β -type BDA-TTP [BDA-TTP=2,5 -bis(1,3-dithian-2-ylidene)-1,3,4,6- tetrathiapentalene] salts possess high transition temperatures TC reaching 7 K among organic superconductors. TC of β- (BDA-TTP) 2 X (X= SbF6, AsF6) is studied by resistive measurements under uniaxial compression. TC once increases and takes a maximum under compression parallel to the donor stack while it decreases under compression perpendicular to the donor stack. These results are in agreement with the half-filled Hubbard model on the triangular lattice in which the compression controls the spin fluctuation and frustration in the weak pressure region.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Nov 14 2008|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics