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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2010 Volume 92, Issue 3, Pages 172–176 (Mi jetpl1374)

This article is cited in 9 papers

CONDENSED MATTER

Critical dynamics and relaxation of elementary excitations of the nematic phase of a non-heisenberg magnet with spin $S=1$

V. I. Butrima, B. A. Ivanovbc, A. S. Kuznetsova

a Vernadskiy Tavricheskiy National University, Simferopol, Ukraine
b National Taras Shevchenko University of Kyiv
c Institute of Magnetism, National Academy of Sciences of Ukraine

Abstract: The relaxation of elementary excitations (magnons) in the nematic phase of a magnet with spin $S=1$ at the critical point of the nematic-to-ferromagnetic phase transition has been studied. Magnons in a three-dimen-sional nematic at the critical point have all of the properties of Goldstone excitations; in particular, their damping decrement tends to zero faster than the excitation frequency as the wave vector tends to zero. In the two-dimensional case, the ratio of the damping decrement to the frequency is small in the long-wavelength limit. The similarity between the behaviors of magnons in the spin nematic and in the isotropic Heisenberg ferromagnet has been underlined.

Received: 09.06.2010


 English version:
Journal of Experimental and Theoretical Physics Letters, 2010, 92:3, 151–155

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