92 citations · 292 across the 14 of their papers we have counts for
6 papers · 1 filter
Anti-symmetric Chiral currents at zero magnetic field in some two-dimensional superconductors
Chandra M. Varma
Non-reciprocal critical currents without applying an external magnetic field have been observed recently in several superconductors, in various forms of Graphene, a Kagome compound…
Gyrotropic Birefringence in the Under-doped Cuprates
C. M. Varma
The optical effects due to the loop-current order parameter in under-doped cuprates are studied in order to understand the recent observation of unusual birefringence in electromag…
Berry phase and Anomalous Hall Effect in a Three-orbital Tight-binding Hamiltonian
Yan He, Joel Moore, C. M. Varma
We consider the Anomalous Hall (AH) state induced by interactions in a three-orbital per unit-cell model. To be specific we consider a model appropriate for the Copper-Oxide lattic…
A variational method in the problem of screening an external charge in strongly correlated metals
G. G. Guzmán-Verri, Arkady Shekhter, C. M. Varma
We describe a variational calculation for the problem of screening of a point charge in a layered correlated metal for dopings close to the Mott transition where the screening is n…
Collective Modes in the Loop Ordered Phase of Cuprates
Yan He, C. M. Varma
We show that the two branches of collective modes discovered recently in under-doped Cuprates with huge spectral weight are a necessary consequence of the loop-current state. Such…
Topological Excitations near the Local Critical Point in the Dissipative 2D XY model
Vivek Aji, C. M. Varma
The dissipative XY model in two spatial dimensions belongs to a new universality class of quantum critical phenomena with the remarkable property of the decoupling of the critical…