Výsledky vyhledávání

Topological solitons and bulk polarization switch in collinear type-II multiferroics

Autor: Daniel Carlos Cabra, Gerardo Luis Rossini, Claudio Gazza, Ariel Dobry

Publikováno v: Physical Review B. 103

We introduce a microscopic model for collinear multiferroics capable of reproducing, as a consequence of magnetic frustration and easy-axis anisotropy, the so-called ``uudd'' (or antiphase) magnetic ordering observed in several type-II multiferroic m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd3626d742be95d0b3c7b3d876b50165
https://doi.org/10.1103/physrevb.103.144421

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The effect of nitriding on the humidity sensing properties of hydrogenated amorphous carbon films

Autor: Carlos E. Repetto, B.J. Gómez, Giuliano Frattini, Ariel Dobry, Sindry Torres, Leonel I Silva

We have studied the effect of nitriding on the humidity sensing properties of hydrogenated amorphous carbon (a-C:H) films. The films were prepared in two stages combining the techniques of physical deposition in vapor phase evaporation (PAPVD) and pl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf1c013366f3abde039b7eaeb96dfb43
http://arxiv.org/abs/2102.11661

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Microscopic model for magnetoelectric coupling through lattice distortions

Autor: Daniel Carlos Cabra, Ariel Dobry, Claudio Gazza, Gerardo Luis Rossini

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We propose a microscopic magnetoelectric model in which the coupling between spins and electric dipoles is mediated by lattice distortions. The magnetic sector is described by a spin S=1/2 Heisenberg model coupled directly to the lattice via a standa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::565c19032eef735c563f533ce1d160f4
https://link.aps.org/doi/10.1103/PhysRevB.100.161111

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Resistivity humidity sensors based on hydrogenated amorphous carbon films

Autor: L. Nachez, B.J. Gómez, Carlos E. Repetto, Javier Epeloa, Ariel Dobry

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We have studied the humidity dependence of the electrical properties in hydrogenated amorphous carbon (a-C:H) films. The films were prepared in two stages combining the techniques of physical deposition in vapor phase evaporation (PAVD) and plasma pu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e7c39623655d19a49c5e7a24b41625ac
https://iopscience.iop.org/article/10.1088/2053-1591/aaed7a

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Topological Kondo insulators in one dimension: Continuous Haldane-type ground-state evolution from the strongly interacting to the noninteracting limit

Autor: Alejandro M. Lobos, Franco Thomas Lisandrini, Claudio Gazza, Ariel Dobry

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We study, by means of the density-matrix renormalization group (DMRG) technique, the evolution of the ground state in a one-dimensional topological insulator, from the non-interacting to the strongly-interacting limit, where the system can be mapped

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d28b665d92e41ba1da8066652db6e055
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.075124

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Topological quantum phase transition in strongly correlated Kondo insulators in 1D

Autor: Franco Thomas Lisandrini, Ariel Dobry, Alejandro M. Lobos, Claudio Gazza

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Papers in Physics, Vol 8, p 080005 (2016)

We investigate, by means of a field-theory analysis combined with the density-matrix renormalization group (DMRG) method, a theoretical model for a strongly correlated quantum system in one dimension realizing a topologically-ordered Haldane phase gr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83a3b2c8fd87f1121ac82b5f64298819
http://arxiv.org/abs/1608.08249

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Quantum phase diagram of the half filled Hubbard model with bond-charge interaction

Autor: Ariel Dobry, A. A. Aligia

Publikováno v: Nuclear Physics B. 843:767-783

Using quantum field theory and bosonization, we determine the quantum phase diagram of the one-dimensional Hubbard model with bond-charge interaction $X$ in addition to the usual Coulomb repulsion $U$ at half-filling, for small values of the interact

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a45d43b1e8feedd1f6afe06c26792b62
https://doi.org/10.1016/j.nuclphysb.2010.10.017

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Haldane phase in one-dimensional topological Kondo insulators

Autor: Alejandro M. Lobos, Claudio Gazza, A. Mezio, Ariel Dobry

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We investigate the groundstate properties of a recently proposed model for a topological Kondo insulator in one dimension (i.e., the $p$-wave Kondo-Heisenberg lattice model) by means of the Density Matrix Renormalization Group method. The non-standar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04724f27a5adee4733037490221388bc
http://link.aps.org/doi/10.1103/PhysRevB.92.205128

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Tuning the polarized quantum phonon transmission in graphene nanoribbons

Autor: Ariel Dobry, Pablo Martín Scuracchio, François M. Peeters, S. Costamagna

Publikováno v: Nanotechnology

We propose systems that allow a tuning of the phonon transmission function T(ω) in graphene nanoribbons by using C13 isotope barriers, antidot structures, and distinct boundary conditions. Phonon modes are obtained by an interatomic fifth-nearest ne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8ec69a2c78fa6e13f8ed0245e8d2d14
https://hdl.handle.net/10067/1271860151162165141

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Role of atomic vacancies and boundary conditions on ballistic thermal transport in graphene nanoribbons

Autor: Ariel Dobry, François M. Peeters, Pablo Martín Scuracchio, S. Costamagna

Publikováno v: Physical review : B : condensed matter and materials physics
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

Quantum thermal transport in armchair and zigzag graphene nanoribbons is investigated in the presence of single atomic vacancies and subject to different boundary conditions. We start with a full comparison of the phonon polarizations and energy disp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08186696fce70871e76e869f047b49d5
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.035429

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