Abstract
We examine the validity of Fermi-liquid theory in the low-density two-dimensional Hubbard model. From the ground-state energy we obtain the quasiparticle energy and the Landau interaction function. Then we prove that the quasiparticle-interaction function is finite and that the quasiparticle residue is nonzero for repulsive interactions. We also find, as a function of the excitation energy ε, that the quasiparticle lifetime ∼1/ ε2lnε. Hence, we conclude that Fermi-liquid theory holds in our model.
| Original language | English |
|---|---|
| Pages (from-to) | 10567-10570 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 48 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - 1993 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Fermi-liquid theory in the low-density two-dimensional Hubbard model. / Yarlagadda, Sudhakar; Kurihara, Susumu.
In: Physical Review B, Vol. 48, No. 14, 1993, p. 10567-10570.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fermi-liquid theory in the low-density two-dimensional Hubbard model
AU - Yarlagadda, Sudhakar
AU - Kurihara, Susumu
PY - 1993
Y1 - 1993
N2 - We examine the validity of Fermi-liquid theory in the low-density two-dimensional Hubbard model. From the ground-state energy we obtain the quasiparticle energy and the Landau interaction function. Then we prove that the quasiparticle-interaction function is finite and that the quasiparticle residue is nonzero for repulsive interactions. We also find, as a function of the excitation energy ε, that the quasiparticle lifetime ∼1/ ε2lnε. Hence, we conclude that Fermi-liquid theory holds in our model.
AB - We examine the validity of Fermi-liquid theory in the low-density two-dimensional Hubbard model. From the ground-state energy we obtain the quasiparticle energy and the Landau interaction function. Then we prove that the quasiparticle-interaction function is finite and that the quasiparticle residue is nonzero for repulsive interactions. We also find, as a function of the excitation energy ε, that the quasiparticle lifetime ∼1/ ε2lnε. Hence, we conclude that Fermi-liquid theory holds in our model.
UR - http://www.scopus.com/inward/record.url?scp=21444431731&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=21444431731&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.48.10567
DO - 10.1103/PhysRevB.48.10567
M3 - Article
AN - SCOPUS:21444431731
VL - 48
SP - 10567
EP - 10570
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 14
ER -