Quantized conductance in an atom-sized point contact

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Quantized conductance in atom-sized wires between two metals.

Quantized ionic conductance in nanopores.

Ionic transport in nanopores is a fundamentally and technologically important problem in view of its occurrence in biological processes and its impact on novel DNA sequencing applications. Using molecular dynamics simulations we show that ion transport may exhibit strong nonlinearities as a function of the pore radius reminiscent of the conductance quantization steps as a function of the transv...

Doubling of conductance steps in Si/SiO2 quantum point contact

Conductance enhancement in quantum-point-contact semiconductor-superconductor devices

We present numerical calculations of the conductance of an interface between a phase-coherent twodimensional electron gas and a superconductor with a quantum point contact in the normal region. Using a scattering matrix approach we reconsider the geometry of De Raedt, Michielsen, and Klapwijk @Phys. Rev. B 50, 631 ~1994!# which was studied within the time-dependent Bogoliubov–de Gennes formalis...