Dr. Elio König
University of Wisconsin, Madison
Sandwiches and Mille-Feuilles of quantum spin liquids: transport and correlation effects
Location: 1080 Physics Research Building
Faculty Host: Nandini Trivedi
Abstract: Quantum Spin Liquids (QSL) have recently enjoyed renewed interest, partly driven by synergies with quantum information theory and partly by substantial experimental progress. New material realizations, in particular in 2D van-der-Waals systems, constitute a versatile platform that allows for new device geometries combining QSLs with, e.g., metals or semimetals. In this talk, I will briefly discuss all-electrical transport signatures of QSL "sandwich" heterostructures [1]. In most of the talk, I will discuss bulk 4Hb-TaS2, which was promoted as a candidate material for alternating QSL and metallic layers (a "mille-feuille")[2]. Specifically, I will attempt to provide theoretical insight into its unconventional superconducting properties, in particular its enigmatic magnetic memory.
[1] EJ König, MT Randeria, B Jäck, Physical Review Letters 125 (26), 267206 (2020), R Mazzilli, A Levchenko, EJ König, Physical Review B 108 (1), 014425 (2023)
[2] EJ König, Physical Review Research 6 (1), L012058 (2024).
