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S.Kagoshima,M.Higa,R.Kondo,H.Hoshino,T.Mori,H.Mori 한국물리학회 2004 Current Applied Physics Vol.4 No.5
Using the uniaxial strain method, the lattice parameters and the atomic positions of the quasi-two-dimensional organic con-ductor θ-(BEDT-TTF)2CsZn(SCN)4 were measured at room temperature with piston pressures up to 10 kbar applied parallel to thec-axis in the conducting plane. The lattice parameterc was predominantlyreduced with increasing the piston pressure although asmall Poisson’s eect occurred in the parametera. Band calculation showed that the transfer integrals under the uniaxial com-pression bythe piston pressure of 10 kbar became similar to those ofh-(BEDT-TTF)2 RbZn(SCN)4. This result is consistent withthat of transport measurements reported alreadyand suggests that a charge disproportionation, which has been observed in theRbZn-compound, occurs also in the present compound under the uniaxial compressive strain.
Structural control of organic conductors by uniaxial strain: θ- and α-phases of BEDT-TTF compounds
R. Kondo,S. Kagoshima,M. Chusho,H. Hoshino,T. Mori,H. Mori,S. Tanaka 한국물리학회 2002 Current Applied Physics Vol.2 No.6
The crystalline and electronic structures of thea-phase BEDT-TTF organic superconductors were controlled by the uniaxiala-axiswhile thec-axis compression reduced the bandwidth. Similar controls were possible also in theh-phase compounds. Thea-axiscompression made the material metallic although thec-axis one insulating. It is possible to systematically explain these changes inelectronic properties under the uniaxial compression in terms of the changes in the electronic band structure in the conducting layer.. 2002 Elsevier Science B.V. All rights reserved.