Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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.
Citation
Physical Review Letters
Volume
102

Keywords

high Tc superconductivity, low energy spin fluctuation, neutron scattering, quantum spin gap, spin stripe phase

Citation

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 April 19, 2024)
Created January 27, 2009, Updated March 18, 2024