Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 1: Focus Session: Frustration in Mott Insulators and Mott Criticality

TT 1.1: Hauptvortrag

Montag, 20. März 2017, 09:30–10:00, HSZ 03

Herbertsmithite and the Search for the Quantum Spin Liquid — •Michael Norman — Materials Science Division, Argonne National Lab, Argonne, IL 60439 USA

Quantum spin liquids are a novel class of matter where, despite the existence of strong exchange interactions, spins do not order. Typically, they occur in lattices that act to frustrate the appearance of magnetism, the classic example being the kagome lattice composed of corner sharing triangles. There are a variety of minerals whose transition metal ions form such a lattice. Of particular note is herbertsmithite, composed of copper ions forming a kagome lattice. Over the past decade, this material has been extensively studied, yielding a number of intriguing surprises that have in turn motivated a resurgence of interest in the study of the spin 1/2 Heisenberg model on a kagome lattice. In this talk, I will summarize these developments, and then discuss future directions, including the challenge of doping these materials with the hope that this could lead to novel topological or superconducting phases.