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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, Hye J. Kang, 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.
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)