Role of angular orientation of dipoles on work function during cesium deposition on a metal surface – A phenomenological model | Zendy

Pranjal Singh | Zendy; M. Bandyopadhyay | Zendy

Open Access

Role of angular orientation of dipoles on work function during cesium deposition on a metal surface – A phenomenological model

Author(s) -

Pranjal Singh,

M. Bandyopadhyay

Publication year - 2018

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.5083726

Subject(s) - work function , tungsten , phenomenological model , dipole , work (physics) , orientation (vector space) , caesium , atom (system on chip) , monolayer , function (biology) , atomic physics , substrate (aquarium) , materials science , condensed matter physics , physics , metal , geometry , thermodynamics , quantum mechanics , nanotechnology , mathematics , nuclear physics , oceanography , evolutionary biology , biology , geology , computer science , metallurgy , embedded system

In our present study we try to establish a phenomenological model based on classical dipole picture to depict the anomalous variation of work-function of a cesiated tungsten surface in terms of cesium coverage. We have shown that angular orientation of the dipoles created between adsorbed Cs atom and W substrate atom may play a role to determine the absolute work function values at higher coverage. A fitting formula is identified based on classical model by incorporating the angular orientation factor. This phenomenological model fits well with the previous experimental results and the density function theory based calculations up to 0.8 monolayer.In our present study we try to establish a phenomenological model based on classical dipole picture to depict the anomalous variation of work-function of a cesiated tungsten surface in terms of cesium coverage. We have shown that angular orientation of the dipoles created between adsorbed Cs atom and W substrate atom may play a role to determine the absolute work function values at higher coverage. A fitting formula is identified based on classical model by incorporating the angular orientation factor. This phenomenological model fits well with the previous experimental results and the density function theory based calculations up to 0.8 monolayer.

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