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Interplay between magnetism and conductivity in the one-dimensional organic conductor TPP[Fe(Pc)(CN)2]2
| Title: | Interplay between magnetism and conductivity in the one-dimensional organic conductor TPP[Fe(Pc)(CN)2]2 |
| Authors: | Kimata, M. Browse this author | | Takahide, Y. Browse this author | | Harada, A. Browse this author | | Satsukawa, H. Browse this author | | Hazama, K. Browse this author | | Terashima, T. Browse this author | | Uji, S. Browse this author | | Naito, T. Browse this author →KAKEN DB | | Inabe, T. Browse this author |
| Keywords: | colossal magnetoresistance | | electrical conductivity | | energy gap | | iron compounds | | magnetic materials | | magnetic moments | | magnetoresistance | | organic compounds |
| Issue Date: | Aug-2009 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 80 |
| Issue: | 8 |
| Start Page: | 085110 |
| Publisher DOI: | 10.1103/PhysRevB.80.085110 |
| Abstract: | The strongly nonlinear current-voltage (I-V) characteristics and the large negative magnetoresistance (MR) are observed at low temperatures in the one-dimensional organic conductor TPP[Fe(Pc)(CN)2]2. The nonlinear I-V curves are interpreted as the transport of the electrons and holes excited from the charge ordered state on the Fe(Pc)(CN)2 chains, whose energy gap strongly depends on electric fields. The negative MR is enhanced as temperature decreases, and the resistance steeply changes over four orders of magnitude around 15 T at 1.5 K. This decrease is associated with a magnetic torque anomaly, and the energy gap is rapidly reduced around 15 T. The detailed analyses of the I-V curves show that the electric flux distribution, i.e., the dimensionality of the Coulomb interaction between the carriers, also changes around 15 T. |
| Rights: | ©2009 The American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/39403 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 稲辺 保
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