Size effects on supercooling phenomena in strongly correlated electron systems: IrTe2 and theta-(BEDT-TTF)(2)RbZn(SCN)(4)

Article

关键词: SINGLE-CRYSTAL HOMO6S8;    ORGANIC CONDUCTOR;    SUPERCONDUCTIVITY;    TRANSITION;    METASTABILITY;    TEMPERATURE;    LIQUIDS;    GLASS;    TC2;   

DOI  :  10.1103/PhysRevB.97.085102

来源: SCIE

【 摘 要 】

We report that the sampleminiaturization of first-order-phase-transition bulk systems causes a greater degree of supercooling. From a theoretical perspective, the size effects can be rationalized by considering two mechanisms: (i) the nucleation is a rare and stochastic event, and thus, its rate is correlated with the volume and/or surface area of a given sample; (ii) when the sample size decreases, the dominant heterogeneous nucleation sites that play a primary role for relatively large samples are annealed out. We experimentally verified the size effects on the supercooling phenomena for two different types of strongly correlated electron systems: the transition-metal dichalcogenide IrTe2 and the organic conductor theta-(BEDT-TTF)(2)RbZn(SCN)(4). The origin of the size effects considered in this study does not depend on microscopic details of the material; therefore, they may often be involved in the first-order-transition behavior of small-volume specimens.

【 授权许可】

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