Construction of microscopic theory of new quantum critical phenomena in strongly-correlated electron systems

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05177
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: Watanabe Shinji 九州工業大学, 大学院工学研究院, 准教授 (40334346)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 量子臨界現象 / 量子輸送現象 / 周期アンダーソン模型 / ホール効果 / SCR理論 / 熱膨張係数 / グリュナイゼンパラメータ / 比熱

Outline of Final Research Achievements

Exact formulas of diagonal conductivity and Hall conductivity are derived from the Kubo formula in hybridized two-orbital systems with arbitrary band dispersions. On the basis of the theoretical framework for the Fermi liquid based on these formulas, quantum transport phenomena in the periodic Anderson model are clarified. The theoretical framework of the magneto volume effect near the magnetic quantum critical point is constructed. On the basis of the self-consistent renormalization theory of spin fluctuations, the specific heat, the thermal-expansion coefficient, and Gruneisen parameter are formulated.

Free Research Field

物性理論、強相関電子系