One Hole in the Two-Leg tJ Ladder and Adiabatic Continuity to the Noninteracting Limit

S. R. White, D. J. Scalapino, and S. A. Kivelson
Phys. Rev. Lett. 115, 056401 – Published 28 July 2015
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Abstract

We carry out density-matrix-renormalization group (DMRG) calculations for the problem of one doped hole in a two-leg tJ 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 the quasiparticle dispersion moves away from π. Although singular changes in the quasiparticle dispersion do occur as a function of model parameters, all of the DMRG results can be qualitatively understood from a noninteracting “band-structure” perspective.

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  • Received 17 February 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.056401

© 2015 American Physical Society

Authors & Affiliations

S. R. White, D. J. Scalapino, and S. A. Kivelson

  • Department of Physics, University of California, Irvine, California 92697, USA, Department of Physics, University of California, Santa Barbara, California 93106, USA, and Department of Physics, Stanford University, Stanford, California 94305, USA

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Issue

Vol. 115, Iss. 5 — 31 July 2015

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