Network coherence and imperfect superfluidity in the quantum Hall bilayer

H. A. Fertig; Ganpathy Murthy

doi:10.1016/j.ssc.2006.05.050

Network coherence and imperfect superfluidity in the quantum Hall bilayer

H. A. Fertig, Ganpathy Murthy

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

3 Scopus citations

Abstract

Recently, superfluid-like properties have been observed in bilayer quantum Hall systems, in which the effective bosonic particles are understood to be electron-hole pairs. While experimental results are highly suggestive of superfluidity, the linear response of this system remains dissipative down to the lowest available temperatures. We demonstrate that these results may be understood in terms of a unique disorder-dominated state, in which the system organizes into a coherence network, with large incoherent regions separated by quasi-one-dimensional coherent strips with vortices and antivortices at their edges. We demonstrate that this novel state supports nearly dissipationless response at non-vanishing temperatures which can explain a number of puzzling experimental results.

Original language	English
Pages (from-to)	83-87
Number of pages	5
Journal	Solid State Communications
Volume	140
Issue number	2
DOIs	https://doi.org/10.1016/j.ssc.2006.05.050
State	Published - Oct 2006

Bibliographical note

Funding Information:
The authors would like to thank S. Das Sarma, J.P. Eisenstein, M. Shayegan, and E. Tutuc for useful discussions in the course of this research. This work was supported by the NSF via Grant Nos. DMR0454699 (HAF) and DMR0311761 (GM).

Funding

The authors would like to thank S. Das Sarma, J.P. Eisenstein, M. Shayegan, and E. Tutuc for useful discussions in the course of this research. This work was supported by the NSF via Grant Nos. DMR0454699 (HAF) and DMR0311761 (GM).

Funders	Funder number
National Science Foundation (NSF)

Keywords

D. Bilayers, vortices, superfluidity
D. Quantum Hall effect

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2006.05.050

Cite this

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abstract = "Recently, superfluid-like properties have been observed in bilayer quantum Hall systems, in which the effective bosonic particles are understood to be electron-hole pairs. While experimental results are highly suggestive of superfluidity, the linear response of this system remains dissipative down to the lowest available temperatures. We demonstrate that these results may be understood in terms of a unique disorder-dominated state, in which the system organizes into a coherence network, with large incoherent regions separated by quasi-one-dimensional coherent strips with vortices and antivortices at their edges. We demonstrate that this novel state supports nearly dissipationless response at non-vanishing temperatures which can explain a number of puzzling experimental results.",

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AU - Murthy, Ganpathy

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N2 - Recently, superfluid-like properties have been observed in bilayer quantum Hall systems, in which the effective bosonic particles are understood to be electron-hole pairs. While experimental results are highly suggestive of superfluidity, the linear response of this system remains dissipative down to the lowest available temperatures. We demonstrate that these results may be understood in terms of a unique disorder-dominated state, in which the system organizes into a coherence network, with large incoherent regions separated by quasi-one-dimensional coherent strips with vortices and antivortices at their edges. We demonstrate that this novel state supports nearly dissipationless response at non-vanishing temperatures which can explain a number of puzzling experimental results.

AB - Recently, superfluid-like properties have been observed in bilayer quantum Hall systems, in which the effective bosonic particles are understood to be electron-hole pairs. While experimental results are highly suggestive of superfluidity, the linear response of this system remains dissipative down to the lowest available temperatures. We demonstrate that these results may be understood in terms of a unique disorder-dominated state, in which the system organizes into a coherence network, with large incoherent regions separated by quasi-one-dimensional coherent strips with vortices and antivortices at their edges. We demonstrate that this novel state supports nearly dissipationless response at non-vanishing temperatures which can explain a number of puzzling experimental results.

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Network coherence and imperfect superfluidity in the quantum Hall bilayer

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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