Topological phase transitions at finite temperature

P Molignini, NR Cooper - Physical Review Research, 2023 - APS
The ground states of noninteracting fermions in one-dimension with chiral symmetry form a
class of topological band insulators, described by a topological invariant that can be related …

Unconventional scaling at non-Hermitian critical points

R Arouca, CH Lee, C Morais Smith - Physical Review B, 2020 - APS
Critical phase transitions contain a variety of deep and universal physics and are intimately
tied to thermodynamic quantities through scaling relations. Yet, these notions are …

Multi-critical topological transition at quantum criticality

RR Kumar, YR Kartik, S Rahul, S Sarkar - Scientific Reports, 2021 - nature.com
The investigation and characterization of topological quantum phase transition between
gapless phases is one of the recent interest of research in topological states of matter. We …

Josephson-Current Signatures of Unpaired Floquet Majorana Fermions

R Kumari, B Seradjeh, A Kundu - Physical Review Letters, 2024 - APS
We theoretically study the transport signatures of unpaired Floquet Majorana fermions in the
Josephson current of weakly linked, periodically driven topological superconductors. We …

Quench dynamics and scaling laws in topological nodal loop semimetals

K Sim, R Chitra, P Molignini - Physical Review B, 2022 - APS
We employ quench dynamics as an effective tool to probe different universality classes of
topological phase transitions. Specifically, we study a model encompassing both Dirac-like …

Fidelity susceptibility near topological phase transitions in quantum walks

S Panahiyan, W Chen, S Fritzsche - Physical Review B, 2020 - APS
The notion of fidelity susceptibility, introduced within the context of quantum metric tensor,
has been an important quantity to characterize the criticality near quantum phase transitions …

Unification of topological invariants in Dirac models

G von Gersdorff, S Panahiyan, W Chen - Physical Review B, 2021 - APS
Topological phases of materials are characterized by topological invariants that are
conventionally calculated by different means according to the dimension and symmetry …

Anomalous floquet chiral topological superconductivity in a topological insulator sandwich structure

RX Zhang, S Das Sarma - Physical Review Letters, 2021 - APS
We show that Floquet chiral topological superconductivity arises naturally in Josephson
junctions made of magnetic topological insulator-superconductor sandwich structures. The …

Probing Chern number by opacity and topological phase transition by a nonlocal Chern marker

P Molignini, B Lapierre, R Chitra, W Chen - SciPost Physics Core, 2023 - scipost.org
In 2D semiconductors and insulators, the Chern number of the valence band Bloch state is
an important quantity that has been linked to various material properties, such as the …

Unifying topological phase transitions in non-interacting, interacting, and periodically driven systems

P Molignini, R Chitra, W Chen - Europhysics Letters, 2020 - iopscience.iop.org
Topological phase transitions occur in real materials as well as quantum engineered
systems, all of which differ greatly in terms of dimensionality, symmetries, interactions, and …