Author/Authors :
Yasuzuka، نويسنده , , S. and Terakura، نويسنده , , C. and Terashima، نويسنده , , T. and Yakabe، نويسنده , , T. and Terai، نويسنده , , Y. and Yamamoto، نويسنده , , H.M. and Yamaura، نويسنده , , J. and Maeda، نويسنده , , R. and Kato، نويسنده , , R. and Uji، نويسنده , , S.، نويسنده ,
Abstract :
We report the measurements of Shubnikov–de Haas (SdH) oscillation and angular dependent magnetoresistance oscillation (ADMRO) in a new layered organic conductor (BEDT-TTF)3Br(pBIB), where pBIB stands for p-bis(iodoethynyl)benzene. When magnetic fields are applied perpendicular to the layers, two distinct SdH oscillations are clearly observed, which arise from the two extremal cross-sectional areas of the slightly warped cylindrical Fermi surface (FS). The cross-sectional areas correspond to 50.9 and 51.6% of the first Brillouin zone. From the analysis of the ADMRO, the area of FS is estimated to be 52.5% of the first Brillouin zone. The ADMRO data also shows that the anisotropy of the FS is enhanced by change of Br(pBIB) for Cl(DFBIB), where DFBIB stands for 1,4-difluoro-2,5-bis(iodoethynyl)benzene. These results are consistent with the band calculation.
Keywords :
Transport measurements , Magnetoresistance oscillation , Organic conductor , 2D Fermi surface
