Theory of incommensurate magnetic correlations across the insulator-superconductor transition of underdoped La2-xSrxCuO4

The main feature in the elastic neutron scattering of La2-xSrxCuO4 is the existence of incommensurate peaks with positions that jump from 45 degrees to 0 degrees at 5% doping. We show that the spiral state of the t-t(')-t('')-J model with realistic parameters describes these data perf...

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Bibliographic Details
Published in:Physical review letters 2005-03, Vol.94 (9), p.097005.1-097005.4
Main Authors: SUSHKOV, Oleg P, KOTOV, Valeri N
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Superconductivity
Theory and models of superconducting state
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Summary:The main feature in the elastic neutron scattering of La2-xSrxCuO4 is the existence of incommensurate peaks with positions that jump from 45 degrees to 0 degrees at 5% doping. We show that the spiral state of the t-t(')-t('')-J model with realistic parameters describes these data perfectly. We explain why in the insulator the peak is at 45 degrees while it switches to 0 degrees precisely at the insulator-metal transition. The calculated positions of the peaks are in agreement with the data in both phases.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.94.097005