Probing the Kondo density of states in a three-terminal quantum ring

R. Leturcq; L. Schmid; K. Ensslin; Y. Meir; D. C. Driscoll; A. C. Gossard

doi:10.1016/j.physe.2006.03.105

Probing the Kondo density of states in a three-terminal quantum ring

R. Leturcq, L. Schmid, K. Ensslin, Y. Meir, D. C. Driscoll, A. C. Gossard

Department of Physics

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

1 Scopus citations

Abstract

By measuring the Kondo effect in a quantum ring connected to three terminals, we show that it is possible to determine which lead is strongly coupled to the ring and gives rise to a Kondo resonance, and which lead is weakly coupled. In the configuration where the ring is strongly coupled to only two leads, we use the third weakly coupled lead to probe the Kondo density of states (DOS). By applying a bias voltage between the two strongly coupled leads, we show directly the splitting of the out-of-equilibrium Kondo DOS.

Original language	English
Pages (from-to)	441-444
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2006.03.105
State	Published - 1 Aug 2006

Keywords

Electronic density of states
Kondo effect
Semiconductor quantum dots

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.2006.03.105

Cite this

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title = "Probing the Kondo density of states in a three-terminal quantum ring",

abstract = "By measuring the Kondo effect in a quantum ring connected to three terminals, we show that it is possible to determine which lead is strongly coupled to the ring and gives rise to a Kondo resonance, and which lead is weakly coupled. In the configuration where the ring is strongly coupled to only two leads, we use the third weakly coupled lead to probe the Kondo density of states (DOS). By applying a bias voltage between the two strongly coupled leads, we show directly the splitting of the out-of-equilibrium Kondo DOS.",

keywords = "Electronic density of states, Kondo effect, Semiconductor quantum dots",

author = "R. Leturcq and L. Schmid and K. Ensslin and Y. Meir and Driscoll, {D. C.} and Gossard, {A. C.}",

note = "Funding Information: The authors thank T. Ihn, K. Kobayashi, S. De Franceschi, L. P. Kouwenhoven and A. Rosch for useful discussions. Financial support from the Swiss Science Foundation (Schweizerischer Nationalfonds) via NCCR Nanoscience and from the EU Human Potential Program financed via the Bundesministerium f{\"u}r Bildung und Wissenschaft is gratefully acknowledged. YM acknowledges support from the ISF.",

year = "2006",

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doi = "10.1016/j.physe.2006.03.105",

language = "English",

volume = "34",

pages = "441--444",

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T1 - Probing the Kondo density of states in a three-terminal quantum ring

AU - Leturcq, R.

AU - Schmid, L.

AU - Ensslin, K.

AU - Meir, Y.

AU - Driscoll, D. C.

AU - Gossard, A. C.

N1 - Funding Information: The authors thank T. Ihn, K. Kobayashi, S. De Franceschi, L. P. Kouwenhoven and A. Rosch for useful discussions. Financial support from the Swiss Science Foundation (Schweizerischer Nationalfonds) via NCCR Nanoscience and from the EU Human Potential Program financed via the Bundesministerium für Bildung und Wissenschaft is gratefully acknowledged. YM acknowledges support from the ISF.

PY - 2006/8/1

Y1 - 2006/8/1

N2 - By measuring the Kondo effect in a quantum ring connected to three terminals, we show that it is possible to determine which lead is strongly coupled to the ring and gives rise to a Kondo resonance, and which lead is weakly coupled. In the configuration where the ring is strongly coupled to only two leads, we use the third weakly coupled lead to probe the Kondo density of states (DOS). By applying a bias voltage between the two strongly coupled leads, we show directly the splitting of the out-of-equilibrium Kondo DOS.

AB - By measuring the Kondo effect in a quantum ring connected to three terminals, we show that it is possible to determine which lead is strongly coupled to the ring and gives rise to a Kondo resonance, and which lead is weakly coupled. In the configuration where the ring is strongly coupled to only two leads, we use the third weakly coupled lead to probe the Kondo density of states (DOS). By applying a bias voltage between the two strongly coupled leads, we show directly the splitting of the out-of-equilibrium Kondo DOS.

KW - Electronic density of states

KW - Kondo effect

KW - Semiconductor quantum dots

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U2 - 10.1016/j.physe.2006.03.105

DO - 10.1016/j.physe.2006.03.105

M3 - Article

AN - SCOPUS:33746618367

SN - 1386-9477

VL - 34

SP - 441

EP - 444

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-2

ER -

Probing the Kondo density of states in a three-terminal quantum ring

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Keywords

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