Field-induced successive transitions were observed in magnetoresistance in the quasi-one-dimensional organic conductor, HMTSF-TCNQ, hexamethylene- tetraselena-fulvalene-tetracyanoquinodimethane. The magnetoresistance exhibits kink transitions accompanying hysteresis at pressures around 1 GPa, but neither at p=0 nor at 2 GPa. At p=0 and below 30 K, this material undergoes charge density wave (CDW) state, which is suppressed around 1 GPa, where successive transitions are observed. Since these behavior is only observed at the boundary in pressure between insulator and metal, and the nature of the insulating state is CDW at p=0, it is strongly suggested that the successive transitions observed in magnetoresistance might be associated with CDW, accordingly a field-induced CDW by the one-dimensionalization by strong magnetic field ranging from 10 to 30 T. The behaviors are compared with previously claimed FICDW and the established FISDW (field-induced-spin-density-wave).
Bibliographical noteFunding Information:
This presentation was partially supported by the Grant-in-Aid for priority area 23110722 . We also appreciate warm the support by the CNRS in France and Ambassade de France au Japon for our participation against the difficult budget due to Japan disaster in March 11, 2011. Work done in part at the NHMFL, supported by NSF-DMR - 0654118 , the State of Florida, and the DOE, and by NSF-DMR - 1005293 (JSB).
- E d charge density wave
- Organic conductor