Probing the pairing symmetry and pair charge stiffness of doped $t-J$ ladders: a DMRG study

ORAL

Abstract

We perform the numerical equivalent of a phase sensitive experiment on $t-J$ ladders. We apply proximity effect fields with different complex phases at both ends of an open system and we study the transport of Cooper pairs. Measuring the response of the system and the induced Josephson current, Density Matrix Renormalization Group calculations show how, depending on the doping fraction, the rung-leg parity of the pair field changes from minus to plus as the density of holes is increased. We also study the pair charge stiffness.

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Authors

  • Adrian Feiguin

    Microsoft Research, Station Q, Microsoft Q, The University of California at Santa Barbara

  • Steven White

    UCI, University of California Irvine, University of California, Irvine

  • Douglas J. Scalapino

    University of California, Santa Barbara, UCSB, University of California at Santa Barbara