Lee, Chih YuanChih YuanLeeNormand, B.B.NormandYING-JER KAO2019-07-302019-07-302018-12-1124699950https://scholars.lib.ntu.edu.tw/handle/123456789/4156089 pages, 9 figures, to appear in Phys. Rev. B© 2018 American Physical Society. A preponderance of evidence suggests that the ground state of the nearest-neighbor S=1/2 antiferromagnetic Heisenberg model on the kagome lattice is a gapless spin liquid. Many candidate materials for the realization of this model possess in addition a Dzyaloshinskii-Moriya (DM) interaction. We study this system by tensor-network methods and deduce that a weak but finite DM interaction is required to destabilize the gapless spin-liquid state. The critical magnitude, Dc/J≃0.012(2), lies well below the DM strength proposed in the kagome material herbertsmithite, indicating a need to reassess the apparent spin-liquid behavior reported in this system.Physics - Strongly Correlated Electrons; Physics - Strongly Correlated Electrons10.1103/PhysRevB.98.2244142-s2.0-85058322761WOS:000452987300004https://api.elsevier.com/content/abstract/scopus_id/85058322761