Upper Critical Field of the 3 Kelvin Phase in Sr2RuO4
Upper Critical Field of the 3 Kelvin Phase in Sr2RuO4
复制标题
Sr2RuO4 中 3 开尔文相的上临界场
DOI：
10.1143/jpsj.72.1623
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发表时间：
2003
影响因子：
1.7
通讯作者：
M. Sigrist
中科院分区：
文献类型：
--
作者：
M. Matsumoto;C. Belardinelli;M. Sigrist
非均匀的3Kelvin相很可能是一种超导态，形核在微米级Ru金属夹杂物和超导开始上方的Sr2RuO4之间的界面上。这种丝状超导态产生了上临界场的特征温度依赖关系，它是次线性的，即Hc2(T)∝(T*-T)γ具有0.5≤γ<；1(T*：成核温度)。用Ginzburg-Landau理论分析了场中成核自旋三重态相的行为，并根据有限宽度增强超导电丝存在时的二组分序参数解释了实验中观察到的H2的特征。
The inhomogeneous 3 Kelvin phase is most likely a superconducting state nucleating at the interface between micrometer-sized Ru-metal inclusions and Sr 2 RuO 4 above the bulk onset of superconductivity. This filamentary superconducting state yields a characteristic temperature dependence of the upper critical field which is sublinear, i.e., H c2 ( T ) ∝( T * - T ) γ with 0.5 ≤γ< 1 ( T * : nucleation temperature). The Ginzburg–Landau theory is used to analyze the behavior of the nucleated spin–triplet phase in a field and the characteristic features of H c2 observed in the experiment are explained based on a two-component order parameter in the presence of a filament of enhanced superconductivity with a finite width.