Optical properties of ZnO:Al epilayers:: Observation of room-temperature many-body absorption-edge singularity -: art. no. 121201

被引：58

作者：

Makino, T ^{[1
]}

Tamura, K

Chia, CH

Segawa, Y

Kawasaki, M

Ohtomo, A

Koinuma, H

机构：

[1] RIKEN, Inst Phys & Chem Res, Photodynam Res Ctr, Sendai, Miyagi 9800845, Japan

[2] Univ Grenoble 1, Spectrometrie Phys Lab, CNRS, UMR 5588, F-38402 St Martin Dheres, France

[3] Tokyo Inst Technol, Dept Innovat & Engineered Mat, Yokohama, Kanagawa 2268502, Japan

[4] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808577, Japan

[5] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[6] Tokyo Inst Technol, Frontier Collaborat Res Ctr, Yokohama, Kanagawa 2268503, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 12期

关键词：

D O I：

10.1103/PhysRevB.65.121201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the evolution of optical absorption spectra in eight samples of n type ZnO:Al as a function of excess electron concentration up to 6.7x10(20) cm(-3) at 300 K. The spectral assignment is examined by taking the many-body effect due to the presence of high-density electron gas into account. We propose that absorption-edge singularity induced by many-body Coulomb effect is observed for the concentration up to 4.8x10(19) cm(-3) at room temperature. Such edge singularity has been so far observed at temperatures less than 50 K in other semiconductors. The strong Coulomb interaction between electrons and holes inherent to ZnO may be related to the persistence of the edge singularity up to room-temperature.

引用

页码：1 / 4

页数：4

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