[Pw_forum] Fermi Energy Caculation

jia chen jiachen at princeton.edu
Sat Feb 19 18:39:45 CET 2011

Dear Pazoki,

You can calculate work function for certain surfaces in pp.

Best Wishes

On Sat, Feb 19, 2011 at 8:04 AM, meysam pazoki
<m_pazoki at physics.sharif.edu> wrote:
> ---------- Forwarded message ----------
> From: meysam pazoki <meysam.pazoki at gmail.com>
> Date: Sat, Feb 19, 2011 at 4:33 PM
> Subject: Re: Fermi Energy Caculation
> To: pw_forum at pwscf.org
> Dear xirainbow
> Thanks for your comment. Each semiconductor have a fermi energy level.
> The exact value of fermi energy (relative to vaccum level) depicts that the contact of this semiconductor with Au(for example) is Schottky or ohmic.
> Or for example when this semiconductor is in contact with a Red/Ox electrolyte ,what is the length of double layer ?
> This is duo to when a metal and a semiconductor are in contact, in equilibrium the fermi energy of two systems should be identical(Fermi energy  (with good approximation) is equal to chemical potential. Chemical potential is energy of adding 1 electron to the system.In equilibrium there is no electronic current between two parts. )
> But when you work with two samples in contact to each other you need to know the value of fermi energy relative to vaccum.
> Best wishes
> meysam
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Jia Chen

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