Recurrent Quantum Scars in a Mesoscopic Graphene Ring

Damien Cabosart, Alexandre Felten, Nicolas Reckinger, Andra Iordanescu, Sébastien Toussaint, Sébastien Faniel, Benoît Hackens

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

When coherent charge carriers cross micron-scale cavities, their dynamics can be governed by a few resonant states, also called “quantum scars”, determined by the cavity geometry. Quantum scars can be described using theoretical tools but have also been directly imaged in the case of high-quality semiconductor cavities as well as in disordered graphene devices, thanks to scanning gate microscopy (SGM). Here, we discuss spatially resolved SGM images of low-temperature charge transport through a mesoscopic ring fabricated from high-quality monolayer graphene lying on top of hexagonal boron nitride. SGM images are decorated with a pattern of radial scars in the ring area, which is found to evolve smoothly and reappear when varying the charge-carrier energy. The energies separating recurrent patterns are found to be directly related to geometric dimensions of the ring. Moreover, a recurrence is also observed in simulations of the local density of states of a model graphene quantum ring. The observed recurrences are discussed in the light of recent predictions of relativistic quantum scars in mesoscopic graphene cavities.

langueAnglais
Pages1344-1349
Nombre de pages6
journalNano Letters
Volume17
Numéro3
Les DOIs
étatPublié - 8 mars 2017

Empreinte digitale

scars
graphene
cavities
rings
Graphite
Microscopic examination
Scanning
Graphene
microscopy
scanning
Charge carriers
charge carriers
energy
Charge transfer
Monolayers
Semiconductor materials
Geometry
Temperature
boron nitride
Graphene devices

mots-clés

    Citer ceci

    Cabosart, D., Felten, A., Reckinger, N., Iordanescu, A., Toussaint, S., Faniel, S., & Hackens, B. (2017). Recurrent Quantum Scars in a Mesoscopic Graphene Ring. Nano Letters, 17(3), 1344-1349. DOI: 10.1021/acs.nanolett.6b03725
    Cabosart, Damien ; Felten, Alexandre ; Reckinger, Nicolas ; Iordanescu, Andra ; Toussaint, Sébastien ; Faniel, Sébastien ; Hackens, Benoît. / Recurrent Quantum Scars in a Mesoscopic Graphene Ring. Dans: Nano Letters. 2017 ; Vol 17, Numéro 3. p. 1344-1349
    @article{10f3c67a721b4f26abcee8aa4d2503c9,
    title = "Recurrent Quantum Scars in a Mesoscopic Graphene Ring",
    abstract = "When coherent charge carriers cross micron-scale cavities, their dynamics can be governed by a few resonant states, also called “quantum scars”, determined by the cavity geometry. Quantum scars can be described using theoretical tools but have also been directly imaged in the case of high-quality semiconductor cavities as well as in disordered graphene devices, thanks to scanning gate microscopy (SGM). Here, we discuss spatially resolved SGM images of low-temperature charge transport through a mesoscopic ring fabricated from high-quality monolayer graphene lying on top of hexagonal boron nitride. SGM images are decorated with a pattern of radial scars in the ring area, which is found to evolve smoothly and reappear when varying the charge-carrier energy. The energies separating recurrent patterns are found to be directly related to geometric dimensions of the ring. Moreover, a recurrence is also observed in simulations of the local density of states of a model graphene quantum ring. The observed recurrences are discussed in the light of recent predictions of relativistic quantum scars in mesoscopic graphene cavities.",
    keywords = "coherent transport, Graphene, mesoscopic transport, quantum scars, relativistic Dirac particles, scanning gate microscopy",
    author = "Damien Cabosart and Alexandre Felten and Nicolas Reckinger and Andra Iordanescu and S\{'e}bastien Toussaint and S\{'e}bastien Faniel and Beno\{^i}t Hackens",
    year = "2017",
    month = "3",
    day = "8",
    doi = "10.1021/acs.nanolett.6b03725",
    language = "English",
    volume = "17",
    pages = "1344--1349",
    journal = "Nano Letters",
    issn = "1530-6984",
    publisher = "American Chemical Society",
    number = "3",

    }

    Cabosart, D, Felten, A, Reckinger, N, Iordanescu, A, Toussaint, S, Faniel, S & Hackens, B 2017, 'Recurrent Quantum Scars in a Mesoscopic Graphene Ring' Nano Letters, VOL 17, Numéro 3, p. 1344-1349. DOI: 10.1021/acs.nanolett.6b03725

    Recurrent Quantum Scars in a Mesoscopic Graphene Ring. / Cabosart, Damien; Felten, Alexandre; Reckinger, Nicolas; Iordanescu, Andra; Toussaint, Sébastien; Faniel, Sébastien; Hackens, Benoît.

    Dans: Nano Letters, Vol 17, Numéro 3, 08.03.2017, p. 1344-1349.

    Résultats de recherche: Contribution à un journal/une revueArticle

    TY - JOUR

    T1 - Recurrent Quantum Scars in a Mesoscopic Graphene Ring

    AU - Cabosart,Damien

    AU - Felten,Alexandre

    AU - Reckinger,Nicolas

    AU - Iordanescu,Andra

    AU - Toussaint,Sébastien

    AU - Faniel,Sébastien

    AU - Hackens,Benoît

    PY - 2017/3/8

    Y1 - 2017/3/8

    N2 - When coherent charge carriers cross micron-scale cavities, their dynamics can be governed by a few resonant states, also called “quantum scars”, determined by the cavity geometry. Quantum scars can be described using theoretical tools but have also been directly imaged in the case of high-quality semiconductor cavities as well as in disordered graphene devices, thanks to scanning gate microscopy (SGM). Here, we discuss spatially resolved SGM images of low-temperature charge transport through a mesoscopic ring fabricated from high-quality monolayer graphene lying on top of hexagonal boron nitride. SGM images are decorated with a pattern of radial scars in the ring area, which is found to evolve smoothly and reappear when varying the charge-carrier energy. The energies separating recurrent patterns are found to be directly related to geometric dimensions of the ring. Moreover, a recurrence is also observed in simulations of the local density of states of a model graphene quantum ring. The observed recurrences are discussed in the light of recent predictions of relativistic quantum scars in mesoscopic graphene cavities.

    AB - When coherent charge carriers cross micron-scale cavities, their dynamics can be governed by a few resonant states, also called “quantum scars”, determined by the cavity geometry. Quantum scars can be described using theoretical tools but have also been directly imaged in the case of high-quality semiconductor cavities as well as in disordered graphene devices, thanks to scanning gate microscopy (SGM). Here, we discuss spatially resolved SGM images of low-temperature charge transport through a mesoscopic ring fabricated from high-quality monolayer graphene lying on top of hexagonal boron nitride. SGM images are decorated with a pattern of radial scars in the ring area, which is found to evolve smoothly and reappear when varying the charge-carrier energy. The energies separating recurrent patterns are found to be directly related to geometric dimensions of the ring. Moreover, a recurrence is also observed in simulations of the local density of states of a model graphene quantum ring. The observed recurrences are discussed in the light of recent predictions of relativistic quantum scars in mesoscopic graphene cavities.

    KW - coherent transport

    KW - Graphene

    KW - mesoscopic transport

    KW - quantum scars

    KW - relativistic Dirac particles

    KW - scanning gate microscopy

    UR - http://www.scopus.com/inward/record.url?scp=85014778286&partnerID=8YFLogxK

    U2 - 10.1021/acs.nanolett.6b03725

    DO - 10.1021/acs.nanolett.6b03725

    M3 - Article

    VL - 17

    SP - 1344

    EP - 1349

    JO - Nano Letters

    T2 - Nano Letters

    JF - Nano Letters

    SN - 1530-6984

    IS - 3

    ER -

    Cabosart D, Felten A, Reckinger N, Iordanescu A, Toussaint S, Faniel S et al. Recurrent Quantum Scars in a Mesoscopic Graphene Ring. Nano Letters. 2017 mars 8;17(3):1344-1349. Disponible �, DOI: 10.1021/acs.nanolett.6b03725