New theoretical work shows that in two-dimensional condensed matter systems, one-dimensional processes such as forward or backward scattering have a dramatic effect on the physical behavior of fermions near a quantum critical point and derail attempts to get an accurate description of a non-Fermi-liquid.
Time-resolved laser spectroscopy of a high-transition-temperature superconductor shows that excited electrons and phonons both relax very quickly on ultrafast time scales and to some extent independently.
A little-known and subtle optical effect in combination with state-of-the-art pulsed laser techniques holds considerable promise as a sensitive way to study physical properties (including spin phenomena) in nanometer scale structures.
New torsional oscillator experiments with plastically deformed helium show that what was thought to be defect-controlled supersolidity at low temperature may in fact be high-temperature softening from nonsuperfluid defect motion in the crystalline structure.
New analyses suggest strategies by which biological sensors may be able to measure changes in concentrations of chemical signaling molecules more accurately, but does this reflect what actually happens in nature?