Doped stripes in models for the cuprates emerging from the one-hole properties of the insulator

The extended and standard t-J models are computationally studied on ladders and planes, with emphasis on the small J/t region. At couplings compatible with photoemission results for undoped cuprates, half-doped stripes separa ting rr-shifted antiferromagnetic (AF) domains are found. as in Tranquada's interpretation of neutron experiments. Our main result is that the element ary stripe "building block" resembles the properties of one hole at small J /t, with robust AF correlations across the hole induced by the local tenden cy of the charge to separate from the spin. This suggests that the seed of half-doped stripes already exists in the unusual properties of the insulati ng parent compound.