Li; 6þ7 Li), and an associated isotope shift appeared to confirm the attribution. In particular, the line broadening associated with the mixed isotope implantations gave considerable confidence. However, it has since been found that the spectrometer on which the PL measurements were made was faulty at the time the measurements were made. The central belt drive was found to be slipping which resulted in misleading spectra. Unfortunately that the nature of the slippage resulted in lines with apparent positions and linewidths consistent with an isotope shift. Recent measurements do not produce any proof of Li involvement.
It should be pointed that the ODMR work also reported in the paper holds true: Li is present in the sample as described by Cox et al. [2]. Therefore, although the possibility remains that the absorption originates from Li, the confidence of the previous claim to chemical identification does not. In the paper we noted that the lines are close to several in the region of 15140 cm1 reported by Anderson for ZnO:Ni [3]. Further measurements are being undertaken to establish if there is any involvement of Ni in the lines we observe.
References [1] D.A. McCabe, K. Johnston, M.O. Henry, E. McGlynn, E. Alves, J.J. Davies, Physica B 340–342 (2003) 225. [2] R.T. Cox, D. Block, A. Herv!e, R. Picard, C. Santier, Solid State Commun. 25 (2) (1978) 77. [3] R.S. Anderson, Phys. Rev. 164 (2) (1967) 398.
$
doi of original article 10.1016/j.physb.2003.09.020. *Corresponding author. Tel.: +353-86-170-5550; fax: +3531-700-5382. E-mail address: [email protected] (K. Johnston). 0921-4526/$ - see front matter r 2004 Elsevier B.V. All rights reserved. doi:10.1016/j.physb.2004.06.012