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Competing quantum paramagnetic ground states of the Heisenberg antiferromagnet on the star lattice
Bohm-Jung Yang, Arun Paramekanti, Yong Baek Kim
We investigate various competing paramagnetic ground states of the Heisenberg antiferromagnet on the two dimensional star lattice which exhibits geometric frustration. Using slave…
Nonequilibrium quantum criticality in bilayer itinerant ferromagnets
So Takei, William Witczak-Krempa, Yong Baek Kim
We present a theory of nonequilibrium quantum criticality in a coupled bilayer system of itinerant electron magnets. The model studied consists of the first layer subjected to an i…
Theory of Magnetic Field-Induced Bose-Einstein Condensation of Triplons in Ba3Cr2O8
Tyler Dodds, Bohm-Jung Yang, Yong Baek Kim
Motivated by recent experiments on BaCrO, a new spin-dimer compound with spin-1/2 moments of Cr ions, we theoretically investigate the field-induced magnetic…
Spin-orbit coupling in the metallic and spin-liquid phases of Na4Ir3O8
Daniel Podolsky, Yong Baek Kim
It has recently been proposed that Na4Ir3O8 is a weak Mott insulator at ambient pressure, supporting a three-dimensional spin liquid phase with a spinon Fermi surface. This proposa…
Bose-Hubbard model on a star lattice
Sergei V. Isakov, K. Sengupta, Yong Baek Kim
We analyze the Bose-Hubbard model of hardcore bosons with nearest neighbor hopping and repulsive interactions on a star lattice using both quantum Monte Carlo simulation and dual v…
Classification of quantum phases for the star-lattice antiferromagnet via a projective symmetry group analysis
Ting-Pong Choy, Yong Baek Kim
We study possible quantum ground states of the Heisenberg antiferromagnet on the star lattice, which may be realized in the recently discovered polymeric Iron Acetate, Fe(…