Stripes on a 6-Leg Hubbard Ladder

Abstract

While density matrix renormalization group calculations find stripes on doped $n$-leg $t\mathrm{\text{−}}J$ ladders, little is known about the possible formation of stripes on $n$-leg Hubbard ladders. Here we report results for a $7\times 6$ Hubbard model with four holes. We find that a stripe forms for values of $U/t$ ranging from 6 to 20. For $U/t\sim 3–4$, the system exhibits the domain wall feature of a stripe, but the hole density is very broadened.