Negative temperature coefficient of resistance in a crystalline compound Abhishek Pandey, Chandan Mazumdar, R. Ranganathan, Molly De Raychaudhury, T. Saha-Dasgupta, Saurabh Tripathi, Dhananjai Pandey and S. Dattagupta EPL, 84 4 (2008) 47007 Published online: 17 November 2008 DOI: 10.1209/0295-5075/84/47007