A new definition of order called topological order is proposed for two-dimensional systems in which no long-range order of the conventional type exists. The possibility of a pha...
Dislocation theory is used to define long range order for two dimensional solids. An ordered state exists at low temperatures, and the rigidity modulus is nonzero at the transit...
The argument of Landau and Lifshitz for the absence of long-range order in one-dimensional systems is used to show that order is absent if the interaction energy falls off faste...
The Hall conductance of a two-dimensional electron gas has been studied in a uniform magnetic field and a periodic substrate potential $U$. The Kubo formula is written in a form...
The effect of a random substrate potential on electrons in a two-dimensional system in a strong magnetic field is examined. At zero temperature if the Fermi energy lies between ...
We show that the existence of the Magnus force is a general property of a vortex line in a superconductor by calculating the Berry phase for an adiabatic motion around a closed ...
We have performed a theoretical study of the effects of pinning potential and\ndissipation on vortex tunneling in superconductors. Analytical results are\nobtained in various li...
Whenever the Fermi level lies in a gap (or mobility gap) the bulk Hall conductance can be expressed in a topologically invariant form showing the quantization explicitly. The ne...
h-index: Number of publications with at least h citations each.