Phenomenological evidence for the phonon Hall effect

In the electrical Hall effect, a magnetic field, applied perpendicular to an electrical current, induces through the Lorentz force a voltage perpendicular to the field and the current. It is generally assumed that an analogous effect cannot exist in the phonon thermal conductivity, as there is no charge transport associated with phonon propagation. In this Letter, we argue that such a magnetotransverse thermal effect should exist and experimentally demonstrate this "phonon Hall effect" in Tb3Ga5O12.     

Modeling of the Dielectric Breakdown Under Strong Magnetic Fields

The formation of breakdown pattern on an insulating surface under the influence of a transverse magnetic field is theoretically investigated. We have generalized the Dielectric Breakdown Model (DBM) and random walker model for the case of external magnetic field. It is shown that fractal dimensionality of the discharge saturates with magnetic fields. It is conjectured that nonlinear current interaction is responsible for the experimentally observed spider-legs like streamer patterns.     

Ring-shaped vortex domain in type-II superconductors

We present results of experiments in superconducting niobium and numerical simulations showing the creation of a metastable ring-shaped vortex domain by heating. Such vortex rings, if pinned by structural defects, can exist forever.     

Photon assisted tunneling in superconductor-normal metal point contacts at far-infrared frequencies

The response of normal metal-superconductor point contacts to radiation at frequencies up to 2.5 THz is studied experimentally. The results can be analyzed in terms of the so called Photon Assisted Tunneling (PAT) effect and are in excellent agreement with recent theoretical predictions.     

Magnetoelectric effect in samarium molybdate

This paper reports on the nonlinear magnetoelectric effect (MEE) in the orthorhombic ferroelectric ferroelastic β′ phase of samarium molybdate Sm₂(MoO₄)₃ observed in magnetic fields up to 20 T and temperatures from 4.4 to 0.43 K. The magnetic-field-induced electric polarization in Sm₂(MoO₄)₃ is an order of magnitude larger than that in isomorphic Gd₂(MoO₄)₃. This provides support for the magnetostriction mechanism proposed by us for the MEE in rare-earth molybdates. The polarization in Sm₂(MoO₄)₃ was found to fall off with time. The relaxation time constant τ increases with decreasing temperature from τ=10² s at T=4.4 K to τ≈10³ s at T=0.43 K.