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Antiferromagnetic fluctuations in the quasi-two-dimensional organic superconductor detected by Raman spectroscopy
- Source :
- Phys. Rev. B 92, 161112 (2015)
- Publication Year :
- 2015
-
Abstract
- Using Raman scattering, the quasi-two dimensional organic superconductor k-(BEDT-TTF)2Cu[N(CN)2]Br (T_c=11.8 K) and the related antiferromagnet k-(BEDT-TTF)2Cu[N(CN)2]Cl are studied. Raman scattering provides unique spectroscopic information about magnetic degrees of freedom that has been otherwise unavailable on such organic conductors. Below T=200 K a broad band at about 500 cm-1 develops in both compounds. We identify this band with two-magnon excitation. The position and the temperature dependence of the spectral weight are similar in the antiferromagnet and in the metallic Fermi-liquid. We conclude that antiferromagnetic correlations are similarly present in the magnetic insulator and the Fermi-liquid state of the superconductor.
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 92, 161112 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1507.07178
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.92.161112