Berlin 2024 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 24: Quantum-Critical Phenomena

TT 24.3: Talk

Tuesday, March 19, 2024, 10:00–10:15, H 2053

Exotic quantum criticality in pyrochlore iridates — •David Jonas Moser and Lukas Janssen — Technische Universität Dresden, Dresden, Deutschland

Luttinger semimetals are three-dimensional strongly-spin-orbit-coupled systems, in which valence and conduction bands touch quadratically at the Fermi level. They provide a rich playground for highly unconventional physics and serve as a parent state to a number of exotic states of matter, such as Weyl semimetals, topological insulators, or spin ice. Here, we discuss various quantum critical phenomena beyond standard quantum criticality, including quasiuniversality and fixed point annihilation scenarios. Our results are relevant for the low-temperature behavior of rare-earth pyrochlore iridates, such as Pr₂Ir₂O₇ or Nd₂Ir₂O₇.

Keywords: Quantum criticality; Strongly correlated systems; Topological materials; Quantum field theory; Renormalization group