Correlations in Novel Quantum Materials 2022 (CNQM2022)

Session

Transport in Correlated Quantum Materials

21 Jun 2022, 14:00

2D5 (Max Planck Institut für Festkörperforschung)

72. Joule Heating in Bad Metals

Sean Hartnoll (University of Cambridge)

21/06/2022, 14:00

Keynote Talk / Invited Talk

I will first review why it is important to disentangle the effects of electronic interactions and electron-lattice interactions in unconventional metals. I will then describe an observable process that depends crucially on electron-lattice interactions: the transfer of energy from hot electrons to a cooler lattice. Textbook discussion of this effect build upon weakly interacting electronic...

18. Thermoelectric anomaly and hydrodynamic paradox in viscous electronics

Alex Levchenko (University of Wisconsin-Madison)

21/06/2022, 14:45

Keynote Talk / Invited Talk

We study hydrodynamic electron transport in Corbino and Hall bar graphene devices. In Corbino geometry due to the irrotational character of the flow, the forces exerted on the electron liquid are expelled from the bulk. We show that in the absence of Galilean invariance, force expulsion produces qualitatively new features in thermoelectric transport: (i) it results in drops of both voltage and...

22. Dynamics of visons in perturbed Kitaev models

Achim Rosch (University of COlogne)

21/06/2022, 15:45

Keynote Talk / Invited Talk

A vison is an excitation of the Kitaev spin liquid which carries a $\mathbb Z_2$ gauge flux. While immobile in the pure Kitaev model, it becomes a dynamical degree of freedom in the presence of perturbations. We [1] study an isolated vison in the isotropic Kitaev model perturbed by a small external magnetic field h, an offdiagonal exchange interactions Γ and a Heisenberg coupling J. In the...

52. Twisting nodal superconductors

Jedediah Pixley (GNOI)

21/06/2022, 16:15

Keynote Talk / Invited Talk

The realization of correlated insulators and superconductivity in twisted van der Waals heterostructures has brought forth twisting as a new control knob in condensed matter laboratories. In this talk we will show how twisting can be used to control the low energy physics of bilayers of nodal superconductors. Focusing in the vicinity of the Dirac nodes in their Bogolioubov de Gennes (BdG)...