Strain controls antiferromagnetism

Antiferromagnetism with Ultracold Atoms

We use ultracold spin–1/2 atomic fermions (Li) to realize the Hubbard model on a three-dimensional (3D) optical lattice. At relatively high temperatures and at densities near half-filling, we show that the gas forms a Mott insulator with unordered spins. To observe antiferromagnetic order that is predicted to occur at lower temperatures, we developed the compensated optical lattice method to ev...

Entangling Superconductivity and Antiferromagnetism

Superconductivity and Antiferromagnetism

We study the structure of symmetric vortices in a Ginzburg–Landau model based on S. C. Zhang’s SO(5) theory of high temperature superconductivity and antiferromagnetism. We consider both a full Ginzburg–Landau theory (with Ginzburg–Landau scaling parameter κ < ∞) and a κ → ∞ limiting model. In all cases we find that the usual superconducting vortices (with normal phase in the central core regio...

Antiferromagnetism in Pr3In

We present neutron diffraction, magnetic susceptibility and specific heat data for a single-crystal sample of the cubic Cu3Au structure compound Pr3In. Antiferromagnetic order occurs below TN=12 K with propagation vector 0,0 ,0.5± where 1/12. The neutron diffraction results can be approximated with a model where the moments in each of the three Pr sublattices form ferromagnetic sheets perpendic...

Antiferromagnetism in EuCu2As2 and EuCu1.82Sb2 Single Crystals

Single crystals of EuCu2As2 and EuCu2Sb2 were grown from CuAs and CuSb self-flux, respectively. The crystallographic, magnetic, thermal and electronic transport properties of the single crystals were investigated by room-temperature x-ray diffraction (XRD), magnetic susceptibility χ versus temperature T , isothermal magnetization M versus magnetic field H , specific heat Cp(T ) and electrical r...