Lifetime of magnetic excitations in supported ferromagnetic and antiferromagnetic spin-2 Heisenberg chains
نویسندگان
چکیده
J. P. Gauyacq1,* and N. Lorente2 1Institut des Sciences Moléculaires d’Orsay, ISMO, Unité mixte de recherches CNRS-Université Paris-Sud, UMR 8214, Bâtiment 351, Université Paris-Sud, 91405 Orsay Cedex, France 2Centre d’Investigació en Nanociéncia i Nanotecnologia (CSIC-ICN), Campus de la UAB, E-08193 Bellaterra, Spain (Received 21 September 2011; revised manuscript received 27 December 2011; published 16 March 2012)
منابع مشابه
Exact S Matrices for Integrable Quantum Spin Chains Luca
We begin with a review of the antiferromagnetic spin 1/2 Heisenberg chain. In particular, we show that the model has particle-like excitations with spin 1/2, and we compute the exact bulk S matrix. We then review our recent work which generalizes these results. We first consider an integrable alternating spin 1/2 spin 1 chain. In addition to having excitations with spin 1/2, this model also has...
متن کاملامواج اسپین و ناهمسانگردی تک جهتی در دولایهایهای نازک فرومغناطیسپادفرومغناطیسی
In this paper a simple model calculation of spin wave is given for the ferromagtic layer in ultra thin ferromagnetic/antiferromagnetic bilayer. In this model the magnetic layer is assumed as an isolated layer but the effect of antiferromagnetic layer on ferromagnetic layer and unidirectional anisotropy, is given in the effective field applied on each spin. The thin layer is assumed as two-dim...
متن کاملOrder from disorder in the double-exchange model
The magnetic excitations of the double-exchange (DE) model are usually discussed in terms of an equivalent ferromagnetic Heisenberg model. However this equivalence is valid only at a quasi-classical level—we show that both quantum and thermal corrections to the magnetic properties of the DE model differ from any effective Heisenberg model because its spin excitations interact only indirectly, t...
متن کاملExcitations in a four-leg antiferromagnetic Heisenberg spin tube.
Inelastic neutron scattering is used to investigate magnetic excitations in the quasi-one-dimensional quantum spin-liquid system Cu(2)Cl(4).D(8)C(4)SO(2). Contrary to previously conjectured models that relied on bond-alternating nearest-neighbor interactions in the spin chains, the dominant interactions are actually next-nearest-neighbor in-chain antiferromagnetic couplings. The appropriate Hei...
متن کاملWeakly Coupled Antiferromagnetic Quantum Spin Chains
Quasi-one-dimensional quantum antiferromagnets formed by a d-dimensional hypercubic lattice of weakly coupled spin-1/2 antiferromagnetic Heisenberg chains are studied by combining exact results in one-dimension and renormalization group analyses of the interchain correlations. It is shown that d-dimensional magnetic long-range order develops at zero-temperature for infinitesimal antiferromagnet...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2012