Skip to main content
placeholder image

Role of the density-of-states superconducting fluctuations in the in-plane and out-of-plane transport properties of Bi2Sr2CaCu2O8+x single crystals

Journal Article


Abstract


  • We report transverse (B ⊥ j) and longitudinal (B∥j) in-plane (j∥ab-plane) and out-of-plane (j∥c-axis) magnetoresistance measurements on underdoped, optimally doped and overdoped Bi2Sr2CaCu2O8+x single crystals. The measurements were performed in the temperature range from slightly above Tc to 200 K and in magnetic fields up to 13 T. The in-plane magnetoresistance (MR) is positive for all temperatures, magnetic fields and different doping levels. Near Tc, the in-plane MR is dominated by thermodynamic fluctuations, but at higher temperatures a smooth transition to the MR of normal-state quasiparticles takes place. In sharp contrast, the out-of-plane MR is negative for all temperatures and orientations of the magnetic field. We interpret this unconventional behaviour in the framework of the superconducting fluctuation theory, taking into account different weights of the Aslamazov-Larkin and single-carrier density-of-states contributions.

Publication Date


  • 1999

Citation


  • Heine, G., Lang, W., Wang, X. L., & Dou, S. X. (1999). Role of the density-of-states superconducting fluctuations in the in-plane and out-of-plane transport properties of Bi2Sr2CaCu2O8+x single crystals. Physica C: Superconductivity and its Applications, 317-318, 596-599. doi:10.1016/S0921-4534(99)00139-2

Scopus Eid


  • 2-s2.0-0033131290

Start Page


  • 596

End Page


  • 599

Volume


  • 317-318

Abstract


  • We report transverse (B ⊥ j) and longitudinal (B∥j) in-plane (j∥ab-plane) and out-of-plane (j∥c-axis) magnetoresistance measurements on underdoped, optimally doped and overdoped Bi2Sr2CaCu2O8+x single crystals. The measurements were performed in the temperature range from slightly above Tc to 200 K and in magnetic fields up to 13 T. The in-plane magnetoresistance (MR) is positive for all temperatures, magnetic fields and different doping levels. Near Tc, the in-plane MR is dominated by thermodynamic fluctuations, but at higher temperatures a smooth transition to the MR of normal-state quasiparticles takes place. In sharp contrast, the out-of-plane MR is negative for all temperatures and orientations of the magnetic field. We interpret this unconventional behaviour in the framework of the superconducting fluctuation theory, taking into account different weights of the Aslamazov-Larkin and single-carrier density-of-states contributions.

Publication Date


  • 1999

Citation


  • Heine, G., Lang, W., Wang, X. L., & Dou, S. X. (1999). Role of the density-of-states superconducting fluctuations in the in-plane and out-of-plane transport properties of Bi2Sr2CaCu2O8+x single crystals. Physica C: Superconductivity and its Applications, 317-318, 596-599. doi:10.1016/S0921-4534(99)00139-2

Scopus Eid


  • 2-s2.0-0033131290

Start Page


  • 596

End Page


  • 599

Volume


  • 317-318