Metal - - screening screening Metal Thomas-Fermi (static) - - PowerPoint PPT Presentation

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Oct 19, 2022 254 likes •322 views

Metal - - screening screening Metal Thomas-Fermi (static) screening potential of point charge Fourier Coulomb renormalize Fourier - + Yukawa - Metal - - screening screening Metal static dielectric function singularity at 2k F

SLIDE 1

Metal Metal

screening

screening

Thomas-Fermi (static) screening

potential of point charge

Fourier Fourier

renormalize

Coulomb Yukawa

+

SLIDE 2

Metal Metal

screening

screening

static dielectric function

singularity at 2kF 1D 2D 3D dielectric function in 3D singular at 2kF , unlike

small-q approximation

SLIDE 3

Metal Metal

screening

screening

Friedel oscillation

charge redistribution point charge

most singular

part

2x integration by parts

SLIDE 4

Metal Metal

screening

screening

Friedel oscillation

scillations

SLIDE 5

Metal Metal

screening

screening

Friedel oscillation

total charge cloud point charge at completely compensated

scanning tunneling microscope - pictures

NTT: report 2000 - 2D semiconductor surface

quantum corral by Fe-atoms on Cu surface

D. Eigler, IBM Almaden