Flux-lattice melting in LafeAso1-xFx : First-principles prediction
Flux-lattice melting in LafeAso1-xFx : First-principles prediction
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DOI：
10.1103/physrevb.78.144507
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发表时间：
2008-05
影响因子：
3.7
通讯作者：
Jian-Ping Lv;Qing-Hu Chen
中科院分区：
文献类型：
--
作者：
Jian-Ping Lv;Qing-Hu Chen
本文报道了新型铁基超导体$ la_ {0.9}F_{0.1}FeAs$和$ la_ {0.925}F_{0.075}FeAs$中磁通晶格熔化的理论研究。利用超网络链闭包和一种高效的算法，计算了二维单组分等离子体对分布函数、静态结构因子和不同温度下的直接相关函数。证明了Hansen-Verlet冻结准则对ii型超导体的涡流-液体冻结是有效的。结合密度泛函理论和平均场衬底法，预测了$LaO_{0.9}F_{0.1}FeAs$和$LaO_{0.925}F_{0.075}FeAs$的通量晶格相遇线。
We report the theoretical study of the flux-lattice melting in the novel iron-based superconductor $LaO_{0.9}F_{0.1}FeAs$ and $LaO_{0.925}F_{0.075}FeAs$. Using the Hypernetted-Chain closure and an efficient algorithm, we calculate the two-dimensional one-component plasma pair distribution functions, static structure factors and direct correlation functions at various temperatures. The Hansen-Verlet freezing criterion is shown to be valid for vortex-liquid freezing in type-II superconductors. Flux-lattice meting lines for $LaO_{0.9}F_{0.1}FeAs$ and $LaO_{0.925}F_{0.075}FeAs$ are predicted through the combination of the density functional theory and the mean-field substrate approach.