Fincher-Burke spin excitations and ωT scaling in insulating La1.95 Sr0.05 CuO4

Wei Bao, Y. Chen, K. Yamada, A. T. Savici, P. L. Russo, J. E. Lorenzo, J. H. Chung

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Insulating La1.95 Sr0.05 CuO4 shares with superconducting cuprates the same Fincher-Burke spin excitations, which usually are observed in itinerant antiferromagnets. The local spectral function satisfies ωT scaling above ∼16 K for this incommensurate insulating cuprate, together with previous results in commensurate insulating and incommensurate superconducting cuprates, further supporting the general prediction for square-lattice quantum spin S=12 systems. The width of incommensurate peaks in La1.95 Sr0.05 CuO4 scales to a similar finite value as at optimal doping, strongly suggesting that they are similarly distant from a quantum critical point. They might both be limited to a finite correlation length by partial spin-glass freezing.

Original languageEnglish
Article number180406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number18
DOIs
Publication statusPublished - 2007 Nov 28
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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