One Hole in the Two-Legt−JLadder and Adiabatic Continuity to the Noninteracting Limit

S. R. White, D. J. Scalapino, S. A. Kivelson
2015 Physical Review Letters  
We have carried out density-matrix-renormalization group (DMRG) calculations for the problem of one doped hole in a two-leg t-J ladder. Recent studies have concluded that exotic "Mott" physics --- arising from the projection onto the space of no double-occupied sites --- is manifest in this model system, leading to charge localization and a new mechanism for charge modulation. In contrast, we show that there is no localization and that the charge density modulation arises when the minimum in
more » ... quasiparticle dispersion moves away from π. Although singular changes in the quasiparticle dispersion do occur as a function of model parameters, all the DMRG results can be qualitatively understood from a non-interacting "band-structure" perspective.
doi:10.1103/physrevlett.115.056401 pmid:26274429 fatcat:gortpbiagbh77ii4s2nkw7qxk4