Theory of Larmor waves

A theory of Larmor waves (recently discovered by Janossy and Monod) is presented, which takes account of Fermi-liquid interactions (that can be measured by measuring the frequency of the Larmor-wave oscillations), Fermi-surface anisotropy, and of $g$-tensor anisotropy. Exact results are presented for cylindrically symmetric Fermi surfaces, as well as approximate results for general Fermi surfaces (including effects due to open orbits). A prediction of the Larmor-wave spectrum for potassium is made.