S. Mondal

TL;DR: It is shown that the conductance of such a junction, in the clean limit and at low temperature, changes from oscillatory to a monotonically decreasing function of d beyond a critical J, which leads to the possible realization of a magnetic switch using these junctions.

TL;DR: In this paper, Mondal et al. studied the properties of Dirac fermions on the surface of a topological insulator in the presence of crossed electric and magnetic fields.

TL;DR: The properties of systems near quantum critical points (QCPs) have been studied extensively in recent years [1, 2] as discussed by the authors, and the properties of low-energy equilibrium physics near a QCP is associated with a number of critical exponents which characterize the universality class of such a transition.

TL;DR: In this article, the effect of varying a parameter in the Hamiltonian of a quantum system which takes it across a quantum critical point or line was studied, and it was shown that quenching leads to the formation of defects whose density has a power-law dependence on the quench rate; the power depends on the dimensionalities of the system and of the critical surface and on some of the exponents associated with the critical point.