Transport Properties of Doped t-J Ladders

Abstract

Conductivity and Hall coefficient for various types of t-J ladders are calculated as a function of temperature and frequency by numerical diagonalization. A crossover from an incoherent to a coherent charge dynamics is found at a temperature T_{coh}. There exists another crossover at T_{PG} below which a pseudogap opens in the optical spectra, induced by the opening of a spin gap. In the absence of the spin gap, T_{coh} and the coherent weight are suppressed especially with increasing dimensionality. On the contrary, T_{coh} is strongly enhanced by the pseudogap formation below T_{PG}, where the coherent Drude weight decreases with increasing dimensionality. The Hall coefficient shows a strong crossover at T_{PG} below which it has large amplitude for small doping concentration.

4 pages, RevTeX, 5 PostScript figures

References in corpus (6)

• Evidence for ideal insulating/conducting state in a 1D integrable system
• Pairing and Excitation Spectrum in doped t-J Ladders
• Singlet Stripe Phases in the planar t-J Model
• Charge Dynamics in the Planar t-J Model
• Universal Charge and Spin Response in Optimally Doped Antiferromagnets
• Optical Conductivity of a t--J Ladder

Cited by in corpus (5)

• Numerical Linked-Cluster Algorithms. II. t-J models on the square lattice
• On the electron-energy loss spectra and plasmon resonance in cuprates
• Reactive Hall constant of Strongly Correlated Electrons
• Temperature Dependence of Hall Response in Doped Antiferromagnets
• On the universal optical conductivity and single-particle relaxation in cuprates