Probing the pairing symmetry of the iron pnictides with electronic Raman scattering

被引：26
作者：
Boyd, G. R. [1 ]
Devereaux, T. P. [2 ,3 ]
Hirschfeld, P. J. [1 ]
Mishra, V. [1 ]
Scalapino, D. J. [4 ]
机构：
[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[2] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[3] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA
[4] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 17期
关键词：
Brillouin zones; Fermi surface; high-temperature superconductors; iron compounds; Raman spectra; superconducting energy gap; NODELESS SUPERCONDUCTING GAPS; BA0.6K0.4FE2AS2;
D O I：
10.1103/PhysRevB.79.174521
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An important issue in the study of the iron-arsenic-based superconductors is the symmetry of the superconducting gap, a problem complicated by multiple gaps on different Fermi-surface sheets. Electronic Raman scattering is a flexible bulk probe which allows one in principle to determine gap magnitudes and test for gap nodes in different regions of the Brillouin zone by employing different photon polarization states. Here we calculate the clean Raman intensity for A(1g), B-1g, and B-2g polarizations and discuss the peak structures and low-energy power laws which might be expected for several popular models of the superconducting gap in these systems.
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页数：8
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