Kazuo Kadowaki
- Affiliation:
-
- MANA Satellite, NIMS
- Kadowaki Group, Institute of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Japan
- Specialty:
- Superconductivity and Nanoelectronics
- Academic degree:
- Ph.D. Osaka University, 1980
- Home Page:
- See Personal Website
Educational & Working History
| 2007-Present | Present Professor, University of Tsukuba |
|---|---|
| 2005 | Associate Professor, University of Tsukuba |
| 2003 | Group Leader, National Research Institute for Metals |
| 2000 | Senior Researcher, National Research Institute for Metals |
| 1989 | Senior Researcher, Natuurkundig Laboratorium der Universitat van Amsterdam and Kammerlingh Onnes Laboratorium, Universitat Leiden |
| 1986 | Universitat Docent, Natuurkundig Laoratoriun der Universitat van Amsterdam |
| 1985 | Research Associate, Department of Physics, University of Alberta, Canada |
| 1982 | Post Doctoral Fellow, Department of Physics, University of Alberta, Canada |
| 1981 | Yukawa fellow (Osaka University) |
| 1980 | JSPS Research fellow |
| 1980 | Ph.D. , Osaka University |
Research History
Kadowaki-Woods law:
In 1985, he discovered a surprising relationship between Sommerfeld constant in metals and the T2 coefficient of electrical resistivity, later known as the Kadowaki-Woods law. This is a universal relationship not only in special metals such as heavy fermion compounds but also in all kinds of metals, as long as they are in the Fermi liquid regime.
Discovery of YBa2Cu3O7-xhigh temperature superconductors:
At the early beginning of the birth of high-Tc superconductors, he discovered YBa2Cu3O7-x independently. It was just a week later than the discovery by Cava et al. Since then, he has been emphasizing necessity of high quality single crystals for the research of high-Tc superconductors.
Josephson plasma:
High-Tc supercondutors such as highly layered compound Bi2Sr2CaCu2O8+x comprise a stack of atomically thin superconducting CuO2 layers in between insulating block layers of Bi2O2. This makes a very unique situation that the superconducting plasma oscillation can be excited in the superconducting main gap, so that superconducting plasma may be so stable without Landau damping working for the plasma wave. He experimentally proved this result for the first time.
THz radiation form intrinsic Josephson junctions of Bi2Sr2CaCu2O8+x
Josephson vortices in intrinsic Josephson junctions in Bi2Sr2CaCu2O8+x can be driven by the c-axis current by the Lorentz force in magnetic field applied within the ab-plane. Because of this motion, Josephson plasma waves can be excited in a junction. This plasma wave is nothing but a composite electromagnetic wave with supercurrents. This is experimentally observed by us for the first time. Furthermore, strong THz radiation, which has a great application potential, is detected recently.
Selected Papers
- C. Renner, B. Revaz, J. Y. Genoud, K. Kadowaki and O. Fischer, 'Pseudogap precursor of the superconducting gap in under- and overdoped Bi2Sr2CaCu2O8+x', Phys. Rev. Lett., 80, (1998) 149-152.
- M. R. Norman, H. Ding, M. Randeria, J. C. Campuzano, T. Yokoya, T. Takeuchi, T. Takahashi, T. Mochiku, K. Kadowaki, P. Guptasarma and D. G. Hinks, 'Destruction of the Fermi surface under doped high-Tc superconductors', Nature, 392, (1998) 157-160.
- C. Renner, B. Revaz, K. Kadowaki, I. Maggio-Aprile and O. Fischer, 'Observation of the Low Temperature Pseudogap in the Vortex Cores of Bi2Sr2CaCu2O8+x', Phys. Rev. Lett., 80, (1998) 3606-3609.
- H. Ding, M. R. Norman, T. Yokoya, T. Takeuchi, M. Randeria, J. C. Campuzano, T. Takahashi, T. Mochiku, K. Kadowaki, 'Evolution of the Fermi Surface with Carrier Concentration in Bi2Sr2CaCu2O8+x', Phys. Rev. Lett., 78, (1997) 2628-2631.
- H. Ding, T. Yokoya, J. C. Campuzano, T. Takahashi, M. Randeria, M. R. Norman, T. Mochiku, K. Kadowaki and J. Giapintzakis, 'Spectroscopic evidence for a pseudogap in the normal state of underdoped high-Tc superconductors', Nature, 382, (1996) 51-54.
- H. Ding, A. F. Ballman, J. C. Campuzano, M. Randeria, M. R. Norman, T. Yokoya, T. Takahashi, H. Katayama-Yoshida, T. Mochiku, K. Kadowaki, G. Jennings, G. P. Brivio, 'Electronic Excitations in Bi2Sr2CaCu2O8+x: Fermi Surface, Dispersion, and Absence of Bilayer Splitting', Phys. Rev. Lett., 76, (1996) 1533-1536.
- Y. Matsuda, B. B. Gaifullin, K. Kumagai, K. Kadowaki and T. Mochiku, 'Collective Josephson Plasma Resonance in the Vortex State of Bi2Sr2CaCu2O8+x', Phys. Rev. Lett., 75, (1995) 4512-4515.
- H. Ding, J. C. Campuzano, A. F. Bellman, T. Yokoya, M. R. Norman, M. Randeria, T. Takahashi, H. Katayama-Yoshida, T. Mochiku, K. Kadowaki, 'Momentum Dependence of the Superconducting Gap in Bi2Sr2CaCu2O8', Phys. Rev. Lett., 74, (1995) 2784-2787.
- P. Aebi, J. Osterwalder, P. Schwaller, L. Schlapbach, M. Shimoda, T. Mochiku and K. Kadowaki, 'Complete Fermi-surface mapping of Bi2Sr2CaCu2O8+x (001) - Coexistence of short-range antiferromagnetic correlations and metallicity in the same phase', Phys. Rev. Lett., 72, (1994) 2757-2760.
- K. Kadowaki and S. B. Woods, 'Universal relationship of the resistivity and specific heat in the heavy fermion compounds', Solid State Commun., 58 (1986) 507-509.