Výsledky vyhledávání

Report

Magnetothermal Conductivity of Highly Oriented Pyrolytic Graphite in the Quantum Limit

Autor: Ocaña, R., Esquinazi, P., Kempa, H., Torres, J. H. S., Kopelevich, Y.

We report on the magnetic field (0T$ \le B \le 9$T) dependence of the longitudinal thermal conductivity $\kappa(T,B)$ of highly oriented pyrolytic graphite in the temperature range 5 K $\le T\le$ 20 K for fields parallel to the $c-$axis. We show that

Externí odkaz: http://arxiv.org/abs/cond-mat/0309129

Zobrazit plný text záznamu

Report

Metal-Insulator-Metal Transitions, Superconductivity and Magnetism in Graphite

Autor: Kopelevich, Y., Esquinazi, P., Torres, J. H. S., da Silva, R. R., Kempa, H., Mrowka, F., Ocana, R.

Publikováno v: Studies of High Temperature Superconductors, Vol. 45, pp. 59-106 (2003), ed. A. Narlikar

This article reviews recent results of magnetotransport and magnetization measurements performed on highly oriented pyrolitic graphite (HOPG) and single crystalline Kish graphite samples. Both metal-insulator and insulator-metal transitions driven by

Externí odkaz: http://arxiv.org/abs/cond-mat/0209442

Zobrazit plný text záznamu

Report

Angle Dependence of the Transverse Thermal Conductivity in YBa$_2$Cu$_3$O$_7$ single crystals: Doppler Effect vs. Andreev scattering

Autor: Ocaña, R., Esquinazi, P.

Publikováno v: Phys. Rev. Lett. 87, 167006-1 (2001)

We have measured the transverse thermal conductivity $\kappa_{xy}$ of twinned and untwinned YBa$_2$Cu$_3$O$_7$ single crystals as a function of angle $\theta$ between the magnetic field applied parallel to the CuO$_2$ planes and the heat current dire

Externí odkaz: http://arxiv.org/abs/cond-mat/0104326

Zobrazit plný text záznamu

Report

Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa$_{2}$Cu$_{3}$O$_{6.95}$ Single Crystal

Autor: Ocaña, R., Taldenkov, A., Esquinazi, P., Kopelevich, Y.

We have performed high-resolution measurements of the magnetic field (0~T~$ \le B \le 9~$T) and temperature (10 K~$\le T < 140~$K) dependence of the longitudinal and transverse Hall thermal conductivity of a twinned YBa$_{2}$Cu$_{3}$O$_{6.95}$ single

Externí odkaz: http://arxiv.org/abs/cond-mat/0004067

Zobrazit plný text záznamu