Nature of the intensification of a cyclotron resonance in potassium in a normal magnetic field

TL;DR

This paper investigates the cyclotron resonance in potassium under a normal magnetic field, proposing that zero-curvature points on the Fermi surface influence the resonance peak observed.

Contribution

It introduces a novel explanation linking Fermi surface geometry, specifically zero-curvature points, to the cyclotron resonance behavior in potassium.

Findings

Resonance peak may be caused by zero-curvature points on the Fermi surface

Fermi surface geometry significantly affects cyclotron resonance

Provides a new perspective on electron dynamics in metals

Abstract

The cyclotron-resonance peak which has been observed [G. A. Baraff et al., Phys. Rev. Lett. 22, 590 (1969) ] in potassium in a magnetic field directed perpendicular to the surface may be due to an effect of zero-curvature points of the Fermi surface on the cyclotron orbit of effective electrons.