Experimental realization of Lieb-Mattis plateau in a quantum spin chain

H. Yamaguchi, T. Okita, Y. Iwasaki +7

We present a mixed spin-(1/2, 5/2) chain composed of a charge-transfer salt (4-Br-$o$-MePy-V)FeCl${}_4$. We observe the entire magnetization curve up to saturation, which exhibits a…