Magnetic field dependent vibrational modes in isotopically decorated {kappa}-(ET){sub 2}Cu(SCN){sub 2}.
We report the infrared reflectance of several isotopically decorated samples of the 10.4-K organic superconductor {kappa}-(ET){sub 2}Cu(SCN){sub 2} as a function of applied magnetic field at 4.2 K, allowing us to explore changes in intramolecular vibrational modes between the superconducting (low-field) and normal (high-field) states. Comparison with previous variable temperature transport data in which the crystals have similar isotopic decoration patterns suggests that, while the {nu}{sub 3} (Ag), {nu}{sub 60} (B{sub 3g}), and {nu}{sub 21} (B{sub 1g}) are involved in the field-induced normal to superconducting transition below T{sub c}, there is no direct correlation between the value of T{sub c} and the characteristics of these modes. Intramolecular vibrational modes are therefore not driving the superconducting to normal state transition in {kappa}-(ET){sub 2}Cu(SCN){sub 2}. Some plausible mechanisms, which can account for the sensitivity of these intramolecular vibrational modes to the magnetic field, are briefly discussed.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC; NSF; FOR
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 961455
- Report Number(s):
- ANL/MSD/JA-47969
- Journal Information:
- Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: 21 ; 2003 Vol. 68; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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