Material Designs And New Physical Properties In Mx- And Mmx-chain Compounds
by Hiroshi Okamoto /
2012 / English / PDF
7.6 MB Download
This is the first book to comprehensively address the recent
developments in both the experimental and theoretical aspects of
quasi-one-dimensional halogen-bridged mono- (MX) and binuclear
metal (MMX) chain complexes of Pt, Pd and Ni. These complexes
have one-dimensional electronic structures, which cause the
various physical properties as well as electronic structures. In
most MX-chain complexes, the Pt and Pd units are in M(II)-M(IV)
mixed valence or charge density wave (CDW) states due to
electron-phonon interactions, and Ni compounds are in Ni(III)
averaged valence or Mott-Hubbard states due to the on-site
Coulomb repulsion. More recently, Pd(III) Mott-Hubbard (MH)
states have been realized in the ground state by using the
chemical pressure. Pt and Pd chain complexes undergo
photo-induced phase transitions from CDW to MH or metal states,
and Ni chain complexes undergo photo-induced phase transitions
from MH to metal states. Ni chain complexes with strong electron
correlations show tremendous third-order optical nonlinearity and
nonlinear electrical conductivities. They can be explained
theoretically by using the extended Peierls-Hubbard model. For
MMX-chain complexes, averaged valence, CDW, charge polarization,
and alternating charge polarization states have been realized by
using chemical modification and external stimuli, such as
temperature, photo-irradiation, pressure, and water vapor. All of
the electronic structures and phase transitions can be explained
theoretically.
This is the first book to comprehensively address the recent
developments in both the experimental and theoretical aspects of
quasi-one-dimensional halogen-bridged mono- (MX) and binuclear
metal (MMX) chain complexes of Pt, Pd and Ni. These complexes
have one-dimensional electronic structures, which cause the
various physical properties as well as electronic structures. In
most MX-chain complexes, the Pt and Pd units are in M(II)-M(IV)
mixed valence or charge density wave (CDW) states due to
electron-phonon interactions, and Ni compounds are in Ni(III)
averaged valence or Mott-Hubbard states due to the on-site
Coulomb repulsion. More recently, Pd(III) Mott-Hubbard (MH)
states have been realized in the ground state by using the
chemical pressure. Pt and Pd chain complexes undergo
photo-induced phase transitions from CDW to MH or metal states,
and Ni chain complexes undergo photo-induced phase transitions
from MH to metal states. Ni chain complexes with strong electron
correlations show tremendous third-order optical nonlinearity and
nonlinear electrical conductivities. They can be explained
theoretically by using the extended Peierls-Hubbard model. For
MMX-chain complexes, averaged valence, CDW, charge polarization,
and alternating charge polarization states have been realized by
using chemical modification and external stimuli, such as
temperature, photo-irradiation, pressure, and water vapor. All of
the electronic structures and phase transitions can be explained
theoretically.
