X-Nico

Spin density wave

The concept of a nesting vector is illustrated in the Figure for the famous case of Cr, which transitions from a paramagnetic to SDW state at a Néel temperature of 311 K. Cr is a body-centered cubic metal whose Fermi surface features many parallel boundaries between electron pockets centered at $\backslash Gamma$ and hole pockets at H. These large parallel regions can be spanned by the nesting wavevector $q$ shown in red.

Heinz Maier-Leibnitz

Maier-Leibnitz was instrumental, along with Louis Néel, in bringing about the German-French project to construct a high-flux neutron source and found the Institut Laue-Langevin in Grenoble in 1967, named in honor of the physicist Max von Laue and Paul Langevin.

see also