Anti-renormalization of paramagnetic fluctuations in CsMnBr3

Boni P; Reich C; Roessli B; Rastelli E

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Anti-renormalization of paramagnetic fluctuations in CsMnBr3

机译：CsMnBr3中顺磁波动的反规范化

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The critical behavior of the spin-wave dispersion in the triangular antiferromagnet CsMnBr3 was investigated in the paramagnetic phase using inelastic neutron scattering. Unexpectedly, we find that the energy gap of the excitations increases with increasing temperature. This effect cannot be explained by perturbed spin wave theory taking only intra-chain exchange interactions into account. We speculate that a description of the spin dynamics in terms of an extension of an approach for an S = (1)/(2) model for a Heisenberg chain to S = (5)/(2) may be more appropriate to explain our results. (C) 2004 Elsevier B.V. All rights reserved.

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《Physica, B. Condensed Matter》 |2004年第3期|共4页
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Boni P; Reich C; Roessli B; Rastelli E;
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正文语种 eng
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low dimension; spin waves; phase transition; critical behavior; NEUTRON-SCATTERING; SPIN-WAVES; ANTIFERROMAGNET; ORDER;

机译：低尺寸;自旋波;相变;临界行为;中子散射;自旋波;反铁磁网;有序;

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2. Paramagnetic spin waves in the one‐dimensional antiferromagnet CsMnBr3 [J] . Journal of Applied Physics . 1984,第6期

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Anti-renormalization of paramagnetic fluctuations in CsMnBr3

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