Back to Search
Start Over
Lifshitz transitions in a heavy Fermi liquid driven by short-range antiferromagnetic correlations in the two-dimensional Kondo lattice model.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Jan2011, Vol. 83 Issue 3, p33102:1-33102:4. 4p. - Publication Year :
- 2011
-
Abstract
- The heavy Fermi liquid with short-range antiferromagnetic correlations is carefully considered in the two- dimensional Kondo-Heisenberg lattice model. As the ratio of the local Heisenberg superexchange JH to the Kondo coupling JK increases, the topology of the Fermi surface (FS) of the heavy quasiparticles changes: at JH/JK = 0.1055 a first-order quantum phase transition is identified, where a small FS circle begins to emerge within the large deformed FS circle centered at (π, π). When JH/JK = 0.1425, the two deformed FS circles intersect each other and then decompose into four kidneylike Fermi pockets via a second-order quantum phase transition. As JH/JK increases further, the Fermi pockets are shifted inward along the direction (π, π) to (π/2,π/2), and the resulting FS is consistent with that obtained recently using the cluster dynamic mean-field approach to the Kondo lattice model in the presence of the antiferromagnetic order. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 83
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 66718448
- Full Text :
- https://doi.org/10.1103/PhysRevB.83.033102