Local density of states in zero-dimensional semiconductor structures

被引：39

作者：

Kanisawa, K

Butcher, MJ

Tokura, Y

Yamaguchi, H

Hirayama, Y

机构：

[1] NTT Corp, NTT Basic Res Labs, Kanagawa 2430198, Japan

[2] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[3] JST, CREST, Kawaguchi, Saitama 3310012, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.87.196804

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The local density of states (LDOS) within tetrahedral InAs structures, formed at the surface of InAs/GaAs(111)A, has been characterized using low-temperature scanning tunneling microscopy. The LDOS of the lowest four zero-dimensional (0D) discrete levels have been imaged in structures with a comparable size to the electron wavelength. The LDOS inside the structures is observed to be higher than that of the surrounding area at intervals of the level separation. This feature indicates the singularity of the LDOS close to the 0D resonant levels.

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共 16 条

[1] QUANTUM CORRALS [J].

CROMMIE, MF ;

LUTZ, CP ;

EIGLER, DM ;

HELLER, EJ .

PHYSICA D, 1995, 83 (1-3) :98-108

[2] Imaging the wave-function amplitudes in cleaved semiconductor quantum boxes [J].

Grandidier, B ;

Niquet, YM ;

Legrand, B ;

Nys, JP ;

Priester, C ;

Stiévenard, D ;

Gérard, JM ;

Thierry-Mieg, V .

PHYSICAL REVIEW LETTERS, 2000, 85 (05) :1068-1071

[3] DIRECT OBSERVATION OF STANDING-WAVE FORMATION AT SURFACE STEPS USING SCANNING TUNNELING SPECTROSCOPY [J].

HASEGAWA, Y ;

AVOURIS, P .

PHYSICAL REVIEW LETTERS, 1993, 71 (07) :1071-1074

[4]

HULL D, 1984, INTRO DISLOCATIONS, pCH5

[5]

Kanisawa K, 2001, SPRINGER PROC PHYS, V87, P427

[6] Imaging of friedel oscillation patterns of two-dimensionally accumulated electrons at epitaxially grown InAs(111)A surfaces [J].

Kanisawa, K ;

Butcher, MJ ;

Yamaguchi, H ;

Hirayama, Y .

PHYSICAL REVIEW LETTERS, 2001, 86 (15) :3384-3387

[7] Excitation spectra of circular, few-electron quantum dots [J].

Kouwenhoven, LP ;

Oosterkamp, TH ;

Danoesastro, MWS ;

Eto, M ;

Austing, DG ;

Honda, T ;

Tarucha, S .

SCIENCE, 1997, 278 (5344) :1788-1792

[8] EXACT SOLUTION OF THE SCHRODINGER-EQUATION FOR A PARTICLE IN A TETRAHEDRAL BOX [J].

KRISHNAMURTHY, HR ;

MANI, HS ;

VERMA, HC .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1982, 15 (07) :2131-2137

[9] Local density of states from spectroscopic scanning-tunneling-microscope images: Ag(111) [J].

Li, JT ;

Schneider, WD ;

Berndt, R .

PHYSICAL REVIEW B, 1997, 56 (12) :7656-7659

[10] Electron confinement to nanoscale Ag islands on Ag(111): A quantitative study [J].

Li, JT ;

Schneider, WD ;

Berndt, R ;

Crampin, S .

PHYSICAL REVIEW LETTERS, 1998, 80 (15) :3332-3335