Document Type
Article
Publication Date
May 2010
Publication Title
Physical Review B
Volume
81
Issue Number
20
DOI
10.1103/PhysRevB.81.201101
Keywords
Quantum, Two dimensional, Hubbard, Model, Temperature, Limit, Critical
Disciplines
Astrophysics and Astronomy | Physical Sciences and Mathematics | Physics
Abstract
We investigate the two-dimensional Hubbard model with next-nearest-neighbor hopping, t′, using the dynamical cluster approximation. We confirm the existence of a first-order phase-separation transition terminating at a second-order critical point at filling nc(t′) and temperature Tps(t′). We find that as t′ approaches zero, Tps(t′) vanishes and nc(t′) approaches the filling associated with the quantum critical point separating the Fermi liquid from the pseudogap phase. We propose that the quantum critical point under the superconducting dome is the zero-temperature limit of the line of second-order critical points.
Recommended Citation
Ehsan Khatami, K. Mikelsons, D. Galanakis, A. Macridin, J. Moreno, R. Scalettar, and M. Jarrell. "Quantum criticality due to incipient phase separation in the two-dimensional Hubbard model" Physical Review B (2010). https://doi.org/10.1103/PhysRevB.81.201101
Comments
This article originally appeared in Physical Review B, volume 81, issue 20, 2010, published by the American Physical Society. ©2010 American Physical Society. The article can also be found online at this link.
SJSU users: use the following link to login and access the article via SJSU databases