Quantum liquid of vortices in the quasi-two-dimensional organic superconductor-(BEDT-TTF

T. Sasaki, W. Biberacher, K. Neumaier, W. Hehn, K. Andres

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)


We present magnetic torque measurements on the quasi-two-dimensional organic superconductor (Formula presented)-(BEDT-TTF)(Formula presented) at low temperature (Formula presented). The irreversible field (Formula presented) lies far below the upper critical field (Formula presented) even at (Formula presented) In the magnetic field region, (Formula presented) a vortex liquid state exists even at (Formula presented) resulting from the quantum fluctuations instead of the contribution of the thermal one at higher temperature. This finding is explained as the quantum vortex liquid state driven by the quantum fluctuations from the different theoretical models. In the liquid state, de Haas-van Alphen oscillations are observed, and (Formula presented) is defined by the appearance of the additional damping on the oscillation amplitude.

Original languageEnglish
Pages (from-to)10889-10892
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number17
Publication statusPublished - 1998


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