Netsu Sokutei, 49 (4), p. 146, (2022)

解説

擬一次元ハロゲン架橋金属錯体における相転移及び相分離現象の解明

Investigation of Phase Transition and Phase Separation on Quasi-One-Dimensional Halogen-Bridged Metal Complex

One-dimensional electron systems in condensed matter are an important subject in material science, where charge, lattice, and spin are dominant factors for non-linear physical properties. Here, I introduced the fundamental knowledge of the quasi-one-dimensional halogen-bridged metal (MX) complexes and the charge-density-wave-to-Motto-Hubbard (CDW-to-MH) charge transfer phase transition and its mechanism of the Pd complex with alkyl chain. Then, unique CDW-to-MH charge transfer phase transition and CDW-MH phase separation and its mechanism of the Pd complex with weak in-plane ligand field, where the hydrogen bond network induced the perturbation and propagation of the phase transition and separation. In addition, the CDW-MH phase separation was observed in the macro and nano scale by optical and scanning tunneling microscopies.