Friedel oscillations,[1] named after French physicist Jacques Friedel, arise from localized perturbations in a metallic or semiconductor system caused by a defect in the Fermi gas or Fermi liquid.[2] Friedel oscillations are a quantum mechanical analog to electric charge screening of charged species in a pool of ions. Whereas electrical charge screening utilizes a point entity treatment to describe the make-up of the ion pool, Friedel oscillations describing fermions in a Fermi fluid or Fermi gas require a quasi-particle or a scattering treatment. Such oscillations depict a characteristic exponential decay in the fermionic density near the perturbation followed by an ongoing sinusoidal decay resembling sinc function. In 2020, magnetic Friedel oscillations were observed on a metal surface.[3][4]
- ^ W. A. Harrison (1979). Solid State Theory. Dover Publications. ISBN 978-0-486-63948-2.
- ^ "Friedel Oscillations: wherein we learn that the electron has a size". Gravity and Levity. June 2, 2009. Retrieved December 22, 2009.
- ^ Mitsui, T. and Sakai, S. and Li, S. and Ueno, T. and Watanuki, T. and Kobayashi, Y. and Masuda, R. and Seto, M. and Akai, H. (2020). "Magnetic Friedel Oscillation at the Fe(001) Surface: Direct Observation by Atomic-Layer-Resolved Synchrotron Radiation Mössbauer Spectroscopy". Phys. Rev. Lett. 125 (23): 236806. doi:10.1103/PhysRevLett.125.236806. PMID 33337194. S2CID 229318516.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Michael Schirber. "Magnetic Oscillations at a Metal Surface". APS physics.
