Eran Sela

Thermopower of single-molecule devices

We investigate the thermopower of single molecules weakly coupled to metallic leads. We model the molecule in terms of the relevant electronic orbitals coupled to phonons corresponding to both internal vibrations and to oscillations of the molecule as a whole. The thermopower is computed by means of rate equations including both sequential-tunneling and cotunneling processes. Under certain conditions, the thermopower allows one to access the electronic and phononic excitation spectrum of the molecule in a linear-response measurement. In particular, we find that the phonon features are more pronounced for weak lead-molecule coupling. This way of measuring the excitation spectrum is less invasive than the more conventional currentvoltage characteristic, which, by contrast, probes the system far from equilibrium.

Fractional shot noise in the kondo regime

Transport through quantum dots in the Kondo regime obeys an effective low-temperature theory in terms of weakly interacting quasiparticles. Despite the weakness of the interaction, we find that the backscattering current and hence the shot noise are dominated by two-quasiparticle scattering. We show that the simultaneous presence of one- and two-quasiparticle scattering results in a universal average charge 5/3e as measured by shot-noise experiments. An experimental verification of our prediction would constitute a most stringent test of the low-energy theory of the Kondo effect.

Nonequilibrium charge-Kondo transport through negative- U molecules

Low-temperature transport through molecules with effectively negative charging energy

Fractional helical liquids in quantum wires

U

Two-channel Kondo physics in two-impurity Kondo models.

exhibits a charge-Kondo effect. We explore this regime analytically by establishing an exact mapping between the negative-

Universal low-temperature crossover in two-channel Kondo models

U

Topological Fractional Pumping with Alkaline-Earth-Like Atoms in Synthetic Lattices

and the positive-

Order-by-disorder and spin-orbital liquids in a distorted Heisenberg-Kitaev model

U

Adiabatic pumping in interacting systems.

Anderson models, which is suitable for the description of nonequilibrium transport. We employ this mapping to demonstrate the intimate relation between nonequilibrium transport in the spin-Kondo and charge-Kondo regimes, and derive analytical expressions for the nonlinear current-voltage characteristics as well as the shot noise in the latter regime. Applying the mapping in the opposite direction, we elucidate the finding of super-Poissonian noise in the positive-

Chiral currents in one-dimensional fractional quantum Hall states

U