Impurities in weakly coupled quantum spin chains Sr${}_2$CuO${}_3$ and SrCuO${}_2$

Koushik Karmakar, Rabindranath Bag, Markos Skoulatos +2

We study the effect of non-magnetic Zn${}^{2+}$ (spin-$0$) and magnetic Ni${}^{2+}$ (spin-$1$) impurities on the ground state and low-lying excitations of the quasi-one-dimensional spi…