Fermiology and superconductivity studies on the non-tetrachalcogenafulvalene structured organic superconductor beta-(BDA-TTP)_2SbF_6

Abstract

The quantum oscillatory effect and superconductivity in a non-tetrachalcogenafulvalene (TCF) structure based organic superconductor beta-(BDA-TTP)_2SbF_6 are studied. Here the Shubnikov-de Haas effect (SdH) and angular dependent magnetoresistance oscillations (AMRO) are observed. The oscillation frequency associated with a cylindrical Fermi surface is found to be about 4050 tesla, which is also verified by the tunnel diode oscillator (TDO) measurement. The upper critical field Hc2 measurement in a tilted magnetic field and the TDO measurement in the mixed state reveal a highly anisotropic superconducting nature in this material. We compared physical properties of beta-(BDA-TTP)_2SbF_6 with typical TCF structure based quasi two-dimensional organic conductors. A notable feature of beta-(BDA-TTP)_2SbF_6 superconductor is a large value of effective cyclotron mass m_c^*=12.4+/1.1 m_e, which is the largest yet found in an organic superconductor. A possible origin of the enhanced effective mass and its relation to the superconductivity are briefly discussed.

8 pages, 10 figures

References in corpus (2)

• High-resolution ac-calorimetry studies of the quasi-2D organic superconductor $\kappa$-(BEDT-TTF)${}_2$Cu(NCS)${}_2$
• Superconducting properties and Fermi-surface topology of the quasi-two-dimensional organic superconductor $\lambda$-(BETS)${}_2$GaCl${}_4$

Cited by in corpus (6)

• Quantum frustration in organic Mott insulators: from spin liquids to unconventional superconductors
• Contact-less measurements of Shubnikov-de Haas oscillations in the magnetically ordered state of CeAgSb${}_2$ and SmAgSb${}_2$ single crystals
• Enhancement of electron correlation due to the molecular dimerization in organic superconductors $\beta$-(BDA-TTP)${}_{2}X$ ($X$=I${}_3$, SbF${}_6$)
• Anisotropic scattering in angular-dependent magnetoresistance oscillations of quasi-2D and quasi-1D metals: beyond the relaxation-time approximation
• Model construction and superconductivity analysis of organic conductors β-(BDA-TTP)_2MF_6 (M=P, As, Sb, Ta) based on first principles band calculation
• Theory of the beta-type Organic Superconductivity under Uniaxial Compression