Avalanches in vanadium sesquioxide nanodevices

Multi-orbital effects in optical properties of vanadium sesquioxide.

Vanadium sesquioxide, V(2)O(3), boasts a rich phase diagram whose description necessitates accounting for many-body Coulomb correlations. The spectral properties of this compound have been successfully addressed within dynamical mean field theory to the extent that results of recent angle-resolved photoemission experiments have been correctly predicted. While photoemission spectroscopy probes t...

Multiple avalanches across the metal-insulator transition of vanadium oxide nanoscaled junctions.

The metal-insulator transition of nanoscaled VO2 devices is drastically different from the smooth transport curves generally reported. The temperature driven transition occurs through a series of resistance jumps ranging over 2 decades in magnitude, indicating that the transition is caused by avalanches. We find a power law distribution of the jump sizes, demonstrating an inherent property of t...

Transport in multiterminal graphene nanodevices.

We study the transport properties of multiterminal graphene nanodevices using the Landauer-Buttiker approach and the tight binding model. We consider a four-terminal device made at the crossing of a zigzag and armchair nanoribbons and two types of T-junction devices. The transport properties of graphene multiterminal devices are highly sensitive to the details of the junction region. Thus the p...

Snow Avalanches, Ice Avalanches and Glacier Surges

Self-Replicating DNA Nanostructures: Autocatalytic Nanodevices derived from Catalytic Nanodevices

This paper describes some general techniques for transforming the design of a class of catalytic DNA nanodevices into the design for autocatalytic DNA nanodevices. Our techniques are particularly applicable to catalytic DNA nanodevices that act as detectors, where we would like their response to be sped up via autocatalytic behavior. We provide an example of this general scheme for design of au...