First principles simulation on the K_0.8Fe₂Se₂ high-temperature structural superconductor

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• 作者：Rui Guo ; Shizhong Yang ; Ebrahim Khosravi ; Guang-Lin Zhao ; Diola Bagayoko
• 关键词：K0.8Fe2Se2 ; Superconductor ; Simulation
• 刊名：Physica C
• 出版年：2013
• 出版时间：15 October, 2013
• 年：2013
• 卷：493
• 期：Complete
• 页码：55-57
• 全文大小：719 K

文摘

Since the synthesis of the first ones in 2008, iron-based high temperature superconductors have been the subject of many studies. This great interest is partly due to their higher, upper magnetic field, smaller Fermi surface around the ¦£ point, and a larger coherence length. This work is focused on A_xFe₂Se₂ structural superconductor (FeSe, 11 hierarchy; A = K, Cs) as recently observed. ARPES data show novel, electronic structure and a hole-free Fermi surface which is different from previously observed Fermi surface images. We use ab initio density functional theory method to simulate the electronic structure of the novel superconductor A_xFe₂Se₂. We compare this electronic structure with those of other Fe-based superconductors.