Topological Quantum Phenomena in Condensed Matter with Broken Symmetries

Home > Members > Kazumasa Miyake

Japanese

Member Profile

Kazumasa Miyake

Kazumasa Miyake

Professor, Graduate School of Engineering Science, Osaka University
Field of Specialty:
Theory of Condensed Matter Physics
Topics of Research:
(B01) Novel Edge Phenomena in Spin-Triplet Superfluids
Specific Topics:
Superfluidity, new development of theory of superconductivity
■ Laboratory Website

RESEARCH

I have engaged in research on mechanisms of unconventional superconductivity. In 1980's I proposed that the pairing interaction in strongly correlated electron systems, such as heavy fermion metals, should be mediated by antiferromagnetic spin fluctuations (AFSP). In this decade, I have been concentrating to clarify roles of critical valence fluctuations, complementary ones to AFSP, for a mechanism of unconventional superconductivity observed in some Ce- and Yb-based heavy fermion compounds. I have also pointed out that the odd-frequency p-wave singlet superconductivity can be stabilized against the d-wave state by exchanging spin waves in coexisting phase of superconductivity and antiferromagnetism. Researches on microscopic mechanism of spin triplet superconductor Sr2RuO4 and its generalized internal Josephson mode are my recent activities.

In this project, I try to contribute to solving a long standing puzzle on intrinsic angular momentum, or intrinsic magnetic moment, from a theoretical point of view.I will also clarify physical properties of the odd-frequency superconducting state that is expected to appear rather ubiquitously in coexistence phase of superconductivity and antiferromagnetism. An aspect of topological physics possibly hidden in the nematic phase of Sr3Ru2O7 will be another subject of mine.

EDUCATION

1971
Bachelor of Engineering, Yokohama National University
1979
Doctor of Science, Nagoya University

PROFESSIONAL EXPERIENCE

1976
Research Fellowship for Young Scientists, Japan Society for the Promotion of Science
1976-1987
Assistant Professor, Faculty of Science, Nagoya University
1987-1991
Associate Professor, College of General Education, Nagoya University
1991-1994
Associate Professor, Faculty of Engineering Science, Osaka University
1994-1997
Professor, Faculty of Engineering Science, Osaka University
1997-Present
Professor, Graduate School of Engineering Science, Osaka University

SELECTION OF PUBLICATIONS

"Impurity Effect on Frequency Dependent Superconductivity: Odd-Frequency Pairing and Even-Frequency Pairing",
Y. Yoshioka, K. Miyake,
J. Phys. Soc. Jpn. 81, 093702 -1-4 (Sep. 2012).

"Pomeranchuk Instability of Spin-Antisymmetric Channel in Sr3Ru2O7",
Y. Yoshioka, K. Miyake,
J. Phys. Soc. Jpn. 81, 023707-1-4 (Feb. 2012).

"On the Puzzle of Odd-Frequency Superconductivity",
H. Kusunose, Y. Fuseya, K. Miyake,
J. Phys. Soc. Jpn. 80, 054702-1-7 (May. 2011).

"Pairing Mechanism and Anisotropy of d-Vector of Spin-Triplet Superconductor Sr2RuO4",
Y. Yoshioka and K. Miyake,
J. Phys. Soc. Jpn. 78, 074701-1-8 (2009).

"Realization of Odd-Frequency p-Wave Spin-Singlet Superconductivity Coexisting with
Antiferromagnetic Order near Quantum Critical Point",
Y. Fuseya, H. Kohno and K. Miyake,
J. Phys. Soc. Jpn. 72, 2914-2923 (2003).

"Enhanced Valence Fluctuation Caused by f-c Coulomb Interaction in Ce-Based Heavy Electrons: Possible Origin of Pressure-Induced Enhancement of Superconducting Temperature in CeCu2Ge2 and Related Compounds",
Y. Onishi and K. Miyake,
J. Phys. Soc. Jpn. 69, 3955-3964 (2000).

" Model for Unconventional Superconductivity of Sr2RuO4: Effect of Impurity Scattering on
Time-Reversal Breaking Triplet Pairing with Tiny Gap",
K. Miyake and O. Narikiyo,
Phys. Rev. Lett. 83, 1423-1426 (1999).

"Spin-Fluctuation Mediated Even-Parity Pairing in Heavy Fermion Superconductors",
K. Miyake, S. Schmitt-Rink, and C. M. Varma,
Phys. Rev. B 34, 6554-6556 (1986).

PAGE TOP