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Coexistence of excited polarons and metastable delocalized states in photoinduced metals
- Sharareh Sayyad, M. Eckstein
- Physics
- 16 October 2014
We study how polaronic states form as a function of time due to strong electron-phonon coupling, starting from a hot electron distribution which is representative of a photoinduced metallic state…
Slowdown of the Electronic Relaxation Close to the Mott Transition.
- Sharareh Sayyad, M. Eckstein
- PhysicsPhysical review letters
- 12 January 2016
We investigate the time-dependent reformation of the quasiparticle peak in a correlated metal near the Mott transition, after the system is quenched into a hot electron state and equilibrates with an…
Comparative study of nonequilibrium insulator-to-metal transitions in electron-phonon systems
- Sharareh Sayyad, R. Žitko, H. Strand, P. Werner, D. Golež
- PhysicsPhysical Review B
- 3 October 2018
We study equilibrium and nonequilibrium properties of electron-phonon systems described by the Hubbard-Holstein model using dynamical mean-field theory. In equilibrium, we benchmark the results for…
Entanglement spectrum crossings reveal non-Hermitian dynamical topology
- Sharareh Sayyad, Jinlong Yu, A. Grushin, L. M. Sieberer
- PhysicsPhysical Review Research
- 20 November 2020
The development of non-Hermitian topological band theory has led to observations of novel topological phenomena in effectively classical, driven and dissipative systems. However, for open quantum…
Pairing and non-Fermi liquid behavior in partially flat-band systems: Beyond nesting physics
- Sharareh Sayyad, E. Huang, H. Aoki
- PhysicsPhysical Review B
- 24 March 2019
While multiband systems are usually considered for flat-band physics, here we study one-band models that have flat portions in the dispersion to explore correlation effects in the 2D repulsive…
Nonequilibrium electron dynamics: Formation of the quasiparticle peak
- Sharareh Sayyad, M. Eckstein
- Physics
- 2016
Symmetry-protected exceptional and nodal points in non-Hermitian systems
- Sharareh Sayyad, M. Stålhammar, Lukas Rødland, Flore K. Kunst
- Physics
- 29 April 2022
One of the unique features of non-Hermitian (NH) systems is the appearance of non-Hermitian degeneracies known as exceptional points (EPs). The occurrence of EPs in NH systems requires satisfying…
Nematicity-enhanced superconductivity in systems with a non-Fermi liquid behavior
- Sharareh Sayyad, M. Kitatani, A. Vaezi, H. Aoki
- Physics
- 27 October 2021
Sharareh Sayyad, ∗ Motoharu Kitatani , Abolhassan Vaezi , † and Hideo Aoki 5 Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, Grenoble 38000, France RIKEN Center for Emergent Matter Sciences…
Non-Hermitian chiral anomalies
- Sharareh Sayyad, Julia D. Hannukainen, A. Grushin
- Physics
- 23 June 2021
The chiral anomaly underlies a broad number of phenomena, from enhanced electronic transport in topological metals to anomalous currents in the quark-gluon plasma. The discovery of topological states…
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