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2009.01.21-ECE659-L4-notes

2009.01.21-ECE659-L4-notes - ECE 659 Quantum Transport Atom...

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ECE 659 Quantum Transport: Atom to Transistor Lecture 4: LandauerModel SupriyoDatta Spring 2009 Notes prepared by SamiranGanguly
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S D L Vd Vg E μ2 μ1 μ 1-μ2=qVd γ γ ( 29( 29 1 2 q I dET E f f h = - μ1 μ2 D(E) f1(E) f2(E) Energy lost = μ1-μ2=qVd ( 29 2 q f G dE T E h E = - Usual expression verticalbraceleft , n A q G qn L m μ σ τ σ = = gives the idea that all electrons conduct verticalbraceright verticalbraceleft 2 z z v Dv T M L τ λ λ =
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Limits of linearity of I-V characteristics E-μ<kT Limit of non linearity: 25 2.5 / 0.1 mV KV cm m μ = Breakdown fields: 5 1 10 / 0.1 V V cm
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