2004/09/30 by O. P. Sushkov, Oleg P. Sushkov, Valeri N. Kotov
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Magnetic and transport properties of perovskites and related materials #Physics #Physics of Superconductivity and Magnetism #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.94.097005
published as Phys. Rev. Lett. 94, 097005 (2005). · 5 pages, 1 figure; minor changes
arxiv created 2004/12/29 · openalex publication_date 2005/03/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The main feature in the elastic neutron scattering of La_2\ensuremath-xSrxCuO4 is the existence of incommensurate peaks with positions that jump from 45 \ifmmode^∘\else\textdegree\fi to 0 \ifmmode^∘\else\textdegree\fi at 5% doping. We show that the spiral state of the t\ensuremath-t^\ensuremath'\ensuremath-t^\ensuremath'\ensuremath'\ensuremath-J model with realistic parameters describes these data perfectly. We explain why in the insulator the peak is at 45 \ifmmode^∘\else\textdegree\fi while it switches to 0 \ifmmode^∘\else\textdegree\fi precisely at the insulator-metal transition. The calculated positions of the peaks are in agreement with the data in both phases.