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dc.contributor.author
Peralta Gavensky, Lucila  
dc.contributor.author
Usaj, Gonzalo  
dc.contributor.author
Balseiro, Carlos Antonio  
dc.date.available
2020-08-25T14:48:50Z  
dc.date.issued
2018-10  
dc.identifier.citation
Peralta Gavensky, Lucila; Usaj, Gonzalo; Balseiro, Carlos Antonio; Time-resolved Hall conductivity of pulse-driven topological quantum systems; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 98; 16; 10-2018; 1-14  
dc.identifier.issn
1098-0121  
dc.identifier.uri
http://hdl.handle.net/11336/112309  
dc.description.abstract
We address the question of how the time-resolved bulk Hall response of a two-dimensional honeycomb lattice develops when driving the system with a pulsed perturbation. A simple toy model that switches a valley Hall signal by breaking inversion symmetry is studied in detail for slow quasiadiabatic ramps and sudden quenches, obtaining an oscillating dynamical response that depends strongly on doping and time-averaged values that are determined both by the out of equilibrium occupations and the Berry curvature of the final states. On the other hand, the effect of irradiating the sample with a circularly-polarized pump pulse that breaks time reversal symmetry and thus ramps the system into a nontrivial topological regime is probed. Even though there is a nonquantized average signal due to the breakdown of the Floquet adiabatical picture, some features of the photon-dressed topological bands are revealed to be present even in a few femtosecond timescale. Small frequency oscillations during the transient response evidence the emergence of dynamical Floquet gaps which are consistent with the instantaneous amplitude of the pump envelope. On the other hand, a characteristic heterodyning effect is manifested in the model. The presence of a remnant Hall response for ultrashort pulses that contain only a few periods of the radiation field is briefly discussed.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
American Physical Society  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
DYNAMICAL HALL CONDUCTIVITY  
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FLOQUET TOPOLOGICAL INSULATORS  
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ULTRASHORT PULSES  
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Física de los Materiales Condensados  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Time-resolved Hall conductivity of pulse-driven topological quantum systems  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-15T17:55:23Z  
dc.journal.volume
98  
dc.journal.number
16  
dc.journal.pagination
1-14  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Peralta Gavensky, Lucila. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina  
dc.description.fil
Fil: Usaj, Gonzalo. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina  
dc.description.fil
Fil: Balseiro, Carlos Antonio. Comisión Nacional de Energía Atómica. Gerencia del Area de Investigación y Aplicaciones No Nucleares. Gerencia de Física (Centro Atómico Bariloche); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina  
dc.journal.title
Physical Review B: Condensed Matter and Materials Physics  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevB.98.165414  
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info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.98.165414