Fermi - surface topology and the effects of intrinsic disorder in a class of charge - transfer salts containing magnetic ions : b 9 - „ BEDT - TTF

Robust superconducting state in the low-quasiparticle-density organic metals -„BEDT-TTF...4†„H3O...M„C2O4...3‡ ·Y: Superconductivity due to proximity to a charge-ordered state

We report magnetotransport measurements on the quasi-two-dimensional charge-transfer salts BEDT-TTF 4 H3O M C2O4 3 Y, with Y =C6H5NO2 and C6H5CN using magnetic fields of up to 45 T and temperatures down to 0.5 K. A surprisingly robust superconducting state with an in-plane upper critical field Bc2 33 T, comparable to the highest critical field of any BEDT-TTF superconductor, and critical temper...

Angle-resolved photoemission study on low-dimensional systems

Peculiarity of crystal structures of materials has a great influence on their electronic structures such as Fermi surface topology, which in turn govern various physical properties. Especially, the low dimensionality of the system sometimes causes unusual physical properties. For example, a couple of parallel planar Fermi surfaces gives a strong tendency toward non-metallic states in one dimens...

Oscillatory magnetoresistance in the charge-transfer salt beta "-(BEDT-TTF)2AuBr2 in magnetic fields up to 60 T: Evidence for field-induced Fermi-surface reconstruction.

Anisotropic mobility and carrier dynamics in the β-type BEDT-TTF salts as studied by inter-layer transverse magnetoresistance

A new method to estimate an in-plane conduction anisotropy in a quasi-two-dimensional (q2D) layered conductor by measuring the inter-layer transverse magnetoresistance is proposed. We applied this method to layered organic conductors β-(BEDT-TTF)2X (BEDT-TTF = bis(ethylenedithio)tetrathiafulvalene, C10H8S8; X = IBr2, I2Br) by applying magnetic field rotating within the basal plane at 4.2 K. We ...

Superconducting properties and Fermi-surface topology of the quasi-two-dimensional organic superconductor λ-(BETS)2GaCl4

The Fermi surface topology of the organic superconductor λ(BETS)2GaCl4 has been determined using the Shubnikov-de Haas and magnetic breakdown effects and angle-dependent magnetoresistance oscillations. The former experiments were carried out in pulsed fields of up to 60 T, whereas the latter employed quasistatic fields of up to 30 T. All of these data show that the Fermi-surface topology of λ-(...