期刊
PHYSICAL REVIEW B
卷 79, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.174521
关键词
Brillouin zones; Fermi surface; high-temperature superconductors; iron compounds; Raman spectra; superconducting energy gap
资金
- DOE [DE-FG02-05ER46236, DE-AC0276SF00515]
- Stanford Institute
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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