Valence fluctuations and electric reconstruction in the extended Anderson model on the two-dimensional Penrose lattice
Abstract
We study the extended Anderson model on the two-dimensional Penrose lattice, combining the real-space dynamical mean-field theory with the noncrossing approximation. It is found that the Coulomb repulsion between localized and conduction electrons does not induce a valence transition, but the crossover between the Kondo and mixed valence states is in contrast to the conventional periodic system. In the mixed-valence region close to the crossover, nontrivial valence distributions appear, characteristic of the Penrose lattice, demonstrating that the mixed-valence state coexists with local Kondo states in certain sites. The electric reconstruction in the mixed valence region is also addressed.
- Publication:
-
Physical Review B
- Pub Date:
- April 2015
- DOI:
- 10.1103/PhysRevB.91.165114
- arXiv:
- arXiv:1502.03907
- Bibcode:
- 2015PhRvB..91p5114T
- Keywords:
-
- 75.20.Hr;
- Local moment in compounds and alloys;
- Kondo effect valence fluctuations heavy fermions;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 6pages, 7 figures. Submitted