Effect of quenched disorder on the quantum spin liquid state of the triangular-lattice antiferromagnet <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:mi>T</mml:mi><mml:mo>−</mml:mo><mml:msub><mml:mi>TaS</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
H. Murayama, Yuki Sato, Tomoya Taniguchi, Ryosuke Kurihara, Xiangzhuo Xing, Wantong Huang, S. Kasahara, Y. Kasahara, Itamar Kimchi, Makoto Yoshida, Yoshihiro Iwasa, Yuta Mizukami, T. Shibauchi, M. Kończykowski, Yuji Matsuda
Abstract
This paper reports the effect of randomness on a quantum spin liquid state of 1T-TaS${}_{2}$ with a two-dimensional perfect triangular lattice. Systematic measurements of heat capacity and thermal conductivity in pure, Se-substituted, and electron-irradiated crystals reveal the microscopic coexistence of localized orphan spins that form random valence bonds and itinerant spinons that appear to form a Fermi surface.
Topics & Concepts
AntiferromagnetismSpinsSpinonCondensed matter physicsRandomnessHexagonal latticeValence (chemistry)Fermi liquid theoryQuantum spin liquidMaterials sciencePhysicsChemistryElectronQuantum mechanicsMathematicsStatisticsSuperconductivitySpin polarizationAdvanced Condensed Matter PhysicsPhysics of Superconductivity and MagnetismOrganic and Molecular Conductors Research