PtSn4 tagged posts

Experimental and calculated structure of the Fermi surface and band dispersion of PtSn4.

Physicists have discovered a topological metal, PtSn4 (platinum and tin), with a unique electronic structure that may someday lead to energy efficient computers with increased processor speeds and data storage. The electrons in topological quantum materials can travel close to speed of light thanks to unique property Dirac dispersion. Up until now, only isolated points, called Dirac points, with relatively small numbers of conduction electrons, were known to exist in such materials. In PtSn4, the scientists not only discovered a high density of conduction electrons, but also large number of closely positioned Dirac points forming extended lines or Dirac node arcs.

Kaminski and his ARPES equipment.

“Thi...