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Interplay between magnetism and conductivity in the one-dimensional organic conductor TPP[Fe(Pc)(CN)2]2

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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)

Submitter: 稲辺 保

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