Date

October 5-8, 2026

Place

Panasonic Auditorium, Yukawa Hall
Yukawa Institute for Theoretical Physics, Kyoto University
Kyoto, Japan

Workshop Overview

  The kagome lattice possesses a geometrically frustrated structure composed of corner-sharing triangles, and the diverse quantum phases and topological phenomena arising from this geometry have attracted increasing attention in recent years. In particular, the discovery of “kagome metals,” in which conduction electrons itinerate on the kagome lattice, has stimulated worldwide research activities. Representative examples include Fe3Sn2, CoSn, AV3Sb5, and AV6Sb6 (A = K, Rb, Cs), in which a variety of quantum phases have been explored, such as itinerant magnetism, topological electronic states, charge order, and superconductivity.
  The electronic band structure of kagome metals exhibits three prominent features: a “flat band” with effectively infinite mass, “Dirac points” with zero effective mass, and “van Hove singularities” at specific momenta where the effective mass diverges. When strong electron correlations and spin–orbit interactions are present, various phenomena can emerge, including the quantum anomalous Hall effect and topological superconductivity, accompanying the spontaneous loop current that break time-reversal symmetry. As a result, new aspects of quantum physics continue to be uncovered.
  In “kagome semimetals”, Weyl semimetal phases have been discovered, and nontrivial topological properties associated with Berry curvature, such as large anomalous Hall effects, magnetoresistance, and surface Fermi arcs, have been reported.
  Furthermore, in “kagome spin systems”, recently discovered ideal kagome materials with minimal disorder have significantly advanced the study of quantum spin liquid states. In particular, substantial progress has been made on long-standing issues of nearly half a century, including the presence or absence of a zero-field gap and the discovery of novel magnetization plateau.
  This conference will invite leading researchers from around the world to share the latest theoretical and experimental results, to clarify open problems in the field, and to discuss future research directions. It will also promote international collaboration among different research communities, including strongly correlated electron systems, topological quantum materials, and advanced measurement techniques, thereby contributing to further development of the field.

Invited Speakers

Organizers

  • Hiroshi Kontani (Nagoya University)
  • Chisa Hotta (The University of Tokyo)
  • Philip Moll (Max Planck Institute, Hamburg)
  • Kentaro Nomura (Kyushu University)
  • Masatoshi Sato (Yukawa Institute for Theoretical Physics, Kyoto University)
  • Rina Tazai (Yukawa Institute for Theoretical Physics, Kyoto University)
  • Takami Tohyama (Tokyo University of Science)
  • Ziqiang Wang (Boston College)