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Pseudo-spin-gap of La2− xSrxCuO4

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/j.physc.2003.11.076
Keywords
  • Nuclear Quadrupole Resonance
  • Nuclear Spin–Lattice Relaxation
  • Pseudo-Spin-Gap
  • La2− Xsrxcuo4
Disciplines
  • Physics

Abstract

Abstract We revisited the Cu nuclear spin–lattice relaxation of 63Cu-enriched high- T c superconductors La 2− x Sr x CuO 4 with x=0.13 (an underdoped sample) and 0.18 (an overdoped sample). From application of the impurity-induced NMR relaxation theory, we observed a remnant of the pseudo-spin-gap effect on the host Cu nuclear spin–lattice relaxation rate 63(1/T 1T) host and the inhomogeneous slow fluctuation effect via the impurity-induced relaxation rate 63(1/τ 1) . The magnetic phase diagram with the pseudo-spin-gap temperatures T s is presented.

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