Observation of Conduction-Electron Density Oscillations at the Surface of Platinum Particles

I. Yu; A. A. V. Gibson; E. R. Hunt; W. P. Halperin

doi:10.1103/PhysRevLett.44.348

Observation of Conduction-Electron Density Oscillations at the Surface of Platinum Particles

I. Yu, A. A. V. Gibson, E. R. Hunt, and W. P. Halperin

Phys. Rev. Lett. 44, 348 – Published 4 February 1980

Abstract

Anomalously large ${}^{195}{Pt}$ NMR linewidths have been observed in platinum particles with diameters ranging from 33 Å to 200 Å. Spin-echo measurements revealed the presence of nuclear spin-exchange diffusion in large magnetic field gradients attributable to the large indirect exchange interaction in platinum. These data indicate that there are electron spin-density oscillations near the platinum surface consistent with a simple model ascribing free-electron behavior to the $s$ -like conduction electrons.

Received 1 August 1979

DOI:https://doi.org/10.1103/PhysRevLett.44.348

Authors & Affiliations

I. Yu, A. A. V. Gibson^*, E. R. Hunt^†, and W. P. Halperin

Department of Physics and Astronomy and Materials Research Center, Northwestern University, Evanston, Illinois 60201

^*Present address: Department of Physics, Texas A & M University, College Station, Tex. 77843.
^†Permanent address: Department of Physics, Ohio University, Athens, Ohio 45701.