Studies of the t-J two-leg ladder via series expansions

Details Studies of the t-J two-leg ladder via series expansions Studies of the t-J two-leg ladder via series expansions

1999-09-19

arxiv.org/abs/cond-mat/9909280v2

Physical Review B60, 16364(1999)

Physics

Condensed Matter

Strongly Correlated Electrons

9 figures, correct the error in Fig.3. to be appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.60.16364

Series expansions at T=0 are used to study properties of the half-filled $t-J$ ladder doped with one or two holes, and at quarter filling. Dispersion curves are obtained for one-hole symmetric and antisymmetric (bonding and antibonding) excitations and for the two-hole bound state. The line in the phase diagram which separates bound and unbound states is determined. For quarter filling we compute the ground state energy and estimate the location of the phase separation line. Comparisons with other numerical and analytical results are presented.

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