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Dr. Yoshihiro
ASAI
Group Leader
Research Institute
for Computational Sciences (RICS),
National Institute of
Advanced Industrial Science and Technology (AIST)
Research interests and recent topics
1. Molecular electronics (transport
properties of single molecular and atomic bridge junctions, inelastic
scattering effects)
2. Strongly correlated electron systems
3. Organic and oxides conductors and
superconductors.
4. Electronic structure theory and
calculations.
Research background
Condensed matter physics, chemical physics and quantum
chemistry
Partial list of publications
Theories for
molecular electronics
- Y.
Asai, “Nonequilibrium phonon effects on transport properties through
atomic and molecular bridge junctions”, Phys. Rev. B78, 045434 (2008).
- T.
Shimazaki and Y. Asai, “Theoretical study of the lineshape of inelastic
electron tunneling spectroscopy”, Phys. Rev. B77, 115428 (2008).
- T.
Shimazaki and Y. Asai, “Bias voltage dependence on the vibronic electric
current”, Phys. Rev. B77, 075110 (2008).
- Y.
Asai and H. Fukuyama, “Theory of length-dependent conductance in one-dimensional
chains”, Phys. Rev. B72, 085431 (2005).
- Y.
Asai, “Theory of Inelastic Electric Current through Single Molecules”,
Phys. Rev. Lett. 93, 246102 (2004); Phys.
Rev. Lett., 94, 099901(2005).
- T.
Shimazaki, Y. Asai and K. Yamashita, “Theoretical Rate Constants of
Super-Exchange Hole Transfer and Thermally Induced Hopping in DNA”, J.
Phys. Chem. B 109, 1295 (2005).
- Y.
Asai, “Theory of Electric Conductance of DNA Molecule”, J. Phys. Chem. B
107, 4647 (2003).
Strongly
correlated electron systems
·
Y. Asai, “Adaptive
sampling approach to the negative-sign problem in the auxiliary field quantum
monte carlo method”, Phys. Rev. B62, 10674 (2000).
·
Y. Asai and H. Katagiri, “Coupled-cluster
approach to electron correlations in the two-dimensional Hubbard model”, Phys.
Rev. B60, R13946 (1999).
·
Y. Asai, “Superconducting,
magnetic and charge correlations in the doped two-chain Hubbard model”, Phys.
Rev. B52, 10390 (1995).
·
Y. Asai,
“Reduced-density-matrix analysis of superconducting correlation in the two
dimensional and the two-chain Hubbard models”, Phys. Rev. B50, R6519 (1995).
Organic
superconductors
- Y.
Asai, “Symmetry of superconductivity in NH3K3C60
superconductors: nonadiabatic effects in multiband systems”, Phys. Rev.
B68, 014513 (2003).
- Y. Asai, “Jahn-Teller
mechanism of the half width of the intramolecular vibration spectrum in
doped C60: Coupling with Hg, T1u, and Hu
modes”, Phys. Rev. B49, 4289 (1994).
- Y. Asai and Y.
Kawaguchi, “Adiabatic and nonadiabatic electron-intramolecular-vibration
couplings and superconductivity in fullerenes”, Phys. Rev. B46, R1265
(1992).
Electronic structure
·
Y. Asai, S. Hirata and K.
Yamashita, “Local Electronic Excitation Mechanism for Nanofabrication of
Polydiacetylene Molecular Wire”, J. Phys. Soc. Jpn, 72, 3286 (2003).
·
T. Kawamoto, Y. Asai, and S.
Abe, “Novel mechanism of photoinduced reversible phase transitions in
molecule-based magnets”, Phys. Rev. Lett. 86, 348 (2001).
Review
- Y. Asai and T. Shimazaki, “Vibronic Mechanisms for Charge Transport
and Migration through DNA and Single Molecules”, An invited chapter
contribution in “Charge Migration in DNA, -Perspectives from Physics,
Chemistry and Biology-“, Edited by T. Chakraborty,
Springer Nanoscience and Technology Series
(Springer, Berlin, 2007).
- Y. Asai, “A Remedy
for the Negative Sign Problem in the Auxiliary Field Quantum Monte Carlo
Method”, in Recent Advances in Quantum Monte Carlo
Methods II. Eds. S. Rothstein and W.A. Lester (World Scientific, 2003,
Singapore).
Full publication list
Research
project finished
JST-CREST
project on “Contact Effects and Transport Properties of Single Molecules”
Organized
workshop in past
CRERST workshop on physics
of single molecules; Transport properties of single molecules, atomic wires and
DNA
Research activity of theory
group in FY2003 (in Japanese)
Activity
report 2005 #1,
#2
Activity
report 2004 #1,
#2, #3
Contact
information:
Dr. Yoshihiro ASAI
Research Institute for Computational
Sciences (RICS)
National
Institute of Advanced Industrial Science and Technology (AIST)
Umezono 1-1-1, Tsukuba, Ibaraki 305-8568
Japan