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Please use this identifier to cite or link to this item: http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/18417
Title: Probing topological phase transitions in the Aubry-Andre-Harper model via high-harmonic generation
Authors: Holkundkar, Amol R.
Bandyopadhyay, Jayendra N.
Keywords: Physics
High-harmonic generation (HHG)
Aubry-andre-harper (AAH)
Issue Date: Sep-2024
Publisher: APS
Abstract: We study the high-harmonic generation (HHG) in the Aubry-Andre-Harper (AAH) model. The modulating phase of the AAH model is used as a control parameter while preserving the chiral symmetry hosting the zero-energy edge states. The harmonic yield in a particular energy range exhibits a strong dependence on the control parameter with a clear separation of the region of topologically trivial and nontrivial phases of the system. The threshold for the harmonic yield is found to serve as an all-optical tool for detecting topological phases. We extended our study with broken chiral symmetry by including the onsite potential. The introduction of the onsite potential lifts the degeneracy in the edge states, which affects the harmonic enhancement. Furthermore, it is also observed that the system's onsite strength can control the HHG yield
URI: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.110.115103
http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/18417
Appears in Collections:Department of Physics

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