<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>YbO</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:mi>Cl</mml:mi></mml:mrow></mml:math>: A two-dimensional square-lattice compound with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>J</mml:mi><mml:mtext>eff</mml:mtext></mml:msub><mml:mo>=</mml:mo><mml:mfrac><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:mrow></mml:math> magnetic moments
V. K. Singh, K. Nam, Maneesha Barik, K. Boya, E. Kermarrec, P. Khuntia, Kee Hoon Kim, Sayantika Bhowal, B. Koteswararao
Abstract
P. W. Anderson once proposed a ``resonating valence bond'' ground state of a 2D square lattice, an exotic disordered state formed by spin-pair superposition due to large quantum zero-point motion. However, perfect square-lattice materials realized so far exhibit long-range order with a reduced ordered moment. Here, the authors introduce a new quantum magnet, Bi${}_{2}$YbO${}_{4}$Cl, synthesized by the hydrothermal method. This compound realizes spin-orbit entangled moments in a 2D square lattice and maintains spin disorder down to several millikelvin temperatures.
Topics & Concepts
Ground stateSquare latticePhysicsValence (chemistry)Superposition principleCondensed matter physicsQuantum mechanicsIsing modelAdvanced Condensed Matter PhysicsPhysics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materials