Superconducting junction with resonant tunneling

Resonant tunneling through a C60 molecular junction in liquid environment

We present electronic transport measurements through thiolated C60 molecules in liquid environment. The molecules were placed within a mechanically controllable break junction using a single anchoring group per molecule. When varying the electrode separation of the C60-modified junctions, we observed a peak in the conductance traces. The shape of the curves is strongly influenced by the environ...

Resonant transmission in the base/collector junction of a bipolar quantum-well resonant-tunneling transistor

A new transistor effect is demonstrated in a 120 nm base, bipolar quantum-well, resonanttunneling transistor (BiQuaRTT) . In this BiQuaRTT, a strong, multiple negative differential resistance (NDR) characteristic is obtained at room temperature with highcurrent gain ( > 50). The effect is shown to be the consequence of an asymmetric, quantumwell-base heterostructure whose shape is controlled by...

THz resonant-tunneling diodes

Resonant Tunneling throughQuantumDots

Motivated by recent experiments we analyse a new setup of capacitively coupled semiconductor quantum dots. We identify a region where Kondo-assisted tunneling should be observable. We nd an eeective mapping to a single quantum dot with controllable multi-level structure. We study electron transport through strongly coupled quantum dots in the presence of strong Coulomb repulsion and coupling to...

Resonant Tunneling and Resonant Excitation Transfer

Issues involved in the tunneling of deuterons in metal deuterides are considered in relation to experimental claims of anomalies in metal deuterides. From earlier studies, screening is thought to be similar to the case of molecular D2. Resonant tunneling has been advocated in the literature as a possible mechanism to achieve tunneling enhancements. We develop a two-level system for a piecewise ...