%0 Journal Article
%J PHYSICAL REVIEW B
%D 2017
%T Magnetic phases of spin-1 lattice gases with random interactions
%A McAlpine, Kenneth D.
%A Paganelli, Simone
%A Ciuchi, Sergio
%A Sanpera, Anna
%A De Chiara, Gabriele
%X A spin-1 atomic gas in an optical lattice, in the unit-filling Mott insulator (MI) phase and in the presence of disordered spin-dependent interaction, is considered. In this regime, at zero temperature, the system is well described by a disordered rotationally invariant spin-1 bilinear-biquadratic model. We study, via the density matrix renormalization group algorithm, a bounded disorder model such that the spin interactions can be locally either ferromagnetic or antiferromagnetic. Random interactions induce the appearance of a disordered ferromagnetic phase characterized by a nonvanishing value of the spin glass order parameter across the boundary between a ferromagnetic phase and a dimer phase exhibiting random singlet order. We also study the distribution of the block entanglement entropy in the different regions.
%B PHYSICAL REVIEW B
%V 95
%8 jun
%R 10.1103/PhysRevB.95.235128