Charge Density Waves and Bond Order Waves in a quarter filled extended Hubbard ladder

Details Charge Density Waves and Bond Order Waves in a quarter filled extended Hubbard ladder Charge Density Waves and Bond Order Waves in a quarter filled extended Hubbard ladder

2003-02-17

arxiv.org/abs/cond-mat/0302326v3

Eur. Phys. J. B 33 p. 419 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX 4, 28 pages, 16 EPS figures (v2: fixed documentclass), (v3: corr. in Sec. VI B 2)

Scientific paper

10.1140/epjb/e2003-00183-6

We investigate the phase diagram of a quarter filled Hubbard ladder with nearest-neighbor Coulomb repulsion using bosonization and renormalization group approach. Focusing on the strong-repulsion regime, we discuss the effect of an interchain exchange interaction J and interchain repulsion V on the possible ground states of the system and charge order configurations. Since the spin excitations always possess a gap, we find competing bond-order wave and charge density wave phases as possible ground states of the ladder model. We discuss the elementary excitations in these various phases and point an analogy between the excitations on some of these phases and those of a Kondo-Heisenberg insulator. We also study the order of the quantum phase transitions between the different ground states of the system. We obtain second order transitions in the Ising or SU(2)_2 universality class or first order transitions. We map the complete phase diagram in the J-V plane by integrating perturbative renormalization-group equations. Finally, we discuss the effect of doping away from half-filling and the effect of an applied magnetic field.

Affiliated with

Also associated with

No associations

Rating

Charge Density Waves and Bond Order Waves in a quarter filled extended Hubbard ladder 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 Density Waves and Bond Order Waves in a quarter filled extended Hubbard ladder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge Density Waves and Bond Order Waves in a quarter filled extended Hubbard ladder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-381181