Minimal model of point contact Andreev reflection spectroscopy of multiband superconductors

被引：6
|
作者：
Romeo, F. [1 ]
Citro, R. [1 ,2 ]
机构：
[1] Univ Salerno, Dipartimento Fis ER Caianiello, I-84084 Fisciano, SA, Italy
[2] CNR SPIN Salerno, I-84084 Fisciano, SA, Italy
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 03期
关键词：
SYMMETRY;
D O I：
10.1103/PhysRevB.91.035427
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We formulate a minimal model of point contact Andreev reflection spectroscopy of a normal-metal/multiband superconductor interface. The theory generalizes the Blonder-Tinkham-Klapwijk formulation to a multiband superconductor and it is based on the quantum waveguide theory. The proposed approach allows an analytic evaluation of the Andreev and normal reflection coefficients and thus is suitable for a data fitting of point contact experiments. The obtained differential conductance curves present distinctive features similar to those measured in the experiments on multiband superconductors, such as iron-based pnictides and MgB2.
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页数：7
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