On the Concentration Dependence of Wings of Spectra of Spin Correlation Functions of Diluted Heisenberg Paramagnets | Научно-инновационный портал СФУ

On the Concentration Dependence of Wings of Spectra of Spin Correlation Functions of Diluted Heisenberg Paramagnets

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1134/S0021364016110138

Аннотация: Singular points of the autocorrelation function on the imaginary time axis that is averaged over the location of spins in the magnetically dilute spin lattice with isotropic spin-spin interaction at a high temperature have been studied. For the autocorrelation function in the approximation of the self-consistent fluctuating local field, nonlinear integral equations have been proposed which reflect the separation of the inhomogeneous spin systems into close spins and other spins. The coordinates of the nearest singular points have been determined in terms of the radius of convergence of the expansion in powers of time, the coefficients of which have been calculated from recurrence equations. It has been shown that the coordinates of singular points and, consequently, the wings of the autocorrelation function spectrum at strong magnetic dilution are determined by the modulation of the local field by the nearest pairs of spins leading to its logarithmic concentration dependence.

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Издание

Журнал: JETP LETTERS

Выпуск журнала: Vol. 103, Is. 11

Номера страниц: 687-691

ISSN журнала: 00213640

Место издания: NEW YORK

Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER

Авторы

  • Zobov V.E. (Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia)
  • Kucherov M.M. (Siberian Fed Univ, Inst Space & Informat Technol, Krasnoyarsk 660074, Russia)

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