Q-Seminar Spin Nematic Phases in low-dimensional Quantum Magnets
Andreas Laeuchli, MPI-PKS, Dresden
In this talk I will review recent numerical work related to
the search for spin nematic phases in frustrated low-dimensional quantum
antiferromagnets with ring exchange or biquadratic exchange interactions.
The first example consists of competing Heisenberg and ring exchange
interactions and sustains a phase with ordered spin currents, in the
absence of an ordered magnetic moment. The second system involves
interacting S=1 spins on a triangular lattice with bilinear and biquadratic
exchange. Here we find spin quadrupolar phases of different spatial
structure. The possible relevance of this model to the magnetism of NiGa2S4
will be explored. We conclude with new results on multipolar phases
in a simple frustrated ferromagnetic S=1/2 chain, with possible applications
to existing experimental chain systems, such as LiCuVO4.
Monday, Feb. 2
Time
Appointment
location
email/phone
Tuesday, Feb. 3
Time
Appointment
location
email/phone
Q-Seminar
Spin Nematic Phases in low-dimensional Quantum Magnets
Andreas Laeuchli, MPI-PKS, Dresden
In this talk I will review recent numerical work related to
the search for spin nematic phases in frustrated low-dimensional quantum
antiferromagnets with ring exchange or biquadratic exchange interactions.
The first example consists of competing Heisenberg and ring exchange
interactions and sustains a phase with ordered spin currents, in the
absence of an ordered magnetic moment. The second system involves
interacting S=1 spins on a triangular lattice with bilinear and biquadratic
exchange. Here we find spin quadrupolar phases of different spatial
structure. The possible relevance of this model to the magnetism of NiGa2S4
will be explored. We conclude with new results on multipolar phases
in a simple frustrated ferromagnetic S=1/2 chain, with possible applications
to existing experimental chain systems, such as LiCuVO4.