Hidden quantum spin-gap state in the static stripe phase of high-temperature La2-xSrxCuO4 superconductors

M. Kofu, S. H. Lee, M. Fujita, H. J. Kang, H. Eisaki, K. Yamada

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

Low-energy spin excitations were investigated in the static stripe phase of La2-xSrxCuO4 using elastic and inelastic neutron scattering on single crystals. For x=1/8 in which long-range static stripe order exists, an energy gap of Eg=4meV exists in the excitation spectrum in addition to strong quasielastic, incommensurate spin fluctuations associated with the static stripes. When x increases, the spectral weight of the spin fluctuations shifts from the quasielastic continuum to the excitation spectrum above Eg. The dynamic correlation length as a function of energy and the temperature evolution of the energy spectrum suggest a phase separation of two distinct magnetic phases in real space.

Original languageEnglish
Article number047001
JournalPhysical Review Letters
Volume102
Issue number4
DOIs
Publication statusPublished - 2009 Jan 26

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Hidden quantum spin-gap state in the static stripe phase of high-temperature La2-xSrxCuO4 superconductors'. Together they form a unique fingerprint.

Cite this