IrTe2的阴离子解聚转变
Anionic depolymerization transition in IrTe2
摘要：
硒（Se）的掺杂使二碲化铱（IrTe $_{2}$）的反磁性转变温度从278 K提高到560 K。透射电子显微镜实验表明，这种增强是伴随着从$q = 1/5(10\bar{1})$ -到$q = 1/6(10\bar{1})$ -类型的非正弦结构调制的演变。这些全面的结果是一致的概念的不稳定的聚合物的Te-Te键在过渡，其温度增加的化学和流体静压力和取代的Te与更多的电负性硒。IrTe $_{2}$中的这种温度诱导的解聚转变在结晶无机固体中是独特的。
英文摘要：
Selenium (Se) substitution drastically increases the transition temperature of iridium ditelluride (IrTe$_{2}$) to a diamagnetic superstructure from 278 K to 560 K. Transmission electron microscopy experiments revealed that this enhancement is accompanied by the evolution of non-sinusoidal structure modulations from $q = 1/5(10\bar{1})$- to $q = 1/6(10\bar{1})$-types. These comprehensive results are consistent with the concept of the destabilization of polymeric Te-Te bonds at the transition, the temperature of which is increased by chemical and hydrostatic pressure and by the substitution of Te with the more electronegative Se. This temperature-induced depolymerization transition in IrTe$_{2}$ is unique in crystalline inorganic solids.
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