Emergence of a Common Energy Scale Close to the Orbital-Selective Mott Transition

作者：Greger Markus^*; Kollar Marcus; Vollhardt Dieter

来源：Physical Review Letters, 2013, 110(4): 046403.

DOI：10.1103/PhysRevLett.110.046403

We calculate the spectra and spin susceptibilities of a Hubbard model with two bands having different bandwidths but the same on-site interaction, with parameters close to the orbital-selective Mott transition, using dynamical mean-field theory. If the Hund%26apos;s rule coupling is sufficiently strong, one common energy scale emerges which characterizes both the location of kinks in the self-energy and extrema of the diagonal spin susceptibilities. A physical explanation of this energy scale is derived from a Kondo-type model. We infer that for multiband systems local spin dynamics rather than spectral functions determine the location of kinks in the effective band structure. DOI: 10.1103/PhysRevLett.110.046403

• 出版日期2013-1-23