We argue that negative critical currents arise generically in Josephson junctions formed by single channel conductors. Specifically, we theoretically study the coupling between two superconducting leads connected a one-dimensional conductor Coulomb blockade regime. show clean regime sign of current alternates with number electrons normal region. For odd occupancy is even when on large.

We analyze a Hanbury Brown-Twiss geometry in which particles are injected from two independent sources into a mesoscopic conductor in the quantum Hall regime. All partial waves end in different reservoirs without generating any single-particle interference; in particular, there is no single-particle Aharonov-Bohm effect. However, exchange effects lead to two-particle Aharonov-Bohm oscillations ...

The pressure-temperature phase diagram of the organic Mott insulator kappa-(ET)2Cu2(CN)3, a model system of the spin liquid on triangular lattice, has been investigated by 1H NMR and resistivity measurements. The spin-liquid phase is persistent before the Mott transition to the metal or superconducting phase under pressure. At the Mott transition, the spin fluctuations are rapidly suppressed an...

some organic molecules can be isomerized upon photoirradiation and when accompanied by a change in the visible absorption spectrum, it is called photochromism. azobenzenes are important part of molecular machines and nanotechnology, which are this phenomenon is called photoisomerization azobenzene (azo) chromophores , and have been incorporated into a wide variety of materials and molecular arc...

We discuss the main characteristics that must be satisfied by Josephson junctions for metrological applications and, specifically, in the development of voltage standards of new generation. Data reported in the literature for the most established technologies, like SNS (Superconductor-Normal conductor-Superconductor), SINIS (SuperconductorInsulator-Normal conductor-Insulator-Superconductor) and...