Abstract
In article number 1800057, Keisuke Tomiyasu and co-workers report that Sc substitution in LaCoO3 destabilizes its nonmagnetic low-spin state and generates an anomalous paramagnetic state accompanied by the enhancement of transport gap and magneto-lattice-expansion as well as the contraction of Co–O distance with the increase of electron site-transfer. These phenomena are not well described by the mixture of conventional low- and high-spin states, but by their quantum superposition occurring on the verge of a spin-state transition. This study enables the accelerated design of new advanced materials without requiring special equipment based on the concept of quantum spin-state criticality.
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