Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi$_{2}$Sr$_{2}$CaCu$_{2}$O$_{8+δ}$, Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements

Tomohiro Usui; Daiki Fujiwara; Shintaro Adachi; Hironobu Kudo; Kosuke Murata; Haruki Kushibiki; Takao Watanabe; Kazutaka Kudo; Terukazu Nishizaki; Norio Kobayashi; Shojiro Kimura; Kazuyoshi Yamada; Tomoyuki Naito; Takashi Noji; Yoji Koike

doi:10.7566/JPSJ.83.064713

paper

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ , Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements

arXiv:1404.4736 · doi:10.7566/JPSJ.83.064713

Abstract

To investigate the relationship between the pseudogap and superconductivity, we measured both the in-plane ( $ρ_{ab}$ ) and out-of-plane ( $ρ_{c}$ ) resistivity for oxygen-controlled Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ single crystals subject to magnetic fields (parallel to the $c$ axis) of up to 17.5 T. The onset temperature for the superconductive fluctuation, $T_{sc f}$ , is determined by the large positive in-plane magnetoresistance (MR) and negative out-of-plane MR observed near $T_{c}$ , whereas the pseudogap opening temperature $T^{*}$ is determined by the semiconductive upturn of the zero-field $ρ_{c}$ . $T_{sc f}$ was found to scale roughly as $T_{c}$ , with a decreasing temperature interval between them upon doping. On the other hand, $T^{*}$ starts out much higher than $T_{sc f}$ but decreases monotonically upon doping; finally, at a heavily overdoped state, it is not observed above $T_{sc f}$ . These results imply that the pseudogap is not a simple precursor of superconductivity, but that further study is needed to determine whether or not $T^{*}$ exists below $T_{sc f}$ in the heavily overdoped state.

17 pages, 7 figures, to appear in JPSJ

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ , Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements

Abstract

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Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi2​Sr2​CaCu2​O8+δ​, Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements

Abstract

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Cited by in corpus (6)

Doping Dependencies of Onset Temperatures for the Pseudogap and Superconductive Fluctuation in Bi $_{2}$ Sr $_{2}$ CaCu $_{2}$ O $_{8 + δ}$ , Studied from both In-Plane and Out-of-Plane Magnetoresistance Measurements