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Dual vortex theory of doped Mott insulators
Leon Balents, Subir Sachdev
We present a general framework for describing the quantum phases obtained by doping paramagnetic Mott insulators on the square lattice. The undoped insulators are efficiently chara…
Order by disorder and spiral spin liquid in frustrated diamond lattice antiferromagnets
Doron Bergman, Jason Alicea, Emanuel Gull +2
Frustration refers to competition between different interactions that cannot be simultaneously satisfied, a familiar feature in many magnetic solids. Strong frustration results in…
Effective Hamiltonians for some highly frustrated magnets
Doron L. Bergman, Ryuichi Shindou, Gregory A. Fiete +1
In prior work, the authors developed a method of degenerate perturbation theory about the Ising limit to derive an effective Hamiltonian describing quantum fluctuations in a half-p…
Topological invariants of time-reversal-invariant band structures
J. E. Moore, L. Balents
The topological invariants of a time-reversal-invariant band structure in two dimensions are multiple copies of the invariant found by Kane and Mele. Such invariants…
Degenerate perturbation theory of quantum fluctuations in a pyrochlore antiferromagnet
Doron L. Bergman, Ryuichi Shindou, Gregory A. Fiete +1
We study the effect of quantum fluctuations on the half-polarized magnetization plateau of a pyrochlore antiferromagnet. We argue that an expansion around the easy axis limit is ap…
Ordering in spatially anisotropic triangular antiferromagnets
Oleg A. Starykh, Leon Balents
We investigate the phase diagram of the anisotropic spin-1/2 triangular lattice antiferromagnet, with interchain diagonal exchange J' much weaker than the intrachain exchange J. We…