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Proximity-Induced Superconductivity in Monolayer MoS2

Tutkimustuotosvertaisarvioitu

Standard

Proximity-Induced Superconductivity in Monolayer MoS2. / Trainer, Daniel J.; Wang, BaoKai; Bobba, Fabrizio; Noah, Samuelson; Xi, XiaoXing; Zasadzinski, John; Nieminen, Jouko; Bansil, Arun; Iavarone, Maria.

julkaisussa: ACS Nano, Vuosikerta 14, Nro 3, 2020, s. 2718-2728.

Tutkimustuotosvertaisarvioitu

Harvard

Trainer, DJ, Wang, B, Bobba, F, Noah, S, Xi, X, Zasadzinski, J, Nieminen, J, Bansil, A & Iavarone, M 2020, 'Proximity-Induced Superconductivity in Monolayer MoS2', ACS Nano, Vuosikerta. 14, Nro 3, Sivut 2718-2728. https://doi.org/10.1021/acsnano.9b07475

APA

Trainer, D. J., Wang, B., Bobba, F., Noah, S., Xi, X., Zasadzinski, J., ... Iavarone, M. (2020). Proximity-Induced Superconductivity in Monolayer MoS2. ACS Nano, 14(3), 2718-2728. https://doi.org/10.1021/acsnano.9b07475

Vancouver

Trainer DJ, Wang B, Bobba F, Noah S, Xi X, Zasadzinski J et al. Proximity-Induced Superconductivity in Monolayer MoS2. ACS Nano. 2020;14(3):2718-2728. https://doi.org/10.1021/acsnano.9b07475

Author

Trainer, Daniel J. ; Wang, BaoKai ; Bobba, Fabrizio ; Noah, Samuelson ; Xi, XiaoXing ; Zasadzinski, John ; Nieminen, Jouko ; Bansil, Arun ; Iavarone, Maria. / Proximity-Induced Superconductivity in Monolayer MoS2. Julkaisussa: ACS Nano. 2020 ; Vuosikerta 14, Nro 3. Sivut 2718-2728.

Bibtex - Lataa

@article{5ea70f6793f9492a81d77ae7e8fd23f3,
title = "Proximity-Induced Superconductivity in Monolayer MoS2",
abstract = "Proximity effects in superconducting normal (SN) material heterostructures with metals and semiconductors have long been observed and theoretically described in terms of Cooper pair wave functions and Andreev reflections. Whereas the semiconducting N-layer materials in the proximity experiments to date have been doped and tens of nanometers thick, we present here a proximity tunneling study involving a pristine single-layer transition-metal dichalcogenide film of MoS2 placed on top of a Pb thin film. Scanning tunneling microscopy and spectroscopy experiments together with parallel theoretical analysis based on electronic structure calculations and Green’s function modeling allow us to unveil a two-step process in which MoS2 first becomes metallic and then is induced into becoming a conventional s-wave Bardeen–Cooper–Schrieffer-type superconductor. The lattice mismatch between the MoS2 overlayer and the Pb substrate is found to give rise to a topographic moir{\'e} pattern. Even though the induced gap appears uniform in location, the coherence peak height of the tunneling spectra is modulated spatially into a moir{\'e} pattern that is similar to but shifted with respect to the moir{\'e} pattern observed in topography. The aforementioned modulation is shown to originate from the atomic-scale structure of the SN interface and the nature of local atomic orbitals that are involved in generating the local pairing potential. Our study indicates that the local modulation of induced superconductivity in MoS2 could be controlled via geometrical tuning, and it thus shows promise toward the integration of monolayer superconductors into next-generation functional electronic devices by exploiting proximity-effect control of quantum phases.",
author = "Trainer, {Daniel J.} and BaoKai Wang and Fabrizio Bobba and Samuelson Noah and XiaoXing Xi and John Zasadzinski and Jouko Nieminen and Arun Bansil and Maria Iavarone",
year = "2020",
doi = "10.1021/acsnano.9b07475",
language = "English",
volume = "14",
pages = "2718--2728",
journal = "ACS Nano",
issn = "1936-0851",
publisher = "AMER CHEMICAL SOC",
number = "3",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Proximity-Induced Superconductivity in Monolayer MoS2

AU - Trainer, Daniel J.

AU - Wang, BaoKai

AU - Bobba, Fabrizio

AU - Noah, Samuelson

AU - Xi, XiaoXing

AU - Zasadzinski, John

AU - Nieminen, Jouko

AU - Bansil, Arun

AU - Iavarone, Maria

PY - 2020

Y1 - 2020

N2 - Proximity effects in superconducting normal (SN) material heterostructures with metals and semiconductors have long been observed and theoretically described in terms of Cooper pair wave functions and Andreev reflections. Whereas the semiconducting N-layer materials in the proximity experiments to date have been doped and tens of nanometers thick, we present here a proximity tunneling study involving a pristine single-layer transition-metal dichalcogenide film of MoS2 placed on top of a Pb thin film. Scanning tunneling microscopy and spectroscopy experiments together with parallel theoretical analysis based on electronic structure calculations and Green’s function modeling allow us to unveil a two-step process in which MoS2 first becomes metallic and then is induced into becoming a conventional s-wave Bardeen–Cooper–Schrieffer-type superconductor. The lattice mismatch between the MoS2 overlayer and the Pb substrate is found to give rise to a topographic moiré pattern. Even though the induced gap appears uniform in location, the coherence peak height of the tunneling spectra is modulated spatially into a moiré pattern that is similar to but shifted with respect to the moiré pattern observed in topography. The aforementioned modulation is shown to originate from the atomic-scale structure of the SN interface and the nature of local atomic orbitals that are involved in generating the local pairing potential. Our study indicates that the local modulation of induced superconductivity in MoS2 could be controlled via geometrical tuning, and it thus shows promise toward the integration of monolayer superconductors into next-generation functional electronic devices by exploiting proximity-effect control of quantum phases.

AB - Proximity effects in superconducting normal (SN) material heterostructures with metals and semiconductors have long been observed and theoretically described in terms of Cooper pair wave functions and Andreev reflections. Whereas the semiconducting N-layer materials in the proximity experiments to date have been doped and tens of nanometers thick, we present here a proximity tunneling study involving a pristine single-layer transition-metal dichalcogenide film of MoS2 placed on top of a Pb thin film. Scanning tunneling microscopy and spectroscopy experiments together with parallel theoretical analysis based on electronic structure calculations and Green’s function modeling allow us to unveil a two-step process in which MoS2 first becomes metallic and then is induced into becoming a conventional s-wave Bardeen–Cooper–Schrieffer-type superconductor. The lattice mismatch between the MoS2 overlayer and the Pb substrate is found to give rise to a topographic moiré pattern. Even though the induced gap appears uniform in location, the coherence peak height of the tunneling spectra is modulated spatially into a moiré pattern that is similar to but shifted with respect to the moiré pattern observed in topography. The aforementioned modulation is shown to originate from the atomic-scale structure of the SN interface and the nature of local atomic orbitals that are involved in generating the local pairing potential. Our study indicates that the local modulation of induced superconductivity in MoS2 could be controlled via geometrical tuning, and it thus shows promise toward the integration of monolayer superconductors into next-generation functional electronic devices by exploiting proximity-effect control of quantum phases.

U2 - 10.1021/acsnano.9b07475

DO - 10.1021/acsnano.9b07475

M3 - Article

VL - 14

SP - 2718

EP - 2728

JO - ACS Nano

JF - ACS Nano

SN - 1936-0851

IS - 3

ER -