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

研究成果: Article査読

41 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号047001
ジャーナルPhysical Review Letters
102
4
DOI
出版ステータスPublished - 2009 1 26

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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