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SUMMARY:Fundamental physics in field electron emission - Prof. Shidong Lia
 ng\, School of Physics\, Sun Yat-Sen University\, Guangzhou\, China
DTSTART:20160407T100000Z
DTEND:20160407T110000Z
UID:TALK65508@talks.cam.ac.uk
CONTACT:Dr Christopher John Edgcombe
DESCRIPTION:Field electron emission plays an important role in the vacuum 
 electronic technology. The recent advantage in the experimental technology
  of field emission inspires us to think about some fundamental physics in 
 field emission. In this talk\, I shall present four topics. The first is h
 ow to identify the image potential for non-metallic emitter. I propose a s
 cheme to distinguish whether the image potential exists in non-metallic em
 itter. The second is the theoretical studies on the basic principles of th
 e spin-polarized field emission. I study two basic models of the spin-pola
 rized field emission to find out some hints for the experimental investiga
 tion of the spin-polarized field emission. In the third topic\, I shall pr
 opose a scheme to estimate the quantum tunneling time based on field emiss
 ion. Finally\, I shall talk about some fundamental problems and difficulti
 es in the interplay between experiment and theory in field emission. 
LOCATION:Centre for Mathematical Sciences\, meeting room MR2
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