Negative temperature coefficient of resistance in a crystalline compoundAbhishek Pandey, Chandan Mazumdar, R. Ranganathan, Molly De Raychaudhury, T. Saha-Dasgupta, Saurabh Tripathi, Dhananjai Pandey and S. DattaguptaEPL, 84 4 (2008) 47007DOI: https://doi.org/10.1209/0295-5075/84/47007