天美传媒

New research by Drs. J. Sloan, D. Quigley and PhD student Sam Marks in Warwick, Drs. P. Mederios and A. J. Morris in Cambridge and Dr. Q. Ramasse at STFC SuperSTEM confirm the formation of metallic ‘Extreme Nanowires’ (ENs) of single atom width tellurium atomic chains in ultra-narrow Single Walled Carbon Nanotubes. We combined state-of-the-art imaging techniques and 1D-adapted ab initio structure prediction to treat both confinement and periodicity effects. The studied Te ENs adopt a variety of structures, exhibiting a true 1D realization of a Peierls structural distortion and transition from metallic to insulating behavior as a function of encapsulating diameter as well as the formation of discrete atomic coils of metallic tellurium.

The shock fronts of waves and plasma motions in the Sun'’s atmosphere produce radio emission via accelerated electrons. We analyse a series of quasi-periodic waves and the related radio features.

The quantum Hall effect is a test case for a complex quantum system. The presence of many electrons leads to the formation of highly non-trivial dynamics and so-called collective phenomena. Usually, however, it is the fractional quantum Hall effect at extremely strong magnetic fields where many-body effects take centre stage, leading to the formation of quasi-particles. In a new work [EPL 117, 57009 (2017)], Oswald and Roemer show that already in the integer quantum Hall effect at weaker magnetic fields, the interactions play a dominant role.

Novel work by the group of Prof. Lynne Macaskie (Biosciences, University of Birmingham), utilising the Warwick XPS Facility, has demonstrated that bio-metallic catalysts can be used to upgrade heavy oil in to lighter, more commercially-viable products in a more efficient way than current catalysts.