Fermi-edge singularity in resonant tunneling

A. K. Geim; P. C. Main; N. La Scala; L. Eaves; T. J. Foster; P. H. Beton; J. W. Sakai; F. W. Sheard; M. Henini; G. Hill; M. A. Pate

Fermi-edge singularity in resonant tunneling

A. K. Geim, P. C. Main, N. La Scala, L. Eaves, T. J. Foster, P. H. Beton, J. W. Sakai, F. W. Sheard, M. Henini, G. Hill, M. A. Pate

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Abstract

We have observed a Fermi-edge singularity in the tunneling current between a two-dimensional electron gas (2DEG) and a zero-dimensional localized state. A sharp peak in the tunnel current is observed when the energy of the localized state matches the Fermi energy of the 2DEG. The peak grows and becomes sharper as the temperature is decreased to our lowest temperature of 70 mK. We attribute the singularity to the Coulomb interaction between the tunneling electron on the localized site and the Fermi sea.

Original language	English
Pages (from-to)	2061-2064
Number of pages	3
Journal	Physical Review Letters
Volume	72
Issue number	13
Publication status	Published - 1994

Keywords

electronic states
impurity states
quantum-well
barrier
si
gaas

Cite this

@article{55a1ab2b6e2c47d49490497b8517c205,

title = "Fermi-edge singularity in resonant tunneling",

abstract = "We have observed a Fermi-edge singularity in the tunneling current between a two-dimensional electron gas (2DEG) and a zero-dimensional localized state. A sharp peak in the tunnel current is observed when the energy of the localized state matches the Fermi energy of the 2DEG. The peak grows and becomes sharper as the temperature is decreased to our lowest temperature of 70 mK. We attribute the singularity to the Coulomb interaction between the tunneling electron on the localized site and the Fermi sea.",

keywords = "electronic states, impurity states, quantum-well, barrier, si, gaas",

author = "Geim, {A. K.} and Main, {P. C.} and {La Scala}, N. and L. Eaves and Foster, {T. J.} and Beton, {P. H.} and Sakai, {J. W.} and Sheard, {F. W.} and M. Henini and G. Hill and Pate, {M. A.}",

note = "Nd600 Times Cited:123 Cited References Count:36",

year = "1994",

language = "English",

volume = "72",

pages = "2061--2064",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "13",

}

TY - JOUR

T1 - Fermi-edge singularity in resonant tunneling

AU - Geim, A. K.

AU - Main, P. C.

AU - La Scala, N.

AU - Eaves, L.

AU - Foster, T. J.

AU - Beton, P. H.

AU - Sakai, J. W.

AU - Sheard, F. W.

AU - Henini, M.

AU - Hill, G.

AU - Pate, M. A.

N1 - Nd600 Times Cited:123 Cited References Count:36

PY - 1994

Y1 - 1994

N2 - We have observed a Fermi-edge singularity in the tunneling current between a two-dimensional electron gas (2DEG) and a zero-dimensional localized state. A sharp peak in the tunnel current is observed when the energy of the localized state matches the Fermi energy of the 2DEG. The peak grows and becomes sharper as the temperature is decreased to our lowest temperature of 70 mK. We attribute the singularity to the Coulomb interaction between the tunneling electron on the localized site and the Fermi sea.

AB - We have observed a Fermi-edge singularity in the tunneling current between a two-dimensional electron gas (2DEG) and a zero-dimensional localized state. A sharp peak in the tunnel current is observed when the energy of the localized state matches the Fermi energy of the 2DEG. The peak grows and becomes sharper as the temperature is decreased to our lowest temperature of 70 mK. We attribute the singularity to the Coulomb interaction between the tunneling electron on the localized site and the Fermi sea.

KW - electronic states

KW - impurity states

KW - quantum-well

KW - barrier

KW - si

KW - gaas

M3 - Article

SN - 0031-9007

VL - 72

SP - 2061

EP - 2064

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

ER -

Fermi-edge singularity in resonant tunneling

Abstract

Keywords

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