Semimetallic SDW State in Quasi One-Dimensional Conductors
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概要
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A quasi one-dimensional Hubbard model embodying features of (TMTSF),PF.etc. was studied. The SDW gap equation derived by a variational method is solved.The gap paramerer is derived at OK and at finite temperatures as a function ofthe transverse electron transfer energy t'. The SDW transition proves to be ofthe second order. The upper and lower bands separated by the SDW gap startto overlap due to finite value of t' when the gap becomes smaller than the magni-tude of modulation of band extrema. The temperature dividing the SDW phaseinto semiconducting and semimetallic phases is also obtained. Physical pro-perties such as state density, magnetoresistivity, conductivity, susceptibility etc.are briefly described. Experimental observations agree qualitatively well withthe above results, if we take t' - 30OA. and assume appropriate pressure depend-ence of t'.
- 社団法人日本物理学会の論文
- 1982-09-15
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