Superconductivity arises from pairing of electrons on the Fermi surface. Professors Jenny Hoffman and Subir Sachdev, with colleagues from Harvard, MIT, Nagoya University, and Northeastern University report in Science that they used Fourier transform STM to map a small-to-large Fermi surface transition in the cuprate superconductor Bi2-yPbySr2-xLaxCuO6+d, demonstrating a quantum critical point near optimal doping at zero field. The researchers showed that superconductivity coexists with the pseudogap on the recovered antinodal Fermi surface above optimal doping.
Professors Hoffman, Sachdev are at the forefront of cutting-edge research on high-energy superconductors. Read: N. Wolchover, "Decoding the Secrets of Superconductivity," Quanta Magazine (20 April 2014).
Dr. Dalla Torre was awarded the Alon Fellowship for young faculty members by the Israeli Council for Higher Education. He is currently a post-doctorate fellow at the Department of Physics, in the group of Prof. Eugene Demler, and an ITAMP fellow. Next year Dr. Dalla Torre is heading to Bar Ilan University. His research focuses on the non-equilibrium dynamics of many-body systems; more details can be obtained from his (future) group's website at http://www.nonequilibrium.org .
Past studies have identifed a spatially extended excess of 1-3 GeV gamma rays from the region surrounding the Galactic Center, consistent with the emission expected from annihilating dark matter. Harvard Physics grad student Tansu Daylan, Prof. Douglas Finkbeiner, and researchers from Fermilab, University of Chicago, MIT, and Princeton revisited and scrutinized this signal with the intention of further constraining its characteristics and origin.
The BICEP2 Collaboration, led by Professor John Kovac, has announced the discovery of first direct evidence of cosmic inflation, the expansion of space first proposed in 1981 by Alan Guth of MIT. The latest results came from observations by the BICEP2 telescope of the cosmic microwave background, a faint glow left over from the Big Bang.