Low energy dynamics of two-dimensional lateral tunnel junctions

P. Jiang; I. Yang; W. Kang; L. N. Pfeiffer; K. W. Baldwin; K. W. West

doi:10.1016/j.physe.2006.03.111

Low energy dynamics of two-dimensional lateral tunnel junctions

P. Jiang^*, I. Yang, W. Kang, L. N. Pfeiffer, K. W. Baldwin, K. W. West

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the low temperature tunneling characteristics of two-dimensional lateral tunnel junctions (2DLTJs) consisting of two coplanar two-dimensional electron systems separated by an in-plane tunnel barrier. The tunneling conductance of the 2DLTJ exhibits a characteristic dip at small voltages-consistent with the phenomenon of zero-bias anomaly in low-dimensional tunnel junctions-and a broad conductance peak at the Coulombic energy scale. The conductance peak remains robust under magnetic fields well into the quantum Hall regime. We identify the broad conductance maxima as the signature of the pseudogap in the tunneling density of states below the characteristic Coulomb interaction energy of the 2DLTJ.

Original language	English
Pages (from-to)	203-205
Number of pages	3
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2006.03.111
Publication status	Published - 2006 Aug
Externally published	Yes

Keywords

2D electrons
Coulomb interaction
Tunneling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/j.physe.2006.03.111

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title = "Low energy dynamics of two-dimensional lateral tunnel junctions",

abstract = "We report on the low temperature tunneling characteristics of two-dimensional lateral tunnel junctions (2DLTJs) consisting of two coplanar two-dimensional electron systems separated by an in-plane tunnel barrier. The tunneling conductance of the 2DLTJ exhibits a characteristic dip at small voltages-consistent with the phenomenon of zero-bias anomaly in low-dimensional tunnel junctions-and a broad conductance peak at the Coulombic energy scale. The conductance peak remains robust under magnetic fields well into the quantum Hall regime. We identify the broad conductance maxima as the signature of the pseudogap in the tunneling density of states below the characteristic Coulomb interaction energy of the 2DLTJ.",

keywords = "2D electrons, Coulomb interaction, Tunneling",

author = "P. Jiang and I. Yang and W. Kang and Pfeiffer, {L. N.} and Baldwin, {K. W.} and West, {K. W.}",

year = "2006",

month = aug,

doi = "10.1016/j.physe.2006.03.111",

language = "English",

volume = "34",

pages = "203--205",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Low energy dynamics of two-dimensional lateral tunnel junctions

AU - Jiang, P.

AU - Yang, I.

AU - Kang, W.

AU - Pfeiffer, L. N.

AU - Baldwin, K. W.

AU - West, K. W.

PY - 2006/8

Y1 - 2006/8

N2 - We report on the low temperature tunneling characteristics of two-dimensional lateral tunnel junctions (2DLTJs) consisting of two coplanar two-dimensional electron systems separated by an in-plane tunnel barrier. The tunneling conductance of the 2DLTJ exhibits a characteristic dip at small voltages-consistent with the phenomenon of zero-bias anomaly in low-dimensional tunnel junctions-and a broad conductance peak at the Coulombic energy scale. The conductance peak remains robust under magnetic fields well into the quantum Hall regime. We identify the broad conductance maxima as the signature of the pseudogap in the tunneling density of states below the characteristic Coulomb interaction energy of the 2DLTJ.

AB - We report on the low temperature tunneling characteristics of two-dimensional lateral tunnel junctions (2DLTJs) consisting of two coplanar two-dimensional electron systems separated by an in-plane tunnel barrier. The tunneling conductance of the 2DLTJ exhibits a characteristic dip at small voltages-consistent with the phenomenon of zero-bias anomaly in low-dimensional tunnel junctions-and a broad conductance peak at the Coulombic energy scale. The conductance peak remains robust under magnetic fields well into the quantum Hall regime. We identify the broad conductance maxima as the signature of the pseudogap in the tunneling density of states below the characteristic Coulomb interaction energy of the 2DLTJ.

KW - 2D electrons

KW - Coulomb interaction

KW - Tunneling

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DO - 10.1016/j.physe.2006.03.111

M3 - Article

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VL - 34

SP - 203

EP - 205

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-2

ER -

Low energy dynamics of two-dimensional lateral tunnel junctions

Abstract

Keywords

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