Magnetic-susceptibility and specific-heat studies on the inhomogeneity of superconductivity in the underdoped La2-x SrxCuO 4

Tadashi Adachi, Keisuke Omori, Yoichi Tanabe, Yoji Koike

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The possible inhomogeneity of superconductivity has been investigated by means of bulk-sensitive probes, using La2-xSrxCuO 4 (LSCO) single crystals from the underdoped to optimally doped regime. Measurements of the magnetic susceptibility, x, on field cooling and specific heat have revealed that both the absolute value of x at 2 K, regarded as corresponding to the superconducting (SC) volume fraction in a sample, and the Sommerfeld constant, reflecting the density of states of quasiparticles at the Fermi level, exhibit significant dependence on x, namely, on the hole concentration. This is the first experimental work strongly suggesting that a phase separation into SC and normal-state regions takes place in the underodped regime of LSCO as well as in the overdoped regime.

Original languageEnglish
Article number114707
Journaljournal of the physical society of japan
Volume78
Issue number11
DOIs
Publication statusPublished - 2009 Nov

Keywords

  • LaSrCUo
  • Magnetic susceptibility
  • Phase separation
  • Sommerfeld constant
  • Specific heat
  • Superconducting volume fraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Magnetic-susceptibility and specific-heat studies on the inhomogeneity of superconductivity in the underdoped La<sub>2-x</sub> Sr<sub>x</sub>CuO <sub>4</sub>'. Together they form a unique fingerprint.

Cite this