Skip to main content
placeholder image

Out-of-plane magnetoresistance of Bi2Sr2CaCu2O8+x single crystals: Probing the fluctuation-induced pseudogap in the density of states

Journal Article


Abstract


  • We report on measurements of the out-of-plane resistivity and magnetoresistance in the normal state region above the critical temperature Tc in optimally doped and overdoped Bi2Sr2CaCu2O8+x single crystals. The temperature dependence of the out-of-plane resistivity indicates thermally activated hopping of carriers over an interplane pseudogap. In the overdoped samples this behavior gradually changes to a metallic-like resistivity at higher temperatures. The out-of-plane magnetoresistance (measured with the magnetic field parallel to the current) is negative, indicating a shrinking of the pseudogap in magnetic fields. Our experimental results are in good accordance with a recent model for the reduction of the quasiparticle density of states due to condensation of quasiparticles into superconducting fluctuations. Such a fluctuation-induced pseudogap is expected to be suppressed in high magnetic fields according to a reduction of the in-plane fluctuation amplitude.

Publication Date


  • 1997

Citation


  • Heine, G., Lang, W., Wang, X. L., & Wang, X. Z. (1997). Out-of-plane magnetoresistance of Bi2Sr2CaCu2O8+x single crystals: Probing the fluctuation-induced pseudogap in the density of states. Physica C: Superconductivity and its Applications, 282-287(PART 3), 1561-1562. doi:10.1016/S0921-4534(97)00927-1

Scopus Eid


  • 2-s2.0-0031200322

Start Page


  • 1561

End Page


  • 1562

Volume


  • 282-287

Issue


  • PART 3

Abstract


  • We report on measurements of the out-of-plane resistivity and magnetoresistance in the normal state region above the critical temperature Tc in optimally doped and overdoped Bi2Sr2CaCu2O8+x single crystals. The temperature dependence of the out-of-plane resistivity indicates thermally activated hopping of carriers over an interplane pseudogap. In the overdoped samples this behavior gradually changes to a metallic-like resistivity at higher temperatures. The out-of-plane magnetoresistance (measured with the magnetic field parallel to the current) is negative, indicating a shrinking of the pseudogap in magnetic fields. Our experimental results are in good accordance with a recent model for the reduction of the quasiparticle density of states due to condensation of quasiparticles into superconducting fluctuations. Such a fluctuation-induced pseudogap is expected to be suppressed in high magnetic fields according to a reduction of the in-plane fluctuation amplitude.

Publication Date


  • 1997

Citation


  • Heine, G., Lang, W., Wang, X. L., & Wang, X. Z. (1997). Out-of-plane magnetoresistance of Bi2Sr2CaCu2O8+x single crystals: Probing the fluctuation-induced pseudogap in the density of states. Physica C: Superconductivity and its Applications, 282-287(PART 3), 1561-1562. doi:10.1016/S0921-4534(97)00927-1

Scopus Eid


  • 2-s2.0-0031200322

Start Page


  • 1561

End Page


  • 1562

Volume


  • 282-287

Issue


  • PART 3