Submitted on: 30 May 2022.
Revised on: 13 July 2022.
Accepted on: 24 July 2022.
Materials Today Physics
Submitted on: 19 July 2007.
Revised on: 05 August 2007.
Accepted on: 10 August 2007.
Materials Today Physics---ELSEVIER
Submitted on: 07 January 2002.
Revised on: 23 January 2002.
Accepted on: 06 February 2002.
Materials Today Physics
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http://reply.papertrans.cn/3/215/21407/21407-35.png
Submitted on: 29 February 2004.
Revised on: 20 March 2004.
Accepted on: 15 April 2004.
Materials Today Physics