Kofu, M.
, Lee, S.
, Fujita, M.
, Kang, H.
, Eisaki, H.
and Yamada, K.
(2009),
Hidden Quantum Spin-Gap State in the Static Stripe Phase of High-Temperature La 2 − x Sr x CuO 4 Superconductors, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.102.047001, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=610066
(Accessed October 14, 2025)
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Hidden Quantum Spin-Gap State in the Static Stripe Phase of High-Temperature La 2 − x Sr x CuO 4 Superconductors
Published
Author(s)
M. Kofu, S.-H. Lee, M Fujita, , H. Eisaki, K Yamada
Abstract
Low-energy spin excitations were investigated in the static stripe phase of La2−xSrxCuO4 sing 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=4 meV 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.Citation
Physical Review Letters
Volume
102
Pub Type
Journals
Download Paper
Keywords
high Tc superconductivity, low energy spin fluctuation, neutron scattering, quantum spin gap, spin stripe phase
Citation
Issues
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Created January 27, 2009, Updated March 18, 2024