DST-DAAD faculty exchange programme at BESSY II synchrotron center, Berlin, Germany, Sept.17 - Dec. 8, 2001.

Visiting scientist at Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan, July 7 – Sept. 28, 2002.

Visiting professor at Global Center of Excellence (Global COE) programme at Kyoto University, Japan, March 15 – 31, 2008.

Visiting professor at Global Center of Excellence (Global COE) programme at Kyoto University, Japan, December 1 – 15, 2008.

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