"T. Susuki,N. Kurita,T. Tanaka,H. Nojiri,A. Matsuo,K. Kindo,H. Tanaka","Magnetization Process and Collective Excitations in the S=1/2 Triangular-Lattice Heisenberg Antiferromagnet Ba<sub>3</sub>CoSb<sub>2</sub>O<sub>9</sub>",,"Phys. Rev. Lett.",,"  110",,"  267201 (1-5)",2013,June