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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2008, Volume 87, Issue 7, Pages 433–437 (Mi jetpl79)  

This article is cited in 3 scientific papers (total in 3 papers)

CONDENSED MATTER

Phenomenological approach to the non-spin-wave behavior of cuprate magnetic susceptibility in the superconducting state

A. F. Barabanova, L. A. Maksimovb

a Institute of High-Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow region, 142190, Russia
b Russian Research Centre Kurchatov Institute, pl. Kurchatova, Moscow, 123182, Russia
Full-text PDF (817 kB) Citations (3)
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Abstract: Experimental data on the non-spin-wave behavior of the cuprate magnetic susceptibility χ(q, ω) in the superconducting state are reconstructed on the basis of a spherically symmetric self-consistent approach within the framework of the frustrated Heisenberg model. For the Green’s function of the spin-wave excitations, a polarization operator resonant with the superconducting state is introduced phenomenologically. This gives rise to an additional (compared to the normal state) branch of the incommensurate peaks and to a pronounced non-spin-wave behavior of the susceptibility χ(q, ω) in the frequency range near 80 meV (the so-called “dark region”). The renormalization of the real part of the polarization operator plays a crucial role in the theory.
Received: 26.02.2008
English version:
Journal of Experimental and Theoretical Physics Letters, 2008, Volume 87, Issue 7, Pages 371–375
DOI: https://doi.org/10.1134/S0021364008070084
Bibliographic databases:
Document Type: Article
PACS: 71.27.+a, 74.72.-h, 75.20.-g
Language: Russian


Citation: A. F. Barabanov, L. A. Maksimov, “Phenomenological approach to the non-spin-wave behavior of cuprate magnetic susceptibility in the superconducting state”, Pis'ma v Zh. Èksper. Teoret. Fiz., 87:7 (2008), 433–437; JETP Letters, 87:7 (2008), 371–375
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