PHOTOINDUCED CHARGE SEPARATION IN Q1D-HETEROJUNCTION MATERIALS - EVIDENCE FOR ELECTRON-HOLE PAIR SEPARATION IN MIXED-HALIDE MX SOLIDS

被引：9

作者：

WORL, LA

HUCKETT, SC

SWANSON, BI

SAXENA, A

BISHOP, AR

GAMMEL, JT

机构：

[1] LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545

[2] LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545

[3] LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 50期

关键词：

D O I：

10.1088/0953-8984/4/50/012

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Resonance Raman experiments on doped and photoexcited single crystals of mixed-halide MX complexes (M = Pt; X = Cl, Br) clearly indicate charge separation: electron polarons preferentially locate on PtBr segments while hole polarons are trapped within PtCl segments. This polaron selectivity, potentially very useful for device applications, is demonstrated theoretically using a discrete, 3/4-filled, two-band, tight-binding, extended Peierls-Hubbard model. Strong hybridization of the PtCl and PtBr electronic bands is the driving force for separation.

引用

页码：10237 / 10244

页数：8

共 17 条

[1] INCOMMENSURATE GROUND-STATES OF A COMMENSURATE PEIERLS-HUBBARD HAMILTONIAN [J].