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A direct transition between a Neel ordered Mott insulator and a superconductor on the square lattice
Ying Ran, Ashvin Vishwanath, Dung-Hai Lee
In this paper we study a bandwidth-controlled direct, continuous, phase transition from a Mott insulator, with easy plane Neel order, to a fully gapped superconductor…
Spin phonon induced colinear order and magnetization plateaus in triangular and kagome antiferromagnets. Applications to CuFeO_2
Fa Wang, Ashvin Vishwanath
Coupling between spin and lattice degrees of freedom are important in geometrically frustrated magnets where they can lead to degeneracy lifting and novel orders. We show that mode…
Quantum and Classical Spins on the Spatially Distorted Kagome Lattice: Applications to Volborthite
Fa Wang, Ashvin Vishwanath, Yong Baek Kim
In Volborthite, spin-1/2 moments form a distorted Kagomé lattice, of corner sharing isosceles triangles with exchange constants on two bonds and on the third bond. We stud…
Quantum criticality beyond the Landau-Ginzburg-Wilson paradigm
T. Senthil, Leon Balents, Subir Sachdev +2
We present the critical theory of a number of zero temperature phase transitions of quantum antiferromagnets and interacting boson systems in two dimensions. The most important exa…
"Deconfined" quantum critical points
T. Senthil, Ashvin Vishwanath, Leon Balents +2
The theory of second order phase transitions is one of the foundations of modern statistical mechanics and condensed matter theory. A central concept is the observable `order param…
Screening and Dissipation at the Superconductor-Insulator Transition Induced by a Metallic Ground Plane
Ashvin Vishwanath, Joel E. Moore, T. Senthil
We study localization phenomena in two dimensional systems of charged particles in the presence of a metallic ground plane with a particular focus on the superconductor-insulator t…