QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: ams_nanolab on January 4, 2017, 22:50

Title: Peltier coefficient
Post by: ams_nanolab on January 4, 2017, 22:50

In the tutorial https://quantumwise.com/documents/tutorials/latest/Phonon/index.html/chap.thermoelectric.html

It's mentioned "For an undoped nanoribbon, the Fermi level is in the middle of the band gap. To get a significant Peltier coefficient, the Fermi level must be at a band edge, corresponding to a doped nanoribbon. The plugin allows for shifting the Fermi level, and Figure 7 shows the result for \Delta E_F = 0.08 eV, corresponding to an n-doped nanoribbon. "

What happens if it is a metallic nanoribbon? Do we still need doping for getting significant Peltier coeff. even though there are states at Ef=0 ?

Title: Re: Peltier coefficient
Post by: Jess Wellendorff on January 6, 2017, 10:26

No, the doping is only needed to move the Fermi level to a band edge. Should not be needed for a metal.

Title: Re: Peltier coefficient
Post by: ams_nanolab on January 6, 2017, 12:31

Thanks :)