From Cooper pair splitting to nonlocal spectroscopy of a Shiba state

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From Cooper pair splitting to nonlocal spectroscopy of a Shiba state. / Scherubl, Zoltan; Fulop, Gergo; Gramich, Jorg; Palyi, Andras; Schonenberger, Christian; Nygard, Jesper; Csonka, Szabolcs.

I: Physical Review Research, Bind 4, Nr. 2, 023143, 24.05.2022.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Scherubl, Z, Fulop, G, Gramich, J, Palyi, A, Schonenberger, C, Nygard, J & Csonka, S 2022, 'From Cooper pair splitting to nonlocal spectroscopy of a Shiba state', Physical Review Research, bind 4, nr. 2, 023143. https://doi.org/10.1103/PhysRevResearch.4.023143

APA

Scherubl, Z., Fulop, G., Gramich, J., Palyi, A., Schonenberger, C., Nygard, J., & Csonka, S. (2022). From Cooper pair splitting to nonlocal spectroscopy of a Shiba state. Physical Review Research, 4(2), [023143]. https://doi.org/10.1103/PhysRevResearch.4.023143

Vancouver

Scherubl Z, Fulop G, Gramich J, Palyi A, Schonenberger C, Nygard J o.a. From Cooper pair splitting to nonlocal spectroscopy of a Shiba state. Physical Review Research. 2022 maj 24;4(2). 023143. https://doi.org/10.1103/PhysRevResearch.4.023143

Author

Scherubl, Zoltan ; Fulop, Gergo ; Gramich, Jorg ; Palyi, Andras ; Schonenberger, Christian ; Nygard, Jesper ; Csonka, Szabolcs. / From Cooper pair splitting to nonlocal spectroscopy of a Shiba state. I: Physical Review Research. 2022 ; Bind 4, Nr. 2.

Bibtex

@article{704202a538e144d9bdd7e612bf588149,
title = "From Cooper pair splitting to nonlocal spectroscopy of a Shiba state",
abstract = "Cooper pair splitting (CPS) is a way to create spatially separated, entangled electron pairs. To this day, CPS is often identified in experiments as a spatial current correlation. However, such correlations can arise even in the absence of CPS, when a quantum dot is strongly coupled to the superconductor, and a subgap Shiba state is formed. Here, we present a detailed experimental characterization of those spatial current correlations, as the tunnel barrier strength between the quantum dot and the neighboring normal electrode is tuned. The correlation of the nonlocal signal and the barrier strength reveals a competition between CPS and the nonlocal probing of the Shiba state. We describe our experiment with a simple transport model and obtain the tunnel couplings of our device by fitting the model's prediction to the measured conductance correlation curve. Furthermore, we use our theory to extract the contribution of CPS to the nonlocal signal.",
keywords = "ANDREEV BOUND-STATES, TRANSPORT, ENTANGLEMENT, GROWTH, DOT",
author = "Zoltan Scherubl and Gergo Fulop and Jorg Gramich and Andras Palyi and Christian Schonenberger and Jesper Nygard and Szabolcs Csonka",
year = "2022",
month = may,
day = "24",
doi = "10.1103/PhysRevResearch.4.023143",
language = "English",
volume = "4",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "AMER PHYSICAL SOC",
number = "2",

}

RIS

TY - JOUR

T1 - From Cooper pair splitting to nonlocal spectroscopy of a Shiba state

AU - Scherubl, Zoltan

AU - Fulop, Gergo

AU - Gramich, Jorg

AU - Palyi, Andras

AU - Schonenberger, Christian

AU - Nygard, Jesper

AU - Csonka, Szabolcs

PY - 2022/5/24

Y1 - 2022/5/24

N2 - Cooper pair splitting (CPS) is a way to create spatially separated, entangled electron pairs. To this day, CPS is often identified in experiments as a spatial current correlation. However, such correlations can arise even in the absence of CPS, when a quantum dot is strongly coupled to the superconductor, and a subgap Shiba state is formed. Here, we present a detailed experimental characterization of those spatial current correlations, as the tunnel barrier strength between the quantum dot and the neighboring normal electrode is tuned. The correlation of the nonlocal signal and the barrier strength reveals a competition between CPS and the nonlocal probing of the Shiba state. We describe our experiment with a simple transport model and obtain the tunnel couplings of our device by fitting the model's prediction to the measured conductance correlation curve. Furthermore, we use our theory to extract the contribution of CPS to the nonlocal signal.

AB - Cooper pair splitting (CPS) is a way to create spatially separated, entangled electron pairs. To this day, CPS is often identified in experiments as a spatial current correlation. However, such correlations can arise even in the absence of CPS, when a quantum dot is strongly coupled to the superconductor, and a subgap Shiba state is formed. Here, we present a detailed experimental characterization of those spatial current correlations, as the tunnel barrier strength between the quantum dot and the neighboring normal electrode is tuned. The correlation of the nonlocal signal and the barrier strength reveals a competition between CPS and the nonlocal probing of the Shiba state. We describe our experiment with a simple transport model and obtain the tunnel couplings of our device by fitting the model's prediction to the measured conductance correlation curve. Furthermore, we use our theory to extract the contribution of CPS to the nonlocal signal.

KW - ANDREEV BOUND-STATES

KW - TRANSPORT

KW - ENTANGLEMENT

KW - GROWTH

KW - DOT

U2 - 10.1103/PhysRevResearch.4.023143

DO - 10.1103/PhysRevResearch.4.023143

M3 - Journal article

VL - 4

JO - Physical Review Research

JF - Physical Review Research

SN - 2643-1564

IS - 2

M1 - 023143

ER -

ID: 311908989