New paper on Majorana states in d-wave + spin-orbit coupling!

Guo-Qiao Zha, Lucian Covaci, F. M. Peeters, and Shi-Ping Zhou, Phys. Rev. B 90, 014522 (2014)

We found that the energy spectrum splits when the SO interaction is involved and the Majorana zero mode can be realized in the [100] edges of square systems for an appropriate SO coupling strength. Superconducting phase transitions appear when the energy gap closes, accompanied by energy jumps between different energy parabolas in the ground state, which provides a possible mechanism to support fractional flux periodicity of supercurrent..

New paper on Anderson localization in graphene!

J. H. Garcia, B. Uchoa, L. Covaci , T. G. Rappoport, Phys. Rev. B 90, 085425 (2014)

We address the nature of the disordered state that results from the adsorption of adatoms in graphene. For adatoms that sit at the center of the honeycomb plaquette, as in the case of most transition metals, we show that the ones that form a zero-energy resonant state lead to Anderson localization in the vicinity of the Dirac point. Among those, we show that there is a symmetry class of adatoms where Anderson localization is suppressed, leading to an exotic metallic state with large and rare charge droplets, that localizes only at the Dirac point.


3 of our plots are featured in the PRB Kaleidoscope

24 GPUs!

Part of Seastar: 20 GPUs soon to be integrated. Three Tyan FT72-B7015 cases with 13 GXT580, and 7 Tesla M2070. Made possible by Fonds Wetenschappelijk Onderzoek – Vlaanderen (FWO).

Hydra: CoolerMaster Case, Asus Supercomputer MotherBoard, 24Gb ram, 4 GeForce GTX580.

Presentation on CUDA

I recently gave 2 hours lecture on GPU computing and CUDA-C. The slides can be found here .

Hydra: New machine with 4 GPUs

We acquired a system with 4 Nvidia GTX 580 with a combined computing power of 6 TFlops.

Installed without problems Ubuntu 10.04 and CUDA-C libraries Thrust and Cusp .