Magnetization Process and Collective Excitations in the S=1/2 Triangular-Lattice Heisenberg Antiferromagnet Ba3CoSb2O9

Takuya Susuki, Nobuyuki Kurita, Takuya Tanaka +4

We have performed high-field magnetization and ESR measurements on Ba${}_3$CoSb${}_2$O${}_9$ single crystals, as a representative two-dimensional spin-1/2 Heisenberg antiferromagnet on a…