Superconductivity in BaIrSi2: A 5d electron system with a noncentrosymmetric crystal structure
Superconductivity in BaIrSi2: A 5d electron system with a noncentrosymmetric crystal structure
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BaIrSi2 中的超导性：具有非中心对称晶体结构的 5d 电子系统
DOI：
10.1103/physrevb.99.054514
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发表时间：
2019
影响因子：
3.7
通讯作者：
and Eiji Takayama-Muromachi
中科院分区：
文献类型：
--
作者：
Masaaki Isobe;Koji Kimoto;Masao Arai;and Eiji Takayama-Muromachi
在6 GPa的高压下成功合成了该化合物。具有非中心对称空间群和晶格参数的正交对称结晶。在一个临界温度以下和一个具有金兹堡-朗道参数的上临界场显示超导性。比热测量表明，它是一种具有中等电子-声子耦合常数的中耦合超导体。索默菲常数是。声子调解似乎是主要的库珀配对。最初的计算表明，四个费米表面被自旋轨道耦合分裂。库珀对似乎发生在没有自旋简并的电子之间。
The compoundwas successfully synthesized under high pressure at 6 GPa.crystalizes in an orthorhombic symmetry with the noncentrosymmetric space groupand the lattice parameters, and.shows superconductivity below a critical temperatureand an upper critical fieldwith a Ginzburg-Landau parameter. Specific-heat measurements suggest thatis an intermediate-coupling superconductor with a moderate electron-phonon coupling constant. The Sommerfeld constant is. Phonon mediation seems to be dominant for Cooper pairing in. Theab initiocalculations revealed thathas four Fermi surfaces split by spin-orbit coupling. The Cooper pairing seems to occur between electrons without spin degeneracy.