Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Aryanpour K"'
Publikováno v:
J. Phys. Chem. C, 2014, 118 (6), pp 3331-3339
Strong electron correlation effects in the photophysics of quasi-one-dimensional $\pi$-conjugated organic systems such as polyenes, polyacetylenes, polydiacetylenes, etc., have been extensively studied. Far less is known on correlation effects in two
Externí odkaz:
http://arxiv.org/abs/1311.0567
Publikováno v:
J. Chem. Phys. 140, 104301 (2014)
We present numerical studies of one- and two-photon excited states ordering in a number of polycyclic aromatic hydrocarbon molecules: coronene, hexa-peri-hexabenzocoronene and circumcoronene, all possessing $D_{6h}$ point group symmetry versus ovalen
Externí odkaz:
http://arxiv.org/abs/1310.6097
Publikováno v:
J. Phys. Chem. C 2013, 117, 4971-4979
Singlet fission, in which the optical spin-singlet exciton dissociates into two low energy triplet excitons, has been proposed as a viable approach to enhance the quantum efficiency of organic solar cells. We show that even when singlet fission is oc
Externí odkaz:
http://arxiv.org/abs/1209.4442
Publikováno v:
Phys. Rev. B 85, 085438 (2012)
We show that the energy differences between the lowest optical singlet exciton and the lowest triplet exciton in semiconducting single-walled carbon nanotubes with diameter $\sim 1$ nm and graphene nanoribbons with widths $\sim 2$ nm are an order of
Externí odkaz:
http://arxiv.org/abs/1108.3880
Autor:
Aryanpour, K., Sheng, C. -X., Olejnik, E., Pandit, B., Psiachos, D., Mazumdar, S., Vardeny, Z. V.
Publikováno v:
Phys. Rev. B 83, 155124 (2011)
We report pressure-dependent transient picosecond and continuous-wave photomodulation studies of disordered and ordered films of 2-methoxy-5-(2-ethylhexyloxy) poly(para-phenylenevinylene). Photoinduced absorption (PA) bands in the disordered film exh
Externí odkaz:
http://arxiv.org/abs/1009.6226
Publikováno v:
Phys. Rev. B 81, 085407 (2010)
We present a theory of the electronic structure and photophysics of 1:1 blends of derivatives of polyparaphenylenevinylene and fullerenes. Within the same Coulomb-correlated Hamiltonian applied previously to interacting chains of single-component $\p
Externí odkaz:
http://arxiv.org/abs/0908.0366
Autor:
Aryanpour, K., Han, J. E.
Publikováno v:
Phys. Rev. Lett. 102, 056805 (2009)
We study one-dimensional itinerant electron models with ferromagnetic coupling to investigate the origin of 0.7 anomaly in quantum point contacts. Linear conductance calculations from the quantum Monte Carlo technique for spin interactions of differe
Externí odkaz:
http://arxiv.org/abs/0810.3206
s-wave Superconductivity Phase Diagram in the Inhomogeneous Two-Dimensional Attractive Hubbard Model
Publikováno v:
Phys. Rev. B 76, 184521 (2007)
We study s-wave superconductivity in the two-dimensional square lattice attractive Hubbard Hamiltonian for various inhomogeneous patterns of interacting sites. Using the Bogoliubov-de Gennes (BdG) mean field approximation, we obtain the phase diagram
Externí odkaz:
http://arxiv.org/abs/0708.0451
Publikováno v:
Phys. Rev. B 74, 085117 (2006)
We employ dynamical mean field theory (DMFT) with a Quantum Monte Carlo (QMC) atomic solver to investigate the finite temperature Mott transition in the Hubbard model with the nearest neighbor hopping on a triangular lattice at half-filling. We estim
Externí odkaz:
http://arxiv.org/abs/cond-mat/0604609
We calculate the density-of-states and the spectral function of GaMnAs within the dynamical mean-field approximation. Our model includes the competing effects of the strong spin-orbit coupling on the J=3/2 GaAs hole bands and the exchange interaction
Externí odkaz:
http://arxiv.org/abs/cond-mat/0510716