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dc.contributor.authorProbst, Benedikt
dc.contributor.authorVirtanen, Pauli
dc.contributor.authorRecher, Patrik
dc.date.accessioned2022-09-06T11:36:18Z
dc.date.available2022-09-06T11:36:18Z
dc.date.issued2022
dc.identifier.citationProbst, B., Virtanen, P., & Recher, P. (2022). Sub- to super-Poissonian crossover of current noise in helical edge states coupled to a spin impurity in a magnetic field. <i>Physical Review B</i>, <i>106</i>(8), Article 085406. <a href="https://doi.org/10.1103/PhysRevB.106.085406" target="_blank">https://doi.org/10.1103/PhysRevB.106.085406</a>
dc.identifier.otherCONVID_155854199
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/82967
dc.description.abstractEdge states of two-dimensional topological insulators are helical and single-particle backscattering is prohibited by time-reversal symmetry. In this paper, we show that an isotropic exchange coupling of helical edge states (HES) to a spin 1/2 impurity subjected to a magnetic field results in characteristic backscattering current noise (BCN) as a function of bias voltage and tilt angle between the direction of the magnetic field and the quantization axis of the HES. In particular, we find transitions from sub-Poissonian (antibunching) to super-Poissonian (bunching) behavior as a direct consequence of the helicity of the edge state electrons. We use the method of full counting statistics within a master equation approach treating the exchange coupling between the spin-1/2 impurity and the HES perturbatively. We express the BCN via coincidence correlation functions of scattering processes between the HES, which gives a precise interpretation of the Fano factor in terms of bunching and antibunching behavior of electron jump events. We also investigate the effect of electron-electron interactions in the HES in terms of the Tomonaga-Luttinger liquid theory.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherAmerican Physical Society (APS)
dc.relation.ispartofseriesPhysical Review B
dc.rightsIn Copyright
dc.titleSub- to super-Poissonian crossover of current noise in helical edge states coupled to a spin impurity in a magnetic field
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-202209064494
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineNanoscience Centerfi
dc.contributor.oppiaineNanoscience Centeren
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9950
dc.relation.numberinseries8
dc.relation.volume106
dc.type.versionpublishedVersion
dc.rights.copyright©2022 American Physical Society
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber800923
dc.relation.grantnumber800923
dc.relation.grantnumber317118
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/800923/EU//SUPERTED
dc.subject.ysokiinteän olomuodon fysiikka
dc.subject.ysosähkönjohtavuus
dc.subject.ysomagneettikentät
dc.subject.ysospin (kvanttimekaniikka)
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p914
jyx.subject.urihttp://www.yso.fi/onto/yso/p9399
jyx.subject.urihttp://www.yso.fi/onto/yso/p19032
jyx.subject.urihttp://www.yso.fi/onto/yso/p38874
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1103/PhysRevB.106.085406
dc.relation.funderEuropean Commissionen
dc.relation.funderResearch Council of Finlanden
dc.relation.funderEuroopan komissiofi
dc.relation.funderSuomen Akatemiafi
jyx.fundingprogramFET Future and Emerging Technologies, H2020en
jyx.fundingprogramAcademy Project, AoFen
jyx.fundingprogramFET Future and Emerging Technologies, H2020fi
jyx.fundingprogramAkatemiahanke, SAfi
jyx.fundinginformationP.V. acknowledges funding from EU's Horizon 2020 research, from the innovation program under Grant Agreement No. 800923 (SUPERTED) and from Academy of Finland Project No. 317118. P.R. acknowledges financial support by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the framework of Germany's Excellence Strategy–EXC-2123 QuantumFrontiers–390837967.
dc.type.okmA1


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