Imaging diffraction-limited electronic collimation from a non-equilibrium one-dimensional ballistic constriction

被引：37

作者：

Crook, R ^{[1
]}

Smith, CG ^{[1
]}

Barnes, CHW ^{[1
]}

Simmons, MY ^{[1
]}

Ritchie, DA ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Dept Phys, Cambridge CB3 OHE, England

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2000年 / 12卷 / 08期

关键词：

D O I：

10.1088/0953-8984/12/8/102

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on the use of a low-temperature scanning probe microscope to investigate non-equilibrium electronic transport through a one-dimensional ballistic constriction. Trans-conductance images of electrons backscattered in the adjoining two-dimensional reservoirs show a weak acceptance cone consistent with semiclassical collimation. The images also show a strong highly collimated beam of quasi-particles injected into each reservoir with a divergence consistent with quantum mechanical diffraction. In the lower-chemical-potential reservoir these quasi-particles are interpreted as hot electrons while in the higher-chemical-potential reservoir they are interpreted as conduction-band holes.

引用

页码：L167 / L172

页数：6

共 18 条

[1] MAGNETOTRANSPORT AND NONADDITIVITY OF POINT-CONTACT RESISTANCES IN SERIES [J].

BEENAKKER, CWJ ;

VANHOUTEN, H .

PHYSICAL REVIEW B, 1989, 39 (14) :10445-10448

[2] On dynamic properties of a two-dimensional degenerate electron gas [J].

Buhmann, H ;

Molenkamp, LW ;

Gurzhi, RN ;

Kalinenko, AN ;

Kopeliovich, AI ;

Yanovsky, AV .

LOW TEMPERATURE PHYSICS, 1998, 24 (10) :737-741

[3] Imaging electron and conduction-band-hole trajectories through one and two series constrictions [J].

Crook, R ;

Smith, CG ;

Barnes, CHW ;

Simmons, MY ;

Ritchie, DA .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2000, 6 (1-4) :234-237

[4]

CROOK R, 1999, P 24 INT C PHYS SEM, P190

[5] ANOMALOUS MAGNETORESISTANCE AT A MESOSCOPIC BEND [J].

CUMMING, DRS ;

AHMED, H ;

THORNTON, TJ .

APPLIED PHYSICS LETTERS, 1992, 60 (22) :2755-2757

[6] Cryogenic scanning probe characterization of semiconductor nanostructures [J].

Eriksson, MA ;

Beck, RG ;

Topinka, M ;

Katine, JA ;

Westervelt, RM ;

Campman, KL ;

Gossard, AC .

APPLIED PHYSICS LETTERS, 1996, 69 (05) :671-673

[7]

KELLY MJ, 1995, LOW DIMENSIONAL SEMI

[8] SPATIAL VARIATION OF CURRENTS AND FIELDS DUE TO LOCALIZED SCATTERERS IN METALLIC CONDUCTION [J].

LANDAUER, R .

IBM JOURNAL OF RESEARCH AND DEVELOPMENT, 1957, 1 (03) :223-231

[9] NONLINEAR CONDUCTANCE OF A SADDLE-POINT CONSTRICTION [J].

MARTINMORENO, L ;

NICHOLLS, JT ;

PATEL, NK ;

PEPPER, M .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1992, 4 (05) :1323-1333

[10] ELECTRON ELECTRON-SCATTERING PROBED BY A COLLIMATED ELECTRON-BEAM [J].

MOLENKAMP, LW ;

BRUGMANS, MJP ;

VANHOUTEN, H ;

FOXON, CT .

SEMICONDUCTOR SCIENCE AND TECHNOLOGY, 1992, 7 (3B) :B228-B230

← 1 2 →