The transport of heat and charge in cuprates was measured in undoped and heavily-underdoped single crystal La_{2-x}Sr_xCuO_{4+delta} (LSCO). In underdoped LSCO, the thermal conductivity is found to decrease with increasing magnetic field in the T --> 0 limit, in striking contrast to the increase observed in all superconductors, including cuprates at higher doping. The suppression of superconductivity with magnetic field shows that a novel thermal metal-to-insulator transition occurs upon going from the superconducting state to the field-induced normal state.
@article{arxiv.cond-mat/0304495,
title = {Field-induced thermal metal-to-insulator transition in underdoped LSCO},
author = {D. G. Hawthorn and R. W. Hill and F. Ronning and Mike Sutherland and Etienne Boaknin and M. A. Tanatar and Johnpierre Paglione and S. Wakimoto and H. Zhang and Louis Taillefer},
journal= {arXiv preprint arXiv:cond-mat/0304495},
year = {2009}
}
Comments
2 pages, 2 figures, submitted to M2S-Rio 2003 Proceedings