As each energy level passes through the Fermi energy, it depopulates, causing the material's transport and thermodynamic properties to oscillate periodically, producing a measurable oscillation in the material's conductivity.
As each energy level passes through the Fermi energy, it depopulates as the electrons become free to flow as current. This causes the material's transport and thermodynamic properties to oscillate periodically, producing a measurable oscillation in the material's conductivity.