---------- Forwarded message ---------- From: meysam pazoki <meysam.paz...@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 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.democritos.it/pipermail/pw_forum/attachments/20110219/574535da/attachment.htm