Systematic NMR studies of high-Tc and two-leg spin-ladder systems

Y. Kitaoka, K. Magishi, S. Matsumoto, K. Ishida, S. Ohsugi, K. Asayama, M. Uehara, T. Nagata, Jun Akimitsu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We review systematic NMR studies on underdoped high-Tc, cuprates and two-leg spin-ladder systems, focusing on their spin gap and dynamics. The pressure-induced superconductivity was discovered in Sr14-xCaxCu24O41 comprising the quasi-one-dimensional S = 1/2 two-leg spin-ladder Cu2O3 planes. Remarkably, the new parent cuprate is the Mott insulator with the spin gap in contrast to the antiferromagnetic (AF) insulator for the high-Tc cuprates. From the Cu-NMR results in the ladder Cu2O3 plane on single crystals Sr14-xCaxCu24O41 with x = 9 (hereafter denoted as Ca9) and x = 11.5 (Ca11.5), it is shown that the spin gap, Δ = 510 K in the Sr14 is significantly reduced upon isovalent Ca substitution, but its magnitude remains nearly constant with Δ = 270 and 280 K for the Ca9 and Ca11.5, respectively. In T range of T ≥ Δ, the spin dynamics in carrier-doped two-leg spin-ladder systems are characterized by the behaviour similar to the S = 1/2 1D Heisenberg system. By contrast, the transport property shares a common feature, i.e, due to the spin-gap opening the charge transport is confined in the 2D CuO2 plane for underdoped high-Tc cuprates and in the quasi-1D ladder for spin-ladder compounds.

Original languageEnglish
Pages (from-to)487-492
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Volume177-181
Issue numberPART 1
Publication statusPublished - Jan 1998
Externally publishedYes

Fingerprint

Ladders
ladders
Nuclear magnetic resonance
nuclear magnetic resonance
cuprates
Spin dynamics
insulators
Superconductivity
Transport properties
Charge transfer
Substitution reactions
spin dynamics
Single crystals
superconductivity
transport properties
substitutes
single crystals

Keywords

  • High-Tcuprates
  • NMR
  • Quantum fluctuation
  • Spin gap
  • Spin ladder
  • Superconductivity

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Kitaoka, Y., Magishi, K., Matsumoto, S., Ishida, K., Ohsugi, S., Asayama, K., ... Akimitsu, J. (1998). Systematic NMR studies of high-Tc and two-leg spin-ladder systems. Journal of Magnetism and Magnetic Materials, 177-181(PART 1), 487-492.

Systematic NMR studies of high-Tc and two-leg spin-ladder systems. / Kitaoka, Y.; Magishi, K.; Matsumoto, S.; Ishida, K.; Ohsugi, S.; Asayama, K.; Uehara, M.; Nagata, T.; Akimitsu, Jun.

In: Journal of Magnetism and Magnetic Materials, Vol. 177-181, No. PART 1, 01.1998, p. 487-492.

Research output: Contribution to journalArticle

Kitaoka, Y, Magishi, K, Matsumoto, S, Ishida, K, Ohsugi, S, Asayama, K, Uehara, M, Nagata, T & Akimitsu, J 1998, 'Systematic NMR studies of high-Tc and two-leg spin-ladder systems', Journal of Magnetism and Magnetic Materials, vol. 177-181, no. PART 1, pp. 487-492.
Kitaoka Y, Magishi K, Matsumoto S, Ishida K, Ohsugi S, Asayama K et al. Systematic NMR studies of high-Tc and two-leg spin-ladder systems. Journal of Magnetism and Magnetic Materials. 1998 Jan;177-181(PART 1):487-492.
Kitaoka, Y. ; Magishi, K. ; Matsumoto, S. ; Ishida, K. ; Ohsugi, S. ; Asayama, K. ; Uehara, M. ; Nagata, T. ; Akimitsu, Jun. / Systematic NMR studies of high-Tc and two-leg spin-ladder systems. In: Journal of Magnetism and Magnetic Materials. 1998 ; Vol. 177-181, No. PART 1. pp. 487-492.
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