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15 papers · 1 filter
Metal-Semiconductor Transition and Fermi Velocity Renormalization in Metallic Carbon Nanotubes
Yan Li, Slava V. Rotkin, Umberto Ravaioli
Angular perturbations modify the band structure of armchair (and other metallic) carbon nanotubes by breaking the tube symmetry and may induce a metal-semiconductor transition when…
Primary Photoexcitations and the Origin of the Photocurrent in Rubrene Single Crystals
Hikmat Najafov, Ivan Biaggio, Vitaly Podzorov +2
By simultaneously measuring the excitation spectra of transient luminescence and transient photoconductivity after picosecond pulsed excitation in rubrene single crystals we show t…
Simple Model of Sickle Hemogloblin
Andrey Shiryayev, Xiaofei Li, James D. Gunton
A microscopic model is proposed for the interactions between sickle hemoglobin molecules based on information from the protein data bank. A Monte Carlo simulation of a simplified t…
Simple Model of Membrane Proteins Including Solvent
D. L. Pagan, A. Shiryayev, T. P. Connor +1
We report a numerical simulation for the phase diagram of a simple two dimensional model, similar to one proposed by Noro and Frenkel [J. Chem. Phys. \textbf{114}, 2477 (2001)] for…
Combinatorial congruences modulo prime powers
Zhi-Wei Sun, Donald M. Davis
Let p be any prime, and let a and n be nonnegative integers. Let and . We establish the congruence $$p^{°f}\sum_{k=r(mod p^a)}\binom{n}{k}(-1)^k f((k-r)/p^a)…
A number-theoretic approach to homotopy exponents of SU(n)
Donald M. Davis, Zhi-Wei Sun
We use methods of combinatorial number theory to prove that, for each and any prime , some homotopy group contains an element of order …