Hole density in charge stripes and effect of next-nearest-neighbor transfer
According to various recent experiments for La compounds of high-{Tc} superconductors, some stripe structure seems to be realized in the region of superconductivity. Concerning, for example, inelastic neutron scattering (INS) and 1/8-hole-doping anomaly, analogous (though weak) phenomena have been observed also for Y and Bi systems. Thus, it is of urgent necessity to investigate the interrelationship between the phenomena related to stripes and superconductivity. By applying a variational Monte Carlo method to the two-dimensional t-J model, a couple of properties of striped states are studied. In the charge domain walls vertical (or horizontal) to the lattice (VDW), the hole density {rho}{ell} is favorable in energy similarly for 0.5 {approx{underscore}lt} {rho}{ell} {approx{underscore}lt} 1, whereas in the diagonal domain walls (DDW) the stable hole density is limited to {rho}{ell} = 1. Negative next-nearest-neighbor transfer (t{prime}/t {lt} 0) further stabilizes VDW with {rho}{ell} = 0.5 and DDW with {rho}{ell} = 1 against the d{sub x{sup 2}{minus}y{sup 2}}-wave superconducting state.
- Research Organization:
- Chiba Inst. of Tech., Narashino (JP)
- OSTI ID:
- 20012793
- Journal Information:
- Journal of Low Temperature Physics, Vol. 117, Issue 3-4; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, MOS'99, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Nov 1999; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ordering in the quenched two-dimensional axial next-nearest-neighbor Ising model
Electron-lattice coupling and stripe formation in La{sub 2{minus}x}Ba{sub x}CuO{sub 4}