Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer
We present a theory for the regime of coherent interlayer tunneling in a disordered quantum Hall bilayer at total filling factor one, allowing for the effect of static vortices. We find that the system consists of domains of polarized superfluid phase. Injected currents introduce phase slips between...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2011/792125 |
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| author | D. K. K. Lee P. R. Eastham N. R. Cooper |
| author_facet | D. K. K. Lee P. R. Eastham N. R. Cooper |
| author_sort | D. K. K. Lee |
| collection | DOAJ |
| description | We present a theory for the regime of coherent interlayer tunneling in a disordered quantum Hall bilayer at total filling factor one, allowing for the effect of static vortices. We find that the system consists of domains of polarized superfluid phase. Injected currents introduce phase slips between the polarized domains which are pinned by disorder. We present a model of saturated tunneling domains that predicts a critical current for the breakdown of coherent tunneling that is extensive in the system size. This theory is supported by numerical results from a disordered phase model in two dimensions. We also discuss how our picture might be used to interpret experiments in the counterflow geometry and in two-terminal measurements. |
| format | Article |
| id | doaj-art-ab75991181624f42bf239014398cc2cc |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-ab75991181624f42bf239014398cc2cc2025-02-03T06:01:33ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242011-01-01201110.1155/2011/792125792125Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall BilayerD. K. K. Lee0P. R. Eastham1N. R. Cooper2Blackett Laboratory, Imperial College London, London SW7 2AZ, UKSchool of Physics, Trinity College, Dublin 2, IrelandCavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UKWe present a theory for the regime of coherent interlayer tunneling in a disordered quantum Hall bilayer at total filling factor one, allowing for the effect of static vortices. We find that the system consists of domains of polarized superfluid phase. Injected currents introduce phase slips between the polarized domains which are pinned by disorder. We present a model of saturated tunneling domains that predicts a critical current for the breakdown of coherent tunneling that is extensive in the system size. This theory is supported by numerical results from a disordered phase model in two dimensions. We also discuss how our picture might be used to interpret experiments in the counterflow geometry and in two-terminal measurements.http://dx.doi.org/10.1155/2011/792125 |
| spellingShingle | D. K. K. Lee P. R. Eastham N. R. Cooper Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer Advances in Condensed Matter Physics |
| title | Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer |
| title_full | Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer |
| title_fullStr | Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer |
| title_full_unstemmed | Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer |
| title_short | Breakdown of Counterflow Superfluidity in a Disordered Quantum Hall Bilayer |
| title_sort | breakdown of counterflow superfluidity in a disordered quantum hall bilayer |
| url | http://dx.doi.org/10.1155/2011/792125 |
| work_keys_str_mv | AT dkklee breakdownofcounterflowsuperfluidityinadisorderedquantumhallbilayer AT preastham breakdownofcounterflowsuperfluidityinadisorderedquantumhallbilayer AT nrcooper breakdownofcounterflowsuperfluidityinadisorderedquantumhallbilayer |