Quasiperiodically driven fermionic systems can support topological phases not realized in equilibrium. The fermions are localized the bulk, but quantized energy currents at edge. These were discovered through an abstract classification, and few microscopic models exist. We develop a coupled layer construction for tight-binding of these $d\ensuremath{\in}{1,2}$ spatial dimensions, with any numbe...

The physics of spin currents has always attracted the attention Professor Rashba who made seminal contributions to field. Here, authors develop theory and valley Hall effects in systems interacting fermions bosons. In high-mobility two-dimensional semiconductors, interparticle scattering dominates over impurity phonon controls transport effects. demonstrate theoretically that collisions between...

The two-dimensional metal forming at the interface between an oxide insulator and SrTiO_{3} provides new opportunities for oxide electronics. However, the quantum Hall effect, one of the most fascinating effects of electrons confined in two dimensions, remains underexplored at these complex oxide heterointerfaces. Here, we report the experimental observation of quantized Hall resistance in a Sr...

Antiferromagnet (AFM) spintronics with reduced electrical current is greatly expected to process information with high integration and low power consumption. In Pt/FeMn and Ta/FeMn hybrids, we observe significant resistance variation (up to 7% of the total resistance) manipulated by 10(5) A/cm(2) dc current. We have excluded the contribution of isotropic structural effects, and confirmed the cr...

Hall effects on the MHD Couette flow between two infinite horizontal parallel porous plates in a rotating system under the boundary layer approximations have been studied. One of the plate is held at rest and the other one moves with uniform velocity. An exact solution of governing equation has obtained in closed form. Asymptotic behavior of the solution has analyzed for large values of magneti...

We assessed the forgetting of friends and its effects on measuring personal and social network characteristics and properties. All 217 residents of a university residence hall first recalled as many of their friends in the hall as they could. Then, on a complete list of hall residents, residents indicated other friends they forgot to recall. On average, residents forgot 20% of their friends. Re...