Spin susceptibility of cuprates in the model of a 2D frustrated antiferromagnet: Role of renormalization of spin fluctuations in describing neutron experiments
Experimental data on the spin susceptibility of HTSC cuprates are reproduced on the basis of a spherically symmetric approach in the frustrated Heisenberg model. The inclusion of real and imaginary renormalizations in spin Green's functions makes it possible to explain the evolution of spin excitation spectrum {omega}(q) and susceptibility spectrum {chi}(q, {omega}) in the range from insulator to optimal doping. In the low-frustration limit corresponding to the weakly doped mode, the saddle singularity of {omega}(q) and scaling of {chi}{sub 2D}({omega}) ={integral}dq Im {chi}(q, {omega}) are reproduced and an analytic expression is derived for the scaling function. In the strong frustration (optimal doping) mode, the stripe scenario is demonstrated; this leads to a peak of {chi}{sub 2D} ({omega}) in the region of {omega}{approx}60 meV.
- OSTI ID:
- 21075730
- Journal Information:
- Journal of Experimental and Theoretical Physics, Vol. 105, Issue 2; Other Information: DOI: 10.1134/S1063776107080079; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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