论文标题
用$μ$ SR探测的中心对称和非中心对称RE-B化合物的完全损失的超导性
Fully gapped superconductivity in centrosymmetric and non-centrosymmetric Re-B compounds probed with $μ$SR
论文作者
论文摘要
我们通过特定的热量，磁敏感性，电阻率，横向和零场MUON自旋旋转/放松/放松（$μ$ $ sr）实验，对Re $ _7 $ b $ _3 $和RE $ _3 $ B的超导性能进行了全面研究。 Re $ _7 $ b $ _3 $（T $ _C $ = 3.2〜K）是一个非中心的类型II（$κ$ $ \ $ \ $ 9.27）超导体（$λ_{e-ph} $ = 0.54）。另一方面，Re $ _3 $ b（t $ _c $ = 5.19〜k）是中心型II（$κ$ \ $ \ $ 34.55）超导体（$λ_{e-ph} $ = 0.64）。我们的横向场$μ$ SR测量结果显示了各向同性间隙BCS类型超导性的证据，其归一化差距（$Δ_0/k_bt_c $）为1.69（RE $ _7 $ _7 $ b $ _3 $）和1.75（RE $ _3 $）（re $ _3 $ b）。
We present a comprehensive study on superconducting properties of Re$_7$B$_3$ and Re$_3$B through specific heat, magnetic susceptibility, resistivity, and transverse and zero-field muon spin rotation/relaxation ($μ$SR) experiments on polycrystalline samples. Re$_7$B$_3$ (T$_C$ = 3.2~K) is a non-centrosymmetric type-II ($κ$ $\approx$ 9.27) superconductor in the weak coupling ($λ_{e-ph}$ = 0.54) regime. On the other hand, Re$_3$B (T$_C$ = 5.19~K) is a centrosymmetric type-II ($κ$ $\approx$ 34.55) superconductor in the moderate coupling ($λ_{e-ph}$ = 0.64) regime. Our transverse-field $μ$SR measurements show evidence for isotropically gapped BCS type superconductivity with normalized gap ($Δ_0/k_BT_C$) values of 1.69 (Re$_7$B$_3$) and 1.75 (Re$_3$B).
