Chiral superconductivity in 4Hb-TaS2

by Prof. Amit Kanigel

Technion

at Condensed Matter Seminar

Mon, 08 May 2023, 11:10
Sacta-Rashi Building for Physics (54), room 207

Abstract

Low dimensional materials have been a major subject of interest in recent years. In particular, the transitions metal dichalcogenides (TMDs), quasi-2D layered materials with weak van der Waals coupling between layers, received a lot of attention. TMDs exhibit strong electron-electron and electron-phonon interactions that lead to complicated phase diagrams showing a variety of ground statesA fascinating frontier, largely unexplored, is the stacking of strongly correlated phases of TMDs.

We study 4Hb-TaS2, which naturally realizes an alternating stacking of 1T-TaS2 and 1H-TaS2 structures. The former is a well-known Mott insulator, which has recently been proposed to host a gapless spin-liquid ground state. The latter is a superconductor known to also host a competing charge density wave state. This raises the question of how these two components affect each other when stacked together.

I will present data from different experiments suggesting that 4Hb-TaS2 is a chiral superconductor.

Created on 04-05-2023 by Meidan, Dganit (dganit)
Updaded on 04-05-2023 by Meidan, Dganit (dganit)