Strongly interacting two-dimensional electron systems: Evidence for enhanced one-dimensional edge-channel coupling

被引：1

作者：

Marty, C. ^{[1
,2
]}

Reichl, C. ^{[1
,2
]}

Parolo, S. ^{[1
,2
]}

Grandt-Ionita, I. ^{[1
,2
,3
]}

Scharnetzky, J. ^{[1
,2
]}

Dietsche, W. ^{[1
,2
,4
]}

Wegscheider, W. ^{[1
,2
]}

机构：

[1] Swiss Fed Inst Technol, Lab Solid State Phys, CH-8093 Zurich, Switzerland

[2] Swiss Fed Inst Technol, Quantum Ctr, CH-8093 Zurich, Switzerland

[3] Univ Hamburg, Inst Nanostruktur & Festkorperphys, D-22761 Hamburg, Germany

[4] Max Plank Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW B | 2023年 / 108卷 / 23期

基金：

瑞士国家科学基金会;

关键词：

QUANTUM; CROSSOVER; INTEGER;

D O I：

10.1103/PhysRevB.108.235131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We observe nearly vanishing Hall resistances for integer filling factors in a counterflow experiment on a density-balanced two-dimensional (2D) bilayer system. Filling-factor-dependent equilibration lengths demonstrate enhanced 1D coupling via edge channels. Due to the narrow barrier the edge modes of the two 2D electron gases are in close proximity allowing for exciton formation at the sample edges. Electron drag measurements confirm the observed quantum-state-selective coupling between the layers.

引用

页数：5

共 26 条

[1] EXCITON BINDING-ENERGY IN QUANTUM WELLS [J].

BASTARD, G ;

MENDEZ, EE ;

CHANG, LL ;

ESAKI, L .

PHYSICAL REVIEW B, 1982, 26 (04) :1974-1979

[2] Structured back gates for high-mobility two-dimensional electron systems using oxygen ion implantation [J].

Berl, M. ;

Tiemann, L. ;

Dietsche, W. ;

Karl, H. ;

Wegscheider, W. .

APPLIED PHYSICS LETTERS, 2016, 108 (13)

[3] Asymptotic exchange coupling of quasi-one-dimensional excitons in carbon nanotubes [J].

Bondarev, I. V. .

PHYSICAL REVIEW B, 2011, 83 (15)

[4] ABSENCE OF BACKSCATTERING IN THE QUANTUM HALL-EFFECT IN MULTIPROBE CONDUCTORS [J].

BUTTIKER, M .

PHYSICAL REVIEW B, 1988, 38 (14) :9375-9389

[5] Bose-Einstein condensation of excitons in bilayer electron systems [J].

Eisenstein, JP ;

MacDonald, AH .

NATURE, 2004, 432 (7018) :691-694

[6] COULOMB BARRIER TO TUNNELING BETWEEN PARALLEL 2-DIMENSIONAL ELECTRON-SYSTEMS [J].

EISENSTEIN, JP ;

PFEIFFER, LN ;

WEST, KW .

PHYSICAL REVIEW LETTERS, 1992, 69 (26) :3804-3807

[7] NEW TRANSPORT PHENOMENA IN COUPLED QUANTUM-WELLS [J].

EISENSTEIN, JP .

SUPERLATTICES AND MICROSTRUCTURES, 1992, 12 (01) :107-114

[8] Josephson effect without superconductivity: Realization in quantum Hall bilayers [J].

Fogler, MM ;

Wilczek, F .

PHYSICAL REVIEW LETTERS, 2001, 86 (09) :1833-1836

[9] Absorption spectrum around ν=1:: Evidence for a small-size Skyrmion -: art. no. 096802 [J].

Groshaus, JG ;

Umansky, V ;

Shtrikman, H ;

Levinson, Y ;

Bar-Joseph, I .

PHYSICAL REVIEW LETTERS, 2004, 93 (09)

[10] Tunneling between parallel two-dimensional electron liquids [J].

Jungwirth, T ;

MacDonald, AH .

SURFACE SCIENCE, 1996, 361 (1-3) :167-170

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