Electrical Transports and Stability of Small Polarons of O 2p Holes in LixCo 1 - xO

スポンサーリンク

概要

• 論文の詳細を見る

• In order to disentangle the confused arguments as to whether a band conduction or a hopping conduction dominates the electrical transport in LixCo1-xO, dielectric properties, dc and ac conductivities, and thermopowers were investigated. Positive thermopowers indicated the major carriers of holes. Two dielectric relaxations appeared in the loss tangent, a very weak peak at a low temperature (∼170 K) and a rather strong one at a high temperature (∼240 K). The activation energy required for the high temperature relaxation was nearly equal to that obtained in Arrhenius plots of σ·T and 1/T. The temperature-dependence of ac conductivities corresponded well to that of loss tangent. The results are explained in terms of small polarons of O 2p holes hopping between oxygen sites. The reorientation of holes bound to Li+ ions gives rise to the low temperature relaxation. A theoretical calculation provides a direct evidence for stability of small polarons of O 2p holes in CoO.

• Physical Society of Japanの論文
• 1996-01-15

著者

• Iguchi Eisuke

  Materials Science Department Of Mechanical Engineering And Materials Science Faculty Of Engineering

• HASHIMOTO Takashi

  Materials Science, Department of Mechanical Engineering and Materials Science, Faculty of Engineerin

• Yokoyama Shino

  Materials Science Department Of Mechanical Engineering And Materials Science Faculty Of Engineering

• Hashimoto Takashi

  Materials Science, Department of Mechanical Engineering and Materials Science, Faculty of Engineering, Yokohama National University, Tokiwadai, Hodogaya-Ku, Yokohama 240

• Yokoyama Shino

  Materials Science, Department of Mechanical Engineering and Materials Science, Faculty of Engineering, Yokohama National University, Tokiwadai, Hodogaya-Ku, Yokohama 240

関連論文

• Study of Electronic Structures in LaCo_Ti_xO_3(x = 0, 0.05 and 0.15)Using Discrete-Variational-Xα Cluster Method
• Electrical Transports and Stability of Small Polarons of O 2p Holes in Li_xCo_O
• Hall-Effect Sign Anomaly and Seebeck Effect in Nd_Pb_MnO_3
• Estimates of Anderson's Electron-Phonon Coupling Constants of Small Polarons Localized at Oxygen Ions in Ni_Li_xO Using a Polarizable Point-Ion Shell Model
• Electrical Transports of LaFe_Ti_xO_3(x≤0.10)
• Dielectric Relaxations and Electrical Transport Due to Nonadiabatic Small Polarons in p-Type Nio Doped with Li
• Electrical Transports and Stability of Small Polarons of O 2p Holes in LixCo 1 - xO

スポンサーリンク