Sample records for INTERACCIONES ELECTRON-ELECTRON (electron-electron interactions)

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Ultrafast electron-phonon decoupling in graphite

Ishioka, Kunie; Hase, Muneaki; Kitajima, Masahiro; Wirtz, Ludger; Rubio Secades, Ángel; Petek, Hrvoje

4 pp.-- PACS: 78.47.-p, 63.20.-e, 81.05.Uw.-- Pre-print version available at: | We report the ultrafast dynamics of the 47.4 THz coherent phonons of graphite interacting with a photoinduced nonequilibrium electron-hole plasma. Unlike conventional materials, upon photo...

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Transition state dynamics of OHF on several electronic states: Photodetachment spectrum of OHF- and conical intersections

González-Sánchez, Lola; Gómez Carrasco, Susana; Aguado, Alfredo; Paniagua, Miguel; Hernández, M. Luz

11 pages, 12 figures, 1 table.-- PACS nrs.: 33.80.Eh; 33.70.Ca; 31.50.Df; 31.50.Bc; 31.15.Ar; 82.20.Db; 33.20.Wr; 33.15.Bh. | Wave packet simulations of the photodetachment spectrum of OHF– are performed on several electronic adiabatic states, two triplets and four singlets of neutral OHF. The trans...

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Time-dependent density functional calculation of the energy loss of antiprotons colliding with metallic nanoshells

Quijada, Marina; Borisov, A. G.; Díez Muiño, Ricardo

5 pp.-- PACS nrs.: 71.10.Ca, 71.15.Mb, 73.22.-f, 78.70.-g. | Time-dependent density functional theory is used to study the interaction between antiprotons and metallic nanoshells. The ground state electronic properties of the nanoshell are obtained in the jellium approximation. The energy lost by th...

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Theoretical study of quasiparticle inelastic lifetimes as applied to aluminum

Nechaev, I. A.; Sklyadneva, I. Y.; Silkin, Viatcheslav M.; Echenique, Pedro M.; Chulkov, Eugene V.

13 pages, 12 figures.-- PACS nrs.: 71.10.-w, 63.20.kd. | We present a comparative analysis of different microscopic approaches to quasiparticle properties in metals. Aluminum is chosen as an application object, since it exhibits characteristics many of which are well-described in the jellium model. ...

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Theoretical study of quasiparticle inelastic lifetimes as applied to aluminum

Nechaev, I. A.; Sklyadneva, I. Yu.; Silkin, Viatcheslav M.; Echenique, Pedro M.; Chulkov, Eugene V.

Digital.CSIC (Spain)


The electronic properties of graphene

Neto, A. H. Castro; Guinea, F.; Peres, N. M. R.; Novoselov, K. S.; Geim, A. K.

Digital.CSIC (Spain)


Spin-orbit effects in GaAs quantum wells: Interplay between Rashba, Dresselhaus, and Zeeman interactions

Lipparini, Enrico; Barranco, Manuel; Malet, Francesc; Pi, Martí; Serra, Llorenç

Digital.CSIC (Spain)


Screening corrections for calculation of electron scattering differential cross sections from polyatomic molecules

Blanco, F.; García Gómez-Tejedor, Gustavo

8 pages, 5 figures.-- PACS nrs.: 31.15.-p; 31.15.Ar; 34.10.+x; 34.80.-i.-- Printed version published Sep 20, 2004. | An ab initio approximate procedure is obtained for the screening correction of molecular differential cross sections calculated in the independent atom approximation. Proposed correct...

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Role of hydrophobic interactions in the flavodoxin mediated electron transfer from photosystem I to ferredoxin-NADP+ reductase in Anabaena PCC 7119

Nogués, Isabel; Martínez-Júlvez, Marta; Navarro, José Antonio; Hervás, Manuel; Armenteros, Lorena; Rosa, Miguel Angel de la

10 pages, 5 figures, 4 tables.-- PMID: 12590591 [PubMed].-- Printed version published on Feb 25, 2003. | Hydrophobic interactions play an active role in effective complex formation between ferredoxin-NADP+ reductase (FNR) and ferredoxin (Fd) from Anabaena, where an aromatic amino acid residue on the...

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Role of electron-hole pair excitations in the dissociative adsorption of diatomic molecules on metal surfaces

Juaristi Oliden, Joseba Iñaki; Alducin Ochoa, Maite; Díez Muiño, Ricardo; Busnengo, Heriberto Fabio

PACS nts.: 82.65.+r, 34.35.+a, 68.49.Df, 82.20.Kh. | We quantitatively evaluate the contribution of electron-hole pair excitations to the reactive dynamics of H2 on Cu(110) and N2 on W(110), including the six dimensionality of the process in the entire calculation. The interaction energy between mol...

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Macromolecular polyradicals with cyclic triphosphazene as a core. Spectral and electrochemical properties

Carriedo, Gabino A.; García Alonso, Francisco J.; Gómez Elipe, P.; Brillas, Enric; Labarta, Amílcar; Juliá, Lluís

Digital.CSIC (Spain)


Interlayer exchange coupling in digital magnetic alloys

Men'shov, V. N.; Tugushev, V. V.; Echenique, Pedro M.; Caprara, S.; Chulkov, Eugene V.

11 pages, 3 figures.-- PACS nrs.: 73.40.Sx, 75.70.-i. | We discuss possible mechanisms for indirect exchange between ferromagnetic δ layers of transition metal inserted into a semiconducting host, taking into account the role of carrier confinement at these layers. We show that the Ruderman-Kittel-K...

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Flavodoxin-mediated electron transfer from photosystem I to ferredoxin-NADP+ reductase in Anabaena: role of flavodoxin hydrophobic residues in protein-protein interactions

Goñi, Guillermina; Serrano, Ana; Frago, Susana; Hervás, Manuel; Peregrina, José Ramón; Rosa, Miguel A. de la

11 pages.-- PMID: 18177021 [PubMed].-- Printed version published Jan 29, 2008. | Three surface hydrophobic residues located at the Anabaena flavodoxin (Fld) putative complex interface with its redox partners were replaced by site-directed mutagenesis. The effects of these replacements on Fld interac...

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Fano-Rashba effect in a quantum wire

Sánchez, David; Serra, Llorenç

4 pages.-- PACS numbers: 73.63.Nm, 72.25.Dc, 71.70.Ej.-- Final full-text version of the paper available at: | We predict the occurrence of Fano line shapes in a semiconductor quantum wire with local spin-orbit (Rashba) coupling. We show that the Rashba i...

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Experimental excitation cross sections by electron impact of np'[1/2]0 (n=3,4,5) levels of Ne

Shaw, M.; García Borge, María José; Campos, J.

3 pages, 2 figures, 2 tables.-- PACS nr.: 34.80.Dp. | Cross sections have been measured for excitation of np'[1/2]0 (n = 3,4,5) levels of Ne I by electron impact. The electron energy ranged from the threshold to 400 eV. For the aforesaid levels the experimental cross sections are 202, 43, and 20 (x ...

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Exchange-correlation effects on quantum wires with spin-orbit interactions under the influence of in-plane magnetic fields

Malet, Francesc; Pi, Martí; Barranco, Manuel; Serra, Llorenç; Lipparini, Enrico

12 pages.-- PACS numbers: 73.63.Nm, 71.70.Ej, 71.15.Mb, 71.70.Gm.-- Final full-text version of the paper available at: | Within the noncollinear local spin-density approximation, we have studied the ground state structure of a parabolically confined quan...

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Exchange bias in laterally oxidized Au/Co/Au nanopillars

Balcells Argemi, Lluis; Martínez, B.; Iglesias, O.; García-Martín, J.M.; Cebollada, Alfonso; García, A.

Au/Co/Au nanopillars fabricated by colloidal lithography of continuous trilayers exhibit an enhanced coercive field and the appearance of an exchange bias field with respect to the continuous layers. This is attributed to the lateral oxidation of the Co interlayer that appears upon disk fabrication....

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Doped helium clusters analyzed through quantum chemistry methods

Lara Castells, M. Pilar de; Prosmiti, Rita; López Durán, David; Delgado Barrio, Gerardo; Villarreal, Pablo; Gianturco, Franco Antonio; Jellinek, J.

Digital.CSIC (Spain)


Copper in plants: acquisition, transport and interactions

Yruela Guerrero, Inmaculada

The definitive version is available | Copper is an essential metal for plants. It plays key roles in photosynthetic and respiratory electron transport chains, in ethylene sensing, cell wall metabolism, oxidative stress protection and biogenesis of molybdenum cof...

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Configuration space in electron glasses

Pérez Garrido, Antonio; Ortuño Ortín, Miguel; Díaz Sánchez, Anastasio

We study numerically the configuration space at low energy of electron glasses. We consider systems with Coulomb interactions, short–range interactions and no interactions. First, we calculate the integrated density of configurations as a function of energy. At a given energy, this density is smalle...

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Carrier-carrier correlations in an optically excited single semiconductor quantum dot

Dekel, E.; Gershoni, D.; Ehrenfreund, E.; García, Jorge M.; Petroff, P. M.

Digital.CSIC (Spain)


Anabaena flavodoxin as an electron carrier from photosystem I to ferredoxin-NADP+ reductase. Role of flavodoxin residues in protein-protein interaction and electron transfer

Nogués, Isabel; Hervás, Manuel; Peregrina, José R.; Navarro, José A.; Rosa, Miguel A. de la; Gómez-Moreno, Carlos

10 pages, 4 figures, 6 tables.-- PMID: 15628849 [PubMed].-- Available online on Dec 4, 2004. | Biochemical and structural studies indicate that electrostatic and hydrophobic interactions are critical in the formation of optimal complexes for efficient electron transfer (ET) between ferredoxin-NADP+ ...

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A time-dependent approach to electron pumping in open quantum systems

Stefanucci, Gianluca; Kurth, S.; Rubio Secades, Ángel; Gross, E. K. U.

14 pp.-- PACS nrs.: 73.23.-b, 05.60.Gg, 72.10.-d, 73.63.-b.-- Pre-print version of the paper available at: | We use a recently proposed time-dependent approach to investigate the motion of electrons in quantum pump device configurations. The occupied one-partic...

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A time-dependent approach to electron pumping in open quantum systems

Stefanucci, Gianluca; Kurth, S.; Rubio Secades, Ángel; Gross, E. K. U.

Digital.CSIC (Spain)


A full-configuration interaction "nuclear orbital'' method to study doped 3He(N) clusters (N

Lara Castells, M. Pilar de; Delgado Barrio, Gerardo; Villarreal, Pablo; Mitrushchenkov, A. O.

4 pages, 1 figure, 2 tables.-- PACS nrs.: 36.40.Cg; 31.25.-v; 33.15.Ry. | An efficient full configuration interaction (FCI) treatment, based on the Jacobi-Davidson algorithm, is developed in order to study small doped 3He(N) clusters. The state of each He atom in a given cluster is described by a se...

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Electron-positron annihilation into Φf(0)(980) and clues for a new 1(--) resonance

Napsuciale, Mauro; Oset, Eulogi; Sasaki, Kenji; Vaquera-Araujo, Carlos A.

14 pages, 4 figures.-- PACS nrs.: 13.66.Bc; 12.39.Fe; 13.75.Lb.-- ISI Article Identifier: 000250621200043.-- ArXiv pre-print available at: | We study the e(+)e(-) -> Φππ reaction for pions in an isoscalar s wave which is dominated by loop mechanisms. For kaon loops we ...

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Electron-phonon interaction on the Al(001) surface

Sklyadneva, I. Yu.; Chulkov, Eugene V.; Echenique, Pedro M.

6 pages. | We report an ab initio study of the electron–phonon (e–ph) interaction and its contribution to the lifetime broadening of excited hole (electron) surface states on Al(001). The calculations based on density-functional theory were carried out using a linear response approach in the plane-w...

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Electron-phonon interaction in the quantum well state of the 1 ML Na/Cu(111) system

Eremeev, S. V.; Rusina, G. G.; Borisova, S. D.; Tchulkov, Eugene V.

7 pp.-- PACS nrs.: 73.21.Fg, 63.20.Kr, 72.15.Lh. | The electron-phonon interaction in the quantum well state formed by a Na monolayer coating on Cu(111) is investigated theoretically. The calculations show that the electron-phonon coupling constant λ in this state decreases insignificantly (≈1%) com...

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