Evidence of superfluidity in double layer 2D electron systems

J. P. Eisenstein; I. B. Spielman; M. Kellogg; L. N. Pfeiffer; K. W. West

doi:10.1016/S1386-9477(02)01034-2

Evidence of superfluidity in double layer 2D electron systems

J. P. Eisenstein, I. B. Spielman, M. Kellogg, L. N. Pfeiffer, K. W. West

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

When two parallel two-dimensional electron gases are sufficiently close together, interlayer Coulomb interactions are of comparable importance to intralayer ones. If the total number of electrons in the bilayer system equals the number of states in the lowest spin-resolved Landau level produced by a large perpendicular magnetic field, an exotic many-body state develops. This state exhibits a variety of remarkable properties including Josephson-like interlayer tunneling and precise quantization of the frictional drag between the layers. These findings lend strong support to the notion that this quantum coherent state is an example of a new kind of superfluid, one in which the underlying bosons are excitons comprised of electrons in one layer bound to holes in the other.

Original language	English (US)
Pages (from-to)	103-106
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	18
Issue number	1-3
DOIs	https://doi.org/10.1016/S1386-9477(02)01034-2
State	Published - May 2003
Externally published	Yes
Event	23rd International Conference on Low Temperature Physics - Hiroshima, Japan Duration: Aug 20 2002 → Aug 27 2002

All Science Journal Classification (ASJC) codes

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

Keywords

Coulomb drag
Excitonic superfluidity
Josephson effect
Two-dimensional electron systems

Access to Document

10.1016/S1386-9477(02)01034-2

Cite this

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title = "Evidence of superfluidity in double layer 2D electron systems",

abstract = "When two parallel two-dimensional electron gases are sufficiently close together, interlayer Coulomb interactions are of comparable importance to intralayer ones. If the total number of electrons in the bilayer system equals the number of states in the lowest spin-resolved Landau level produced by a large perpendicular magnetic field, an exotic many-body state develops. This state exhibits a variety of remarkable properties including Josephson-like interlayer tunneling and precise quantization of the frictional drag between the layers. These findings lend strong support to the notion that this quantum coherent state is an example of a new kind of superfluid, one in which the underlying bosons are excitons comprised of electrons in one layer bound to holes in the other.",

keywords = "Coulomb drag, Excitonic superfluidity, Josephson effect, Two-dimensional electron systems",

author = "Eisenstein, {J. P.} and Spielman, {I. B.} and M. Kellogg and Pfeiffer, {L. N.} and West, {K. W.}",

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doi = "10.1016/S1386-9477(02)01034-2",

language = "English (US)",

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pages = "103--106",

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

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publisher = "Elsevier B.V.",

number = "1-3",

note = "23rd International Conference on Low Temperature Physics ; Conference date: 20-08-2002 Through 27-08-2002",

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TY - JOUR

T1 - Evidence of superfluidity in double layer 2D electron systems

AU - Eisenstein, J. P.

AU - Spielman, I. B.

AU - Kellogg, M.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2003/5

Y1 - 2003/5

N2 - When two parallel two-dimensional electron gases are sufficiently close together, interlayer Coulomb interactions are of comparable importance to intralayer ones. If the total number of electrons in the bilayer system equals the number of states in the lowest spin-resolved Landau level produced by a large perpendicular magnetic field, an exotic many-body state develops. This state exhibits a variety of remarkable properties including Josephson-like interlayer tunneling and precise quantization of the frictional drag between the layers. These findings lend strong support to the notion that this quantum coherent state is an example of a new kind of superfluid, one in which the underlying bosons are excitons comprised of electrons in one layer bound to holes in the other.

AB - When two parallel two-dimensional electron gases are sufficiently close together, interlayer Coulomb interactions are of comparable importance to intralayer ones. If the total number of electrons in the bilayer system equals the number of states in the lowest spin-resolved Landau level produced by a large perpendicular magnetic field, an exotic many-body state develops. This state exhibits a variety of remarkable properties including Josephson-like interlayer tunneling and precise quantization of the frictional drag between the layers. These findings lend strong support to the notion that this quantum coherent state is an example of a new kind of superfluid, one in which the underlying bosons are excitons comprised of electrons in one layer bound to holes in the other.

KW - Coulomb drag

KW - Excitonic superfluidity

KW - Josephson effect

KW - Two-dimensional electron systems

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U2 - 10.1016/S1386-9477(02)01034-2

DO - 10.1016/S1386-9477(02)01034-2

M3 - Conference article

AN - SCOPUS:0037504582

SN - 1386-9477

VL - 18

SP - 103

EP - 106

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1-3

T2 - 23rd International Conference on Low Temperature Physics

Y2 - 20 August 2002 through 27 August 2002

ER -

Evidence of superfluidity in double layer 2D electron systems

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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