منابع مشابه
on the effect of linear & non-linear texts on students comprehension and recalling
چکیده ندارد.
15 صفحه اولDynamics of Coupled Quantum Spin Chains.
Static and dynamical properties of weakly coupled antiferromagnetic spin chains are treated using a mean–field approximation for the interchain coupling and exact results for the resulting effective one–dimensional problem. Results for staggered magnetization, Néel temperature and spin wave excitations are in agreement with experiments on KCuF3. The existence of a narrow longitudinal mode is pr...
متن کاملDynamics of weakly coupled random antiferromagnetic quantum spin chains
We study the low-energy collective excitations and dynamical response functions of weakly coupled random antiferromagnetic spin-1 /2 chains. The interchain coupling leads to Néel order at low temperatures. We use the real-space renormalization-group technique to tackle the intrachain couplings and treat the interchain couplings within the random phase approximation RPA . We show that the system...
متن کاملDeterministic escape dynamics of two-dimensional coupled nonlinear oscillator chains.
We consider the deterministic escape dynamics of a chain of coupled oscillators under microcanonical conditions from a metastable state over a cubic potential barrier. The underlying dynamics is conservative and noise free. We introduce a two-dimensional chain model and assume that neighboring units are coupled by Morse springs. It is found that, starting from a homogeneous lattice state, due t...
متن کاملRaman scattering of linear chains of strongly coupled Ag nanoparticles on SWCNTs
We compare the Raman scattering properties of hybrid nanostructures consisting of Ag nanoparticles (NPs) in disordered and aligned arrangements on single-walled carbon nanotubes (SWCNTs) as a result of chemical and photoreduction methods. In the latter case, the unique structure of the very small Ag NP (from 4 to 7 nm) chains generated an extremely large mode at 969 cm(-1) that was assigned to ...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1978
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.59.2181