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ELECTRON AND HOLE POLARON ASYMMETRY IN A 2-BAND PEIERLS-HUBBARD MATERIAL

被引：45
作者：
GAMMEL, JT
DONOHOE, RJ
BISHOP, AR
SWANSON, BI
机构：
[1] UNIV CALIF LOS ALAMOS SCI LAB,DIV THEORET,LOS ALAMOS,NM 87545
[2] UNIV CALIF LOS ALAMOS SCI LAB,CTR MAT SCI,LOS ALAMOS,NM 87545
[3] UNIV CALIF LOS ALAMOS SCI LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545
来源：
PHYSICAL REVIEW B | 1990年 / 42卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.42.10566
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A combined experimental and theoretical analysis of the quasi-one-dimensional mixed-valence insulator [Pt(en)2][Pt(en)2Cl2] (ClO4)4 (en=N2C2H8) is given. Three intragap absorptions, observed directly by near- and mid-infrared single-crystal transmission experiments and indirectly by resonance-Raman excitation profiles, can be quantitatively accounted for with an extended Peierls-Hubbard chain model incorporating 3/4-filling of two bands, with striking asymmetry between electron and hole polarons. Analogies are drawn to modeling other strong-correlation novel materials, including oxide superconductors. © 1990 The American Physical Society.
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页码：10566 / 10569
页数：4
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