Negative differential conductance in nanojunctions: A current constrained approach

Conductance of Pd-H Nanojunctions

016802-1 Results of an experimental study of palladium nanojunctions in a hydrogen environment are presented. Two new hydrogen-related atomic configurations are found, which have conductances of 0:5 and 1 quantum unit (2e2=h). Phonon spectrum measurements demonstrate that these configurations are situated between electrodes containing dissolved hydrogen. The crucial differences compared to the ...

Conductance enlargement in picoscale electroburnt graphene nanojunctions.

Provided the electrical properties of electroburnt graphene junctions can be understood and controlled, they have the potential to underpin the development of a wide range of future sub-10-nm electrical devices. We examine both theoretically and experimentally the electrical conductance of electroburnt graphene junctions at the last stages of nanogap formation. We account for the appearance of ...

Shot noise in negative-differential-conductance devices

Shot noise: Fluctuations of the current flowing through a device that result from the discreteness of the charge carrier. Shot noise provides information on the charge carriers and the transport mechanism in the device. The shot noise measurements in semiconductor heterostructure devices shed light on how the devices operate, beyond information provided by the electrical conductance. The shot n...

Negative differential thermal conductance through vacuum

We propose a scheme for achieving negative differential thermal conductance in near-field electromagnetic thermal transfer. As an example, we show that the scheme can be implemented with two slabs of silicon carbide brought in close proximity to each other. We also describe how a bistable thermal switch can be constructed in this manner. VC 2012 American Institute of Physics. [doi:10.1063/1.367...

Conductance crossovers in coherent surface transport on Y nanojunctions