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most citedSubgraph Centrality in Complex Networks

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23 papers · 1 filter

cond-mat.soft2002

Surface phase transitions in polydisperse hard rod fluids

Y. Martinez-Raton

I study the effect of length polydispersity in the surface phase diagram of hard rods interacting with a hard wall. The properly extended interface Gibbs-Duhem equation for a polyd…

cond-mat.stat-mech2002★ 14 cited

Apparent phase transitions in finite one-dimensional sine-Gordon lattices

Saul Ares, Jose A. Cuesta, Angel Sanchez +1

We study the one-dimensional sine-Gordon model as a prototype of roughening phenomena. In spite of the fact that it has been recently proven that this model can not have any phase…

cond-mat.mtrl-sci2002★ 39 cited

Three eras of micellization

J. C. Neu, J. A. Cañizo, L. L. Bonilla

Micellization is the precipitation of lipids from aqueous solution into aggregates with a broad distribution of aggregation number. Three eras of micellization are characterized in…

cond-mat.stat-mech2002★ 33 cited

Exact Potts Model Partition Functions for Strips of the Triangular Lattice

Shu-Chiuan Chang, Jesper Lykke Jacobsen, Jesús Salas +1

We present exact calculations of the Potts model partition function Z(G,q,v) for arbitrary q and temperature-like variable v on n-vertex strip graphs G of the triangular lattice fo…

cond-mat.stat-mech2002★ 12 cited

Landau Expansion for the Critical Point of a Polydisperse System

C. Rascon, M. E. Cates

The effect of polydispersity on the phase diagram of a simple binary mixture is to split the binodal curve into cloud and shadow curves that cross at the critical point (which, in…

cond-mat2002★ 18 cited

Effects of epitaxial strain on the growth mechanism of YBa2Cu3O7-x thin films in [YBa2Cu3O7-x / PrBa2Cu3O7-x] superlattices

M. Varela, W. Grogger, D. Arias +6

We report on the growth mechanism of YBa2Cu3O7-x (YBCO). Our study is based on the analysis of ultrathin, YBa2Cu3O7-x layers in c-axis oriented YBa2Cu3O7-x / PrBa2Cu3O7-x superlatt…

math.DG2002

Global classification of generic multi-vector fields of top degree

David Martinez Torres

For any compact oriented manifold , we show that that the top degree multi-vector fields transverse to the zero section of are classified, up to orientat…

cond-mat.supr-con2002★ 15 cited

Direct Correlation between Tc and CuO2 Bilayer Spacing in YBa2Cu3O7-x

M. Varela, D Arias, Z. Sefrioui +4

We report the effects of epitaxial strain and deoxygenation on high quality [YBa2Cu3O7-x (YBCO)_N / PrBa2Cu3O7 (PBCO)_5] (1000 A thick) superlattices, with 1 <= N <= 12 unit cells.…

cond-mat.soft2002★ 46 cited

Enhancement by polydispersity of the biaxial nematic phase in a mixture of hard rods and plates

Yuri Martinez-Raton, Jose A. Cuesta

The phase diagram of a polydisperse mixture of uniaxial rod-like and plate-like hard parallelepipeds is determined for aspect ratios and 15. All particles have equal volume a…

cond-mat.soft2002

Pulse propagation in discrete systems of coupled excitable cells

A. Carpio, L. L. Bonilla

Propagation of pulses in myelinated fibers may be described by appropriate solutions of spatially discrete FitzHugh-Nagumo systems. In these systems, propagation failure may occur…

cond-mat.str-el2002★ 14 cited

Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping

Francisco Guinea, Robert S. Markiewicz, Maria A. H. Vozmediano

The Kohn-Luttinger mechanism for superconductivity is investigated in a model for the electron doped cuprates. The symmetry of the order parameter of the superconducting phase is d…

cond-mat.soft2002

Overcomplete free energy functional for D=1 particle systems with next neighbor interactions

Christian Tutschka, Jose A. Cuesta

We deduce an overcomplete free energy functional for D=1 particle systems with next neighbor interactions, where the set of redundant variables are the local block densities $\varr…

cond-mat.soft2002★ 43 cited

Fundamental measure theory for lattice fluids with hard core interactions

Luis Lafuente, Jose A. Cuesta

We present the extension of Rosenfeld's fundamental measure theory to lattice models by constructing a density functional for d-dimensional mixtures of parallel hard hypercubes on…

cond-mat.soft2002★ 57 cited

Close to the edge of Fundamental Measure Theory: density functional for hard sphere mixtures

Jose A. Cuesta, Yuri Martinez-Raton, Pedro Tarazona

We analyze the structure of the Fundamental Measure Theory for the free energy density functional of hard sphere mixtures. A comparative study of the different versions of the theo…

cond-mat.str-el2002★ 17 cited

Properties of electrons near a Van Hove singularity

M. A. H. Vozmediano, J. Gonzalez, F. Guinea +2

The Fermi surface of most hole-doped cuprates is close to a Van Hove singularity at the M point. A two-dimensional electronic system, whose Fermi surface is close to a Van Hove sin…

cond-mat.stat-mech2002

Regular binary thermal lattice-gases

Ronald Blaak, David Dubbeldam

We analyze the power spectrum of a regular binary thermal lattice gas in two dimensions and derive a Landau-Placzek formula, describing the power spectrum in the low-wavelength, lo…

cond-mat.mtrl-sci2002★ 34 cited

p-Type semiconducting properties in lithium-doped MgO single crystals

M. M. Tardio, R. Ramirez, R. Gonzalez +1

The phenomenally large enhancement in conductivity observed when Li-doped MgO crystals are oxidized at elevated temperatures was investigated by dc and ac electrical measurements i…

cond-mat.mes-hall2002★ 13 cited

Nonlinear stochastic discrete drift-diffusion theory of charge fluctuations and domain relocation times in semiconductor superlattices

L. L. Bonilla, O. Sanchez, J. Soler

A stochastic discrete drift-diffusion model is proposed to account for the effects of shot noise in weakly coupled, highly doped semiconductor superlattices. Their current-voltage…

cond-mat.stat-mech2002★ 8 cited

Effects of disorder on the wave front depinning transition in spatially discrete systems

A. Carpio, L. L. Bonilla, A. Luzon

Pinning and depinning of wave fronts are ubiquitous features of spatially discrete systems describing a host of phenomena in physics, biology, etc. A large class of discrete system…

cond-mat.mtrl-sci2002★ 48 cited

Wavefront depinning transition in discrete one-dimensional reaction-diffusion systems

A. Carpio, L. L. Bonilla

Pinning and depinning of wavefronts are ubiquitous features of spatially discrete systems describing a host of phenomena in physics, biology, etc. A large class of discrete systems…

cond-mat.mes-hall2002★ 28 cited

Motion of Wavefronts in Semiconductor Superlattices

A. Carpio, L. L. Bonilla, G. Dell'Acqua

An analysis of wavefront motion in weakly coupled doped semiconductor superlattices is presented. If a dimensionless doping is sufficiently large, the superlattice behaves as a dis…

cond-mat.mtrl-sci2002★ 7 cited

Axisymmetric pulse recycling and motion in bulk semiconductors

L. L. Bonilla, R. Escobedo, F. J. Higuera

The Kroemer model for the Gunn effect in a circular geometry (Corbino disks) has been numerically solved. The results have been interpreted by means of asymptotic calculations. Abo…

cond-mat.stat-mech2002★ 38 cited

A microscopic model for thin film spreading

Douglas B. Abraham, Rodolfo Cuerno, Esteban Moro

A microscopic, driven lattice gas model is proposed for the dynamics and spatio-temporal fluctuations of the precursor film observed in spreading experiments. Matter is transported…