Observations of nascent superfluidity in a bilayer two-dimensional electron system at νT = 1

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

doi:10.1016/j.physe.2006.02.011

Observations of nascent superfluidity in a bilayer two-dimensional electron system at ν_T = 1

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

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

Abstract

Single-layer longitudinal and Hall resistances have been measured in a bilayer two-dimensional electron system at ν_T = 1 with equal but oppositely directed currents flowing in the two layers. At small effective layer separation and low temperature, the bilayer system enters an interlayer coherent state expected to exhibit superfluid properties. We detect this nascent superfluidity through the vanishing of both resistances as the temperature is reduced. This corresponds to the counterflow conductivity rising rapidly as the temperature falls, reaching σ_xx^CF = 580 (e² / h) by T = 35 mK. This supports the prediction that the ground state of this system is an excitonic superfluid.

Original language	English (US)
Pages (from-to)	6-10
Number of pages	5
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	34
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physe.2006.02.011
State	Published - Aug 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

Keywords

Bilayer 2DES
Excitonic superfluidity
Quantum Hall effect

Access to Document

10.1016/j.physe.2006.02.011

Cite this

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title = "Observations of nascent superfluidity in a bilayer two-dimensional electron system at νT = 1",

abstract = "Single-layer longitudinal and Hall resistances have been measured in a bilayer two-dimensional electron system at νT = 1 with equal but oppositely directed currents flowing in the two layers. At small effective layer separation and low temperature, the bilayer system enters an interlayer coherent state expected to exhibit superfluid properties. We detect this nascent superfluidity through the vanishing of both resistances as the temperature is reduced. This corresponds to the counterflow conductivity rising rapidly as the temperature falls, reaching σxxCF = 580 (e2 / h) by T = 35 mK. This supports the prediction that the ground state of this system is an excitonic superfluid.",

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T1 - Observations of nascent superfluidity in a bilayer two-dimensional electron system at νT = 1

AU - Kellogg, M.

AU - Eisenstein, J. P.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 2006/8

Y1 - 2006/8

N2 - Single-layer longitudinal and Hall resistances have been measured in a bilayer two-dimensional electron system at νT = 1 with equal but oppositely directed currents flowing in the two layers. At small effective layer separation and low temperature, the bilayer system enters an interlayer coherent state expected to exhibit superfluid properties. We detect this nascent superfluidity through the vanishing of both resistances as the temperature is reduced. This corresponds to the counterflow conductivity rising rapidly as the temperature falls, reaching σxxCF = 580 (e2 / h) by T = 35 mK. This supports the prediction that the ground state of this system is an excitonic superfluid.

AB - Single-layer longitudinal and Hall resistances have been measured in a bilayer two-dimensional electron system at νT = 1 with equal but oppositely directed currents flowing in the two layers. At small effective layer separation and low temperature, the bilayer system enters an interlayer coherent state expected to exhibit superfluid properties. We detect this nascent superfluidity through the vanishing of both resistances as the temperature is reduced. This corresponds to the counterflow conductivity rising rapidly as the temperature falls, reaching σxxCF = 580 (e2 / h) by T = 35 mK. This supports the prediction that the ground state of this system is an excitonic superfluid.

KW - Bilayer 2DES

KW - Excitonic superfluidity

KW - Quantum Hall effect

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