Near-field spectroscopy of a gated electron gas: A direct evidence for electron localization

被引：102

作者：

Eytan, G ^{[1
]}

Yayon, Y ^{[1
]}

Rappaport, M ^{[1
]}

Shtrikman, H ^{[1
]}

Bar-Joseph, I ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.81.1666

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The near-field photoluminescence of a gated two-dimensional electron gas is measured. Mie use the negatively charged exciton, formed by binding an electron to a photoexcited electron-hole pair, as an indicator fur the local presence of charge. Large spatial fluctuations in the luminescence intensity of the negatively charged exciton are observed. These fluctuations are shown to be due to electrons localized in the random potential of the remote ionized donors. We use these fluctuations to image the electron and the donor distribution in the plane. [S0031-9007(98)06953-1].

引用

页码：1666 / 1669

页数：4

共 16 条

[1] NEAR-FIELD OPTICS - MICROSCOPY, SPECTROSCOPY, AND SURFACE MODIFICATION BEYOND THE DIFFRACTION LIMIT [J].

BETZIG, E ;

TRAUTMAN, JK .

SCIENCE, 1992, 257 (5067) :189-195

[2] DENSITY OF STATES OF 2D ELECTRON-GAS AND WIDTH OF THE PLATEAU OF IQHE [J].

EFROS, AL .

SOLID STATE COMMUNICATIONS, 1988, 65 (11) :1281-1284

[3]

EYTAN G, UNPUB

[4] OPTICAL SPECTROSCOPY OF A 2-DIMENSIONAL ELECTRON-GAS NEAR THE METAL-INSULATOR-TRANSITION [J].

FINKELSTEIN, G ;

SHTRIKMAN, H ;

BARJOSEPH, I .

PHYSICAL REVIEW LETTERS, 1995, 74 (06) :976-979

[5]

Harris TD, 1996, APPL PHYS LETT, V68, P988, DOI 10.1063/1.116121

[6] NEAR-FIELD SPECTROSCOPY OF THE QUANTUM CONSTITUENTS OF A LUMINESCENT SYSTEM [J].

HESS, HF ;

BETZIG, E ;

HARRIS, TD ;

PFEIFFER, LN ;

WEST, KW .

SCIENCE, 1994, 264 (5166) :1740-1745

[7] THRESHOLD TRANSPORT OF HIGH-MOBILITY TWO-DIMENSIONAL ELECTRON-GAS IN GAAS/ALGAAS HETEROSTRUCTURES [J].

JIANG, C ;

TSUI, DC ;

WEIMANN, G .

APPLIED PHYSICS LETTERS, 1988, 53 (16) :1533-1535

[8] PIEZOELECTRIC TIP-SAMPLE DISTANCE CONTROL FOR NEAR-FIELD OPTICAL MICROSCOPES [J].

KARRAI, K ;

GROBER, RD .

APPLIED PHYSICS LETTERS, 1995, 66 (14) :1842-1844

[9] OBSERVATION OF NEGATIVELY CHARGED EXCITONS X- IN SEMICONDUCTOR QUANTUM-WELLS [J].

KHENG, K ;

COX, RT ;

DAUBIGNE, YM ;

BASSANI, F ;

SAMINADAYAR, K ;

TATARENKO, S .

PHYSICAL REVIEW LETTERS, 1993, 71 (11) :1752-1755

[10] Electric field scaling at a B=0 metal-insulator transition in two dimensions [J].

Kravchenko, SV ;

Simonian, D ;

Sarachik, MP ;

Mason, W ;

Furneaux, JE .

PHYSICAL REVIEW LETTERS, 1996, 77 (24) :4938-4941

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