Search Results - "Wang, Chumin"

A Real-Space Study of Flat Bands in Nanowires by Sánchez, Vicenta, Wang, Chumin

“…The flat electronic band has remarkable relevance in the strongly correlated phenomena mainly due to its reduced kinetic energy in comparison to the many-body…”
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Ab initio design and experimental confirmation of Fabry–Perot cavities based on freestanding porous silicon multilayers by Palavicini, Alessio, Wang, Chumin

“…In this article, we report a hybrid quantum–classical design of Fabry–Perot multilayer cavities. Such design starts from an ab initio calculation of the…”
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Hydrogen, oxygen and hydroxyl on porous silicon surface: A joint density-functional perturbation theory and infrared spectroscopy approach by Alfaro, Pedro, Palavicini, Alessio, Wang, Chumin

“…Based on the density functional perturbation theory (DFPT), infrared absorption spectra of porous silicon are calculated by using an ordered pore model, in…”
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Real Space Theory for Electron and Phonon Transport in Aperiodic Lattices via Renormalization by Sánchez, Vicenta, Wang, Chumin

“…Structural defects are inherent in solids at a finite temperature, because they diminish free energies by growing entropy. The arrangement of these defects may…”
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Independent Dual-Channel Approach to Mesoscopic Graphene Transistors by Sánchez, Fernando, Sánchez, Vicenta, Wang, Chumin

“…Graphene field-effect transistors (GFETs) exhibit unique switch and sensing features. In this article, GFETs are investigated within the tight-binding…”
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Coarse-Grained Quantum Theory of Organic Photovoltaic Devices by Sánchez, Fernando, Sánchez, Vicenta, Wang, Chumin

“…Understanding the exciton dissociation process in organic solar cells is a fundamental issue for the design of high-performance photovoltaic devices. In this…”
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Non-perturbative study of impurity effects on the Kubo conductivity in macroscopic periodic and quasiperiodic lattices by Sánchez, Vicenta, Ramírez, Carlos, Sánchez, Fernando, Wang, Chumin

“…In this paper, we analyze the effects of site and bond impurities on the electrical conductance of periodic and quasiperiodic systems with macroscopic length…”
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Raman scattering by confined optical phonons in Si and Ge nanostructures by Alfaro, Pedro, Cisneros, Rodolfo, Bizarro, Monserrat, Cruz-Irisson, Miguel, Wang, Chumin

“…A microscopic theory of the Raman scattering based on the local bond-polarizability model is presented and applied to the analysis of phonon confinement in…”
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Renormalization Plus Convolution Method for Atomic-Scale Modeling of Electrical and Thermal Transport in Nanowires by Wang, Chumin, Salazar, Fernando, Sánchez, Vicenta

“…Based on the Kubo−Greenwood formula, the transport of electrons and phonons in nanowires is studied by means of a real-space renormalization plus convolution…”
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Application of renormalization and convolution methods to the Kubo-Greenwood formula in multidimensional Fibonacci systems by SANCHEZ, Vicenta, CHUMIN WANG

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Renormalization–convolution approach to the electronic transport in two-dimensional aperiodic lattices by Sánchez, Vicenta, Wang, Chumin

“…A novel method combining the renormalization and convolution techniques is developed for the Kubo–Greenwood formula. Using this method, the dc and ac…”
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Oxygen Absorption in Free-Standing Porous Silicon: A Structural, Optical and Kinetic Analysis by Cisneros, Rodolfo, Pfeiffer, Heriberto, Wang, Chumin

“…Porous silicon (PSi) is a nanostructured material possessing a huge surface area per unit volume. In consequence, the adsorption and diffusion of oxygen in PSi…”
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Ab-initio determination of porous silicon refractive index confirmed by infrared transmittance measurements of an omnidirectional multilayer reflector by Palavicini, Alessio, Wang, Chumin

“…We report a multiscale design of omnidirectional Bragg mirrors based on dielectric multilayers by combining quantum mechanical and electromagnetic theories…”
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Magneto-optical conductivity of anisotropic two-dimensional Dirac–Weyl materials by Oliva-Leyva, M., Wang, Chumin

“…In the presence of an external magnetic field, the optical response of two-dimensional materials, whose charge carriers behave as massless Dirac fermions with…”
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Analysis of the BCS equations for anisotropic superconductivity by Pérez, Luis A., Millán, J. Samuel, Shelomov, Evgen, Wang, Chumin

“…Anisotropic superconducting states have been studied within a generalized Hubbard model and the BCS formalism, which leads to two coupled integral equations…”
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Ab initio study of birefringent porous silicon by Bonder, Yuri, Wang, Chumin

“…Optical properties of birefringent porous‐silicon layers are studied within the density functional theory. Starting from a (110)‐oriented supercell of 32…”
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Nodal effects on the electronic specific heat of anisotropic superconductors by Pérez, Luis A., Samuel Millán, J., Wang, Chumin

“…Based on the BCS formalism, the electronic specific heat of d-symmetry superconducting states is studied. This study is performed on a square lattice described…”
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Superconductivity in correlated carbon nanotubes under pressure: A Bogoliubov-de Gennes study by López, Germán E., Wang, Chumin

“…In contrast to most microscopic theories of superconductivity based on the reciprocal space, the Bogoliubov-de Gennes (BdG) formalism provides a real-space…”
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The One Phonon Raman Spectrum of Silicon Nanostructures by Alfaro, P., Cruz, M., Chumin Wang

“…Porous silicon is a structurally complex material, in which effects of the pore topology on its physical properties are even controversial. We use the Born…”
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d-Wave hole superconductivity in low-dimensional Hubbard systems by Pérez, Luis A., Wang, Chumin

“…Superconducting states with d symmetry in anisotropic hole systems are investigated within a generalized Hubbard model and the BCS framework. The results…”
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