Spin nematics in frustrated spin-dimer systems with bilayer structure

@article{Hikihara2019SpinNI,
  title={Spin nematics in frustrated spin-dimer systems with bilayer structure},
  author={Toshiya Hikihara and Takahiro Misawa and Tsutomu Momoi},
  journal={Physical Review B},
  year={2019}
}
We study frustrated spin-1/2 dimer systems in two dimensions with a bilayer structure, where spins are ferromagnetically coupled in dimers. Our model includes frustrated two-spin exchange interactions as well as four-spin interaction. We pay particular attention to the spin nematic phase, which does not exhibit any magnetic (spin-dipole) order but has a spin-quadrupolar long-range order. Employing a perturbation calculation, a mean-field approximation, and a numerical many-variable variational… 
2 Citations

Multiple quadrupolar or nematic phases driven by the Heisenberg interactions in a spin-1 dimer system forming a bilayer

Spin nematics had long been considered as an elusive nonmagnetic state, where the spin-1 moments lose their directions while keeping the orientations in a spatially ordered manner similar to the

References

SHOWING 1-10 OF 15 REFERENCES

Spin Nematic Phases in Quantum Spin Systems

In this chapter, we explore the possibility for spin systems to develop a type of order that breaks the O(3) spin symmetry but does not have a magnetic moment. Such ordering is usually referred to as

Magnon pairing in quantum spin nematic

Competing ferro- and antiferromagnetic exchange interactions may lead to the formation of bound magnon pairs in the high-field phase of a frustrated quantum magnet. With decreasing field, magnon

Possible observation of quantum spin-nematic phase in a frustrated magnet

TLDR
A calorimeter is designed for the pulsed magnetic field studies and state-of-the-art measurements of heat capacity and magnetocaloric effect up to 33 T are performed, providing strong prima facie evidence for a spin-nematic state in the copper-based mineral volborthite.

Designing Quantum Spin-Orbital Liquids in Artificial Mott Insulators

TLDR
It is proposed that quantum spin-orbital liquids can be engineered in artificially designed solid-state systems at vastly higher temperatures than achievable in optical lattices with cold atoms.

Biquadratic Exchange and Quadrupolar Ordering

We have studied in the molecular field approximation the statistical mechanical properties of the Hamiltonian H= ∑ mnJ(m−n)Sm·Sn− ∑ mnj(m−n)(Sm·Sn)2, for spin one ions. Other authors have already

On the origin of biquadratic exchange in spin 1 chains

Abstract:One-dimensional spin 1 systems may have a rich phase diagram including Haldane gap and dimerized phases if the usually very small biquadratic exchange becomes significant. We show that this

Phase diagram of the spin-1/2 J1-J2-J3 Heisenberg model on the square lattice with ferromagnetic J1

Phase diagram of the S = 1/2, J1-J2-J3 Heisenberg model on the square lattice with ferromagnetic 1st neighbor and antiferromagnetic 2nd and 3rd neighbor interactions is studied by means of exact

Weak binding between two aromatic rings: feeling the van der Waals attraction by quantum Monte Carlo methods.

TLDR
An improved version of the stochastic reconfiguration technique is employed to optimize the many-body wave function, which is the starting point for highly accurate simulations based on the lattice regularized diffusion Monte Carlo method.