Physics – Condensed Matter
Scientific paper
1993-09-08
Physics
Condensed Matter
47 pages, REVTEX 3.0, 14 postscript figures available form cond-mat@babbage.sissa.it (submitted using the figures-command)
Scientific paper
10.1103/PhysRevB.49.10926
We discuss the transition from a metal to charge or spin insulating phases characterized by the opening of a gap in the charge or spin excitation spectra, respectively. These transitions are addressed within the context of two exactly solvable Hubbard and tJ chains with long range, $1/r$ hopping. We discuss the specific heat, compressibility, and magnetic susceptibility of these models as a function of temperature, band filling, and interaction strength. We then use conformal field theory techniques to extract ground state correlation functions. Finally, by employing the $g$-ology analysis we show that the charge insulator transition is accompanied by an infinite discontinuity in the Drude weight of the electrical conductivity. While the magnetic properties of these models reflect the genuine features of strongly correlated electron systems, the charge transport properties, especially near the Mott-Hubbard transition, display a non-generic behavior.
Gebhard Florian
Girndt Andreas
Ruckenstein Andrei E.
No associations
LandOfFree
Charge and Spin Gap Formation in Exactly Solvable Hubbard Chains with Long-Rang Hopping does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Charge and Spin Gap Formation in Exactly Solvable Hubbard Chains with Long-Rang Hopping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge and Spin Gap Formation in Exactly Solvable Hubbard Chains with Long-Rang Hopping will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-497285