Instituto de Física Rosario
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Publications with the keyword "ground state"

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C. Lavado, A. Rébola, R. Machado, and M. Stachiotti
Multiferroic properties of three-layer Aurivillius compound Bi4TiFeNbO12: A first-principles and experimental study
Solid State Communications (cited By 0), 320, 2020
antiferroelectricity antiferromagnetism bismuth compounds calculations energy gap ferroelectricity ground state iron compounds lanthanum compounds magnetic properties multiferroics niobium compounds positive ions solid state reactions titanium compounds antiferromagnetic coupling aurivillius compounds correlation functionals magnetic ground state multiferroic properties relative stabilities solid state reaction method spontaneous polarizations vanadium compounds
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M. Gonzalez, F. Lisandrini, G. Blesio, A. Trumper, C. Gazza, and L. Manuel
Correlated Partial Disorder in a Weakly Frustrated Quantum Antiferromagnet
Physical Review Letters (cited By 3), 122(1), 2019
entropy ground state honeycomb structures quantum electronics finite temperatures heisenberg antiferromagnets honeycomb lattices long range magnetic order quantum antiferromagnets quantum fluctuation quantum ground state triangular lattice antiferromagnetic materials
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G. Blesio, M. Gonzalez, and F. Lisandrini
Magnetic phase diagram of the infinite- U Hubbard model with nearest- and next-nearest-neighbor hoppings
Physical Review B (cited By 0), 99(17), 2019
carrier concentration electron density measurement ground state hubbard model phase diagrams statistical mechanics density matrix renormalization group fully spin-polarized infinite-u hubbard model itinerant ferromagnetism magnetic phase diagrams nearest neighbor hopping nearest neighbors paramagnetic state spin polarization
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E. Ghioldi, M. Gonzalez, S.-S. Zhang, Y. Kamiya, L. Manuel, A. Trumper, and C. Batista
Dynamical structure factor of the triangular antiferromagnet: Schwinger boson theory beyond mean field
Physical Review B (cited By 13), 98(18), 2018
bosons excited states expansion ground state melting point dynamical structure factors excitation spectrum gaussian fluctuations magnetically ordered compounds qualitative differences spontaneous symmetry breaking triangular lattice zero temperatures quantum theory
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D. Huerga, A. Greco, C. Gazza, and A. Muramatsu
Translation-Invariant Parent Hamiltonians of Valence Bond Crystals
Physical Review Letters (cited By 2), 118(16), 2017
ground state mean field theory antiferromagnetics canonical mappings correlation lengths exact diagonalization fermion operators intermediate phasis translation invariants valence bond crystals hamiltonians
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C. Sposetti, L. Manuel, and P. Roura-Bas
Qualitative breakdown of the noncrossing approximation for the symmetric one-channel Anderson impurity model at all temperatures
Physical Review B (cited By 5), 94(8), 2016
entropy ground state anderson impurity model anderson models low temperatures physical systems symmetric anderson model symmetric case threshold exponents zero temperatures temperature
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P. Abufager, G. Zampieri, K. Reuter, M. Martiarena, and H. Busnengo
Long-range periodicity of S/Au(111) structures at low and intermediate coverages
Journal of Physical Chemistry C (cited By 15), 118(1), 290-297, 2014
coverage ranges dft calculation ground-state structures hamiltonian approach lateral interactions relative stabilities substrate relaxation systematic analysis ground state calculations
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C. Sposetti, B. Bravo, A. Trumper, C. Gazza, and L. Manuel
Classical Antiferromagnetism in Kinetically Frustrated Electronic Models
Physical Review Letters (cited By 7), 112(18), 2014
antiferromagnetism ground state kinetic energy statistical mechanics antiferromagnetic ground state antiferromagnetics density matrix renormalization group frustrated models hopping amplitude infinite-u hubbard model local magnetization thermodynamic limits kinetics
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A. Mezio, C. Sposetti, L. Manuel, and A. Trumper
Broken discrete and continuous symmetries in two-dimensional spiral antiferromagnets
Journal of Physics Condensed Matter (cited By 3), 25(46), 2013
ground state lattice theory mean field theory spin fluctuations antiferromagnetic heisenberg models boson mean field theory collinear correlations continuous symmetry finite temperatures intermediate temperatures monte carlo results thermal fluctuations antiferromagnetic materials
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M. Sepliarsky and R. Cohen
First-principles based atomistic modeling of phase stability in PMNxPT
Journal of Physics Condensed Matter (cited By 40), 23(43), 2011
atomistic modeling ferroelectric behavior first-principles high temperature phase molecular dynamics simulations morphotropic phase boundaries polar state polarization direction shell models site occupancy state sequences structural disorders tetragonal symmetries ti content computer simulation ferroelectricity ground state molecular dynamics phase diagrams phase stability
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D. Mastrogiuseppe, C. Gazza, and A. Dobry
Dimerization process and elementary excitations in spin-Peierls chains coupled by frustrated interactions
Journal of Physics Condensed Matter (cited By 1), 20(13), 2008
dimerization magnetic couplings matrix algebra parameter estimation solitons elastic interchains elementary excitations magnetic interactions ground state
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M. Alducin, H. Busnengo, and R. Muiño
Dissociative dynamics of spin-triplet and spin-singlet O2 on Ag(100)
Journal of Chemical Physics (cited By 31), 129(22), 2008
density functional theory dissociation dynamics ground state molecular dynamics molecules potential energy potential energy surfaces quantum chemistry silver classical trajectories incidence energies singlet excited states surface interactions spin dynamics
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O. Fojón, A. Palacios, J. Fernández, R. Rivarola, and F. Martín
Interferences in the photoelectron spectrum of H2+ molecules at high energy
Physics Letters, Section A: General, Atomic and Solid State Physics (cited By 30), 350(56), 371-374, 2006
calculations ground state molecules photoelectrons photoionization photons ab initio calculations b-spline basis function hydrogen molecule interference effects interferences lcao approximation oscillatory behaviors photoelectron spectrum photoelectron spectroscopy
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M. Stachiotti
Ferroelectricity in BaTiO3 nanoscopic structures
Applied Physics Letters (cited By 56), 84(2), 251-253, 2004
atomic physics barium titanate ferroelectricity films ground state polarization barium titanate nanoscopic films ground state polarization stress free film nanostructured materials
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P. Macri, J. Miraglia, J. Hanssen, O. Fojón, and R. Rivarola
Evidence of two-channel distortion effects in positronium formation reactions
Journal of Physics B: Atomic, Molecular and Optical Physics (cited By 10), 37(6), L111-L119, 2004
impact energy positroniums wavefunctions approximation theory charge transfer continuum mechanics electrodynamics electrons ground state isotopes protons quantum theory high energy physics
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L. Manuel, C. Gazza, A. Feiguin, and A. Trumper
The spectral function for Mott insulating surfaces
Journal of Physics Condensed Matter (cited By 5), 15(17), 2435-2440, 2003
antiferromagnetism ground state magnetic field effects photoemission semiconducting silicon spectrum analysis surface treatment goldstone mode mott insulating surfaces spectral function electric insulating materials
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A. Trumper and C. Gazza
Dimensional crossover in alternating spin chains
Physica B: Condensed Matter (cited By 1), 320(14), 340-342, 2002
correlation methods ground state magnetic couplings phase transitions spin wave (sw) theory antiferromagnetism
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P. Abufager, H. Busnengo, A. Mártínez, and R. Rivarola
Electron capture from excited states of hydrogen by impact of bare ions
Physica Scripta (cited By 1), 66(1), 38-42, 2002
alpha particles approximation theory charge transfer hydrogen ions polarization protons electron capture ground state
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P. Weck, O. Fojón, J. Hanssen, B. Joulakian, and R. Rivarola
Two-effective center approximation for the single ionization of molecular hydrogen by fast electron impact
Physical Review A. Atomic, Molecular, and Optical Physics (cited By 6), 63(4), 427091-427096, 2001
approximation theory electron transitions electronic structure ground state ionization of gases matrix algebra diatomic hydrogen hydrogen
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J. Hanssen, P. Hervieux, O. Fojón, and R. Rivarola
Positronium formation in positron-metastable-helium collisions
Physical Review A - Atomic, Molecular, and Optical Physics (cited By 6), 63(1), 012705-012701, 2001
approximation theory continuum mechanics ground state helium impact ionization mathematical models polarization positrons signal interference positronium formation molecular dynamics
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O. Fojón, R. Rivarola, J. Hanssen, and P. Hervieux
Positronium formation in positron-simple metal cluster collisions
Journal of Physics B: Atomic, Molecular and Optical Physics (cited By 6), 34(22), 4279-4291, 2001
approximation theory atomic physics atoms charge transfer computer simulation ground state sodium continuum distorted-wave approximation coulomb-born type approximation positron-simple metal cluster collisions positronium formation positrons
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C. Stia, O. Fojón, and R. Rivarola
(e,2e) reactions for He+ and Li2+ ions from their excited states. Scaling law
Physica Scripta T (cited By 0), 92, 303-306, 2001
boundary conditions electron scattering electron transitions ground state helium lithium positive ions hydrogenic atoms ionization
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P. Weck, B. Joulakian, J. Hanssen, O. Fojón, and R. Rivarola
Multiple differential cross sections for single ionization of H2, D2, and T2 molecules by fast electron impact: influence of vibrational states
Physical Review A - Atomic, Molecular, and Optical Physics (cited By 17), 62(1), 014701-014701, 2000
approximation theory deuterium eigenvalues eigenfunctions electron transitions ground state hydrogen ionization mathematical models molecular orientation molecular vibrations quantum theory tritium born approximation fast electron impact fivefold differential cross section atomic physics
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M. Galassi, R. Rivarola, M. Beuve, G. Olivera, and P. Fainstein
Theoretical calculation of single ionization in collisions between protons and low-Z molecules at intermediate and high energies
Physical Review A - Atomic, Molecular, and Optical Physics (cited By 46), 62(2), 022701-022701, 2000
atoms binding energy carbon monoxide ground state ionization molecules nitrogen perturbation techniques protons continuum distorted wave eikonal initial state doubly differential total cross section molecular wave function single ionization molecular dynamics
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O. Fojón, J. Haussen, P. Hervieux, and R. Rivarola
Transfer excitation in collisions of positrons with He and alkaline-earth metals
Journal of Physics B: Atomic, Molecular and Optical Physics (cited By 8), 33(16), 3093-3105, 2000
addition reactions alkaline earth metals approximation theory atoms charge transfer electrons ground state helium continuum distorted wave final state model coulomb-born approximation inner shell electron positron alkaline earth metal positronium formation positrons
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