Universal Behavior of Quantum Spin Liquid and Optical Conductivity in the Insulator Herbertsmithite.Published in:Journal of Low Temperature Physics, 2018, v. 191, n. 1/2, p. 4, doi. 10.1007/s10909-017-1821-zBy:Shaginyan, V. R.;Msezane, A. Z.;Stephanovich, V. A.;Popov, K. G.;Japaridze, G. S.Publication type:Article