Origin of permanent electric dipole moments in wurtzite nanocrystals

被引：77

作者：

Nann, T ^{[1
]}

Schneider, J ^{[1
]}

机构：

[1] Univ Freiburg, Freiburg Mat Res Ctr, FMF, D-79104 Freiburg, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 384卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2003.12.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A simple model is presented which explains the origin and magnitude of large permanent electric dipole moments recently observed for CdSe nanorods. It is based on the small crystallographic deviations of the CdSe lattice from the ideal wurtzite structure. The permanent electric dipole moment is found to scale with the volume of the nanocrystal, as observed experimentally. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：150 / 152

页数：3

共 12 条

[1] ATOMIC DISPLACEMENT, ANHARMONIC THERMAL VIBRATION, EXPANSIVITY AND PYROELECTRIC COEFFICIENT THERMAL DEPENDENCES IN ZNO
ALBERTSSON, J
ABRAHAMS, SC
KVICK, A
[J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1989, 45 : 34 - 40
[2] [Anonymous], 1973, THEORY ELECT POLARIZ
[3] Benoit H., 1951, ANN PHYS-PARIS, V12, p561 609
[4] Spontaneous polarization and piezoelectric constants of III-V nitrides
Bernardini, F
Fiorentini, V
Vanderbilt, D
[J]. PHYSICAL REVIEW B, 1997, 56 (16): : 10024 - 10027
[5] Dielectric dispersion measurements of CdSe nanocrystal colloids: Observation of a permanent dipole moment
Blanton, SA
Leheny, RL
Hines, MA
GuyotSionnest, P
[J]. PHYSICAL REVIEW LETTERS, 1997, 79 (05) : 865 - 868
[6] Effects of macroscopic polarization in III-V nitride multiple quantum wells
Fiorentini, V
Bernardini, F
Della Sala, F
Di Carlo, A
Lugli, P
[J]. PHYSICAL REVIEW B, 1999, 60 (12): : 8849 - 8858
[7] APPLICATION OF RANDOM-ELEMENT ISODISPLACEMENT MODEL TO LONG-WAVELENGTH OPTICAL PHONONS IN CDSECHITE1-CHIMIXED CRYSTALS
GORSKA, M
NAZAREWICZ, W
[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 1974, 65 (01): : 193 - 202
[8] Charge, polarizability, and photoionization of single semiconductor nanocrystals
Krauss, TD
Brus, LE
[J]. PHYSICAL REVIEW LETTERS, 1999, 83 (23) : 4840 - 4843
[9] Origin and scaling of the permanent dipole moment in CdSe nanorods
Li, LS
Alivisatos, AP
[J]. PHYSICAL REVIEW LETTERS, 2003, 90 (09) : 4
[10] Polar CdSe nanocrystals: Implications for electronic structure
Schmidt, ME
Blanton, SA
Hines, MA
GuyotSionnest, P
[J]. JOURNAL OF CHEMICAL PHYSICS, 1997, 106 (12) : 5254 - 5259

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