Effective Conversion of CDW Sites to SDW States in Pd-Ni Mixed-Metal MX Chains
スポンサーリンク
概要
- 論文の詳細を見る
We theoretic;rlly study the interplay between 21 charge-density-wave (CDW) and spin-density-wave (SOW) in tnixed-rnetal IVIX chains. We asstume that two kinds of tnetals, narnely, Pd and Ni,are randonuly distribtrted in a one-dinaensional chain. Since all-Pd and all-Xi compounds showCDW and SDW, respectively, tlae gradtral rauixing of strch a type gives a very good viewpoint forunderstanditag both the states IIIOUO deeply. Using a Peierls-Htrbbard unodel arrd a mean-fieldapproxitaaation, we find that the CDW state is dr;rstic?rIly sujcpressed by the replacernent of' Pdsites with Ni ones. As a restrlt, the Ni concentration of' 50% is enough to destroy the CDWcornpletely if tlae Htrbbard-G at Ni sites is large enotrgh as expected in rearl materials. Thistaaeans that all the Pd sites become Pd" with no halogen displacements and, 218 a whole, amodified SDW state is formed. Such a pecttli?tr state, which does not exist in pttre MX chains,can explaiua the restrlts of BSR and Ranuan experiraaents.
- 社団法人日本物理学会の論文
- 1999-03-15
著者
-
IWANO Kaoru
Institute for Molecular Science
-
Iwano Kaoru
Institute Of Materials Sturucture Science High Energy Accelerator Research Organization Graduate Uni
関連論文
- Effects of Long-Range Potentials by Impurities in Polyacetylene
- Nonlinear Optical Spectra in Halogen-Bridged Mixed-Valent Platinum Complexes
- Theory for Special Shape of Optical Absorption in Halogen-Bridged Mixed-Valent Metal Complexes
- A New State Realized by Mixing of Ni and Pd as the Metal Ions in MX-Chains : Effects of Electron Correlation and Interpretation of Raman Data
- Optical Studies of Halogen-Bridged Mixed-Valent Metal Complexes : Excitons and Nonlinear Localized Excitations
- Theory for Optical Absorption,Direct and Indirect Excitons in BaBiO_3
- Effective Conversion of CDW Sites to SDW States in Pd-Ni Mixed-Metal MX Chains
- Strong Electron Correlation in the High-Temperature Phase of (EDO-TTF)2PF6 as a Quasi-One-Dimensional Molecular Conductor
- Propagating Librations in Ice XI: Model Analysis and Coherent Inelastic Neutron Scattering Experiment