Theoretical and Computational Physics

Basic Concepts and Relations Lattice Specific Heat Electronic Specific Heat Specific Heat of Cryogenic Liquids Specific Heat Anomalies Magnetic Specific Heat Experimental Methods.

Using spin-wave and random-phase-approximation expressions for the dynamic spin susceptibility of a two-dimensional ${\mathrm{CuO}}_{2}$ lattice, we have calculated the NMR Knight shifts K and spin-relaxation rates ${T}_{1}^{\mathrm{\ensuremath{-}}1}$ at various nuclear sites for the insulating and metallic phases. Ou…

• NEJAT BULUT

We have investigated the melting behavior of thin lead wires using molecular dynamics. We find that---in analogy with cluster melting---the melting temperature ${\mathit{T}}_{\mathit{m}}$(R) of a wire with radius R is lower than that of a bulk solid ${\mathit{T}}_{\mathit{m}}^{\mathit{b}}$ by ${\mathit{T}}_{\mathit{m}…

Systems with quasiperiodic disorder are known to exhibit a localization transition in low dimensions. After a critical strength of disorder, all the states of the system become localized, thereby ceasing the particle motion in the system. However, in our analysis, we show that in a one-dimensional dimerized lattice wi…

Using a random-phase-approximation expression to approximate the dynamic susceptibility \ensuremath{\chi}(q,\ensuremath{\omega}) of a 2D Hubbard model, we have calculated the spin-relaxation rates and the neutron-scattering intensity. Here, using recent static magnetic measurements to set parameters which enter the hy…

• NEJAT BULUT

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• NUMAN ŞARLI

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• BAYRAM DEVİREN

Previous work on the modeling of normal-state spin fluctuations in ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ is extended to the superconducting state. In this paper the effect of superconductivity on the spin fluctuations is approximately treated by using the BCS result for the irreducible susceptibili…

• NEJAT BULUT

We have performed multicanonical simulations of hydrophobic-hydrophilic heteropolymers with two simple effective, coarse-grained off-lattice models to study the influence of specific interactions in the models on conformational transitions of selected sequences with 20 monomers. Another aspect of the investigation was…

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• RESUL ERYİĞİT

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• MEHMET ERYİĞİT

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• YUSUF YÜKSEL