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Time evolution of Majorana corner modes in a Floquet second-order topological superconductor
Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, India..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, India..
2023 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 107, no 3, article id 035419Article in journal (Refereed) Published
Abstract [en]

We propose a practically feasible time-periodic sinusoidal drive protocol in an on-site mass term to generate the two-dimensional (2D) Floquet second-order topological superconductor, hosting both the regular 0-and anomalous pi-Majorana corner modes (MCMs) while starting from a static 2D topological insulator/d-wave superconductor heterostructure setup. We theoretically study the local density spectra and the time dynamics of MCMs in the presence of such drive. The dynamical MCMs are topologically characterized by employing the average quadrupolar motion. Furthermore, we employ the Floquet perturbation theory (FPT) in the strong driving amplitude limit to provide analytical insight into the problem. We compare our exact (numerical) and the FPT results in terms of the eigenvalue spectra and the time dynamics of the MCMs. We emphasize that the agreement between the exact numerical and the FPT results is more prominent in the higher-frequency regime for close to the zero-quasienergy mode.

Place, publisher, year, edition, pages
American Physical Society, 2023. Vol. 107, no 3, article id 035419
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-497778DOI: 10.1103/PhysRevB.107.035419ISI: 000925077500003OAI: oai:DiVA.org:uu-497778DiVA, id: diva2:1741789
Available from: 2023-03-07 Created: 2023-03-07 Last updated: 2023-03-07Bibliographically approved

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Nag, Tanay

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