Negative Delta-T Noise in the Fractional Quantum Hall Effect
| Autor: | B. Grémaud, Thibaut Jonckheere, Jérôme Rech, Thomas Martin |
|---|---|
| Přispěvatelé: | Centre de Physique Théorique - UMR 7332 (CPT), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), CPT - E6 Nanophysique, Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Strongly Correlated Electrons (cond-mat.str-el) Quantum point contact Shot noise General Physics and Astronomy FOS: Physical sciences Quantum Hall effect Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Fractional quantum Hall effect Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Quasiparticle 010306 general physics Noise (radio) Quantum tunnelling [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall] Sign (mathematics) |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2020, 125 (8), pp.086801. ⟨10.1103/PhysRevLett.125.086801⟩ Physical Review Letters, 2020, 125 (8), pp.086801. ⟨10.1103/PhysRevLett.125.086801⟩ |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/PhysRevLett.125.086801⟩ |
| Popis: | We study the current correlations of fractional quantum Hall edges at the output of a quantum point contact (QPC) subjected to a temperature gradient. This out-of-equilibrium situation gives rise to a form of temperature-activated shot noise, dubbed delta-$T$ noise. We show that the tunneling of Laughlin quasiparticles leads to a negative delta-$T$ noise, in stark contrast with electron tunneling. Moreover, varying the transmission of the QPC or applying a voltage bias across the Hall bar may flip the sign of this noise contribution, yielding signatures which can be accessed experimentally. Comment: 6+8 pages, 3 figures |
| Databáze: | OpenAIRE |
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