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Quantum spin liquids: From solvable models to experiments

  • Datum: 07.12.2017
  • Uhrzeit: 17:15
  • Vortragender: Prof. Matthias Vojta
  • Technical University Dresden
  • Ort: Leibniz-Institut für Agrarentwicklung in Transformationsökonomien (IAMO), Theodor-Lieser-Straße 2, 06120 Halle (Saale)
  • Raum: Hörsaal
  • Gastgeber: Martin-Luther-Universität Halle-Wittenberg

Quantum magnets play a key role in the search for novel states of matter: They can display both con-ventional (i.e. symmetry-breaking) and topological forms of order, together with novel types of ele-mentary excitations, with magnetic monopoles in spin ice being a prominent example. This talk will discuss a particularly fascinating class of frustrat-ed magnets, so-called quantum spin liquids, in which large classical degeneracies and quantum effects conspire to produce non-trivial phases. The emergence of fractionalized excitations and artifi-cial gauge fields will be discussed using explicit microscopic models. Physical signatures of these emergent phenomena will be highlighted. Throughout the talk, contact will be made with ex-periments: Candidate spin-liquid materials and key experimental results will be discussed. Finally, connections to cuprate high-temperature super-conductivity will be highlighted.

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