Crossover from superconductivity fluctuation to vortex picture in the vortex state of high-Tc cuprate superconductors

A. Maeda, T. Ohashi, H. Kitano, R. Tanaka, Y. Imai, I. Tsukada, M. Naito

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we introduce our recent results on superconductivity fluctuation measurement of high-Tc cuprate under finite magnetic field both for the hole-doped La2-xSrxCuO4 (LSCO) and the electron-doped La2-xCexCuO4 (LCCO). Under finite magnetic fields, the scaling relation was valid only for weak fields, and for higher fields, aspects as vortices appeared. However, even at low temperatures, just above the first-order phase transition of the vortex lattice, vortex picture alone cannot describe the data satisfactory. Thus, we need a unified theory for the description of a large superconductivity fluctuation under finite magnetic fields for high-Tc cuprates.

Original languageEnglish
Article number052146
JournalJournal of Physics: Conference Series
Volume150
Issue number5
DOIs
Publication statusPublished - 2009 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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