Physics Online Seminar by Dr. Tanay Nag | Shiv Nadar University
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Physics Online Seminar by Dr. Tanay Nag

The Department of Physics, School of Natural Sciences, cordially invites you to an online seminar as per the following schedule:

- Title: Dynamical construction of Quadrupolar and Octupolar topological superconductors
- Speaker: Dr. Tanay Nag
                 (Uppsala University, Sweden)

- Date of seminar: 14 November 2022 [Mon]
- Time: 2 to 3 PM
- Venue: Online (MS Teams, Joining Link: TBA)

- Abstract:
We propose a three-step periodic drive protocol to engineer two-dimensional (2D) Floquet quadrupole superconductors and three-dimensional (3D) Floquet octupole superconductors hosting zero-dimensional Majorana corner modes (MCMs), based on unconventional d-wave superconductivity. Remarkably, the driven system conceives four phases with only 0 MCMs, no MCMs, only anomalous π MCMs, and both regular 0 and anomalous π MCMs. To circumvent the subtle issue of characterizing 0 and π MCMs separately, we employ the periodized evolution operator to architect the dynamical invariants, namely quadrupole and octupole motion in 2D and 3D, respectively, that can distinguish different higher- order topological phases unambiguously. Our study paves the way for the realization of dynamical quadrupolar and octupolar topological superconductors.

- Reference: Phys. Rev. B105, 155406 (2022)

Event Date: 
Monday, November 14, 2022 - 14:00
Monday 14, Nov 2022
02:00 PM - 02:00 PM