TRR 360 Seminar:

Some exotic phases for spin-1/2 on the triangular lattice

Sylvain Capponi

Some exotic phases for spin-1/2 on the triangular lattice

Prof. Dr. Sylvain Capponi

Laboratoire de Physique Théorique, Université de Toulouse, CNRS, UPS, France

The triangular lattice is at the origin of magnetic frustration both for Ising or Heisenberg models, as shown by Wannier and Anderson respectively. Hence it is a natural testbed to stabilize unconventional phases of matter. In this talk, I will present two recent numerical studies discussing

(i) the possibility of a Dirac spin liquid in the J1-J2 Heisenberg model [1]
(ii) the possibility of a supersolid phase in the XXZ model [2] and its relevance to recent scattering experiments on K₂Co(SeO₃)₂

[1] A. Wietek, S. Capponi, and A. Läuchli, Phys. Rev. X 14, 021010 (2024)
[2] S. Capponi and A. Läuchli, in preparation