Replica study of pinned bubble crystals

Pinned bilayer Wigner crystals with pseudospin magnetism

We study a model of pinned bilayer Wigner crystals WC and focus on the effects of interlayer coherence IC on pinning. We consider both a pseudospin ferromagnetic WC FMWC with IC and a pseudospin antiferromagnetic WC AFMWC without IC. Our central finding is that a FMWC can be pinned more strongly due to the presence of IC. One specific mechanism is through the disorder induced interlayer tunneli...

Acoustically bound microfluidic bubble crystals.

Bubbles confined in microchannels self-organize without directly contacting one another when excited by an external acoustic field. The bubbles tend to form periodic "crystal"-like lattices with a finite interbubble distance. This equilibrium distance can be adjusted by simply tuning the acoustic frequency. This new type of crystal is purely mediated by acoustic surface waves emitted by the pul...

Design and characterization of bubble phononic crystals

Subnanometer replica molding of molecular steps on ionic crystals.

Replica molding with elastomeric polymers has been used routinely to replicate features less than 10 nm in size. Because the theoretical limit of this technique is set by polymer-surface interactions, atomic radii, and accessible volumes, replication at subnanometer length scales should be possible. Using polydimethylsiloxane to create a mold and polyurethane to form the replica, we demonstrate...

Replica Symmetry Breaking in Renormalization: Application to the Randomly Pinned Planar Flux Array

Trie randomly pinned planar flux bne array is supposed to show a phase transition to a vortex glass phase at low temperatures. This transition bas been examined by using a mapping onto a 2D XY-mortel with random anisotropy but without vortices and applying a