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 separating pi-shifted antiferromagnetic (AF) domains are found, as in Tranquada's interpretation of neutron experiments. Our main result is that the elementary stripe "building block" resembles the properties of one hole at small J/t, with robust AF correlations across the hole induced by the local tendency 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 insulating parent compound.
Martins
G B
GB
National High Magnetic Field Lab and Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.
Gazza
C
C
Xavier
J C
JC
Feiguin
A
A
Dagotto
E
E