The Holstein polaron: results from numerical and analytical ... - PiTP
The Holstein polaron: results from numerical and analytical ... - PiTP
The Holstein polaron: results from numerical and analytical ... - PiTP
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weak coupling, g = “small” low-energy eigenstates of known k:<br />
with eigenenergies (for k< k cross )<br />
E k<br />
<strong>The</strong> phonons can be<br />
quite far spatially <strong>from</strong> the<br />
electron large <strong>polaron</strong><br />
<strong>polaron</strong> + one- phonon<br />
continuum (finite lifetimes)<br />
k<br />
Ω<br />
<strong>polaron</strong> b<strong>and</strong> (infinitely<br />
long-lived quasiparticle)<br />
high-k: wavefunction<br />
dominated by el+1ph<br />
contributions<br />
low-k: wavefunction dominated<br />
by free electron contribution
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