Magnetic-Field Induced Superconductor-Insulator Transition in the La2-xSrxCuO4 System.

Field-induced thermal metal-to-insulator transition in underdoped LSCO

The transport of heat and charge in cuprates was measured in undoped and heavily-underdoped single crystal La2−xSrxCuO4+δ (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 m...

Transport studies of La2-xSrxCuO4 near the insulator-metal-superconductor transition.

Cuprates La2−xSrxCuO4 Studied by Angle-resolved Photoemission Spectroscopy

We have performed a systematic angle-resolved photoemission spectroscopy (ARPES) study of the high-Tc cuprates La2−xSrxCuO4, ranging from the underdoped insulator to the superconductor to the overdoped metal. We have revealed a systematic doping evolution of the band dispersions and (underlying) Fermi surfaces, pseudogap and quasi-particle features under the influence of strong electron-electro...

ARPES study on electronic evolution in Ca2 xNaxCuO2Cl2

Electronic evolution from an antiferromagnetic insulator to a high-Tc superconductor is revealed by angle-resolved photoemission spectroscopy experiments on tetragonal Ca2 xNaxCuO2Cl2 single crystals, which were grown for the first time under high pressures (6 5.5 GPa). In an underdoped superconductor (x 1⁄4 0:1), we found clear fingerprints of the parent magnetic insulator: a shadow band and a...

Field-Induced Thermal Metal-to-Insulator Transition in Underdoped La2 xSrxCuO4

Field-Induced Thermal Metal-to-Insulator Transition in Underdoped La2 xSrxCuO4 D. G. Hawthorn, R.W. Hill, C. Proust,* F. Ronning, Mike Sutherland, Etienne Boaknin, C. Lupien, M. A. Tanatar, Johnpierre Paglione, S. Wakimoto, H. Zhang, Louis Taillefer, T. Kimura, M. Nohara, H. Takagi, and N. E. Hussey Department of Physics, University of Toronto, Toronto, Ontario, Canada Department of Advanced Ma...