Effect of nonmagnetic impurities on stripes in high-Tc cuprates
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We perform the numerically exact diagonalization study of the t-J model with nonmagnetic impurities to clarify the relation between Zn impurities and the stripes. By examining the hole-hole correlation function for a two-hole \sqrt{18}x\sqrt{18} cluster with a single impurity, we find that the impurity has a tendency to stabilize vertical charge stripes. This tendency is caused by the gain of the kinetic energy of holes moving along the stripes that are formed avoiding the impurity.
3 pages including 2 figures. Proceedings for ISS2000 (Tokyo, October 2000). To be published in Physica C
3 pages including 2 figures. Proceedings for ISS2000 (Tokyo, October 2000). To be published in Physica C