Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45. / Chatzopoulos, Damianos; Cho, Doohee; Bastiaans, Koen M.; Steffensen, Gorm O.; Bouwmeester, Damian; Akbari, Alireza; Gu, Genda; Paaske, Jens; Andersen, Brian M.; Allan, Milan P.

In: Nature Communications, Vol. 12, No. 1, 298, 12.01.2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Chatzopoulos, D, Cho, D, Bastiaans, KM, Steffensen, GO, Bouwmeester, D, Akbari, A, Gu, G, Paaske, J, Andersen, BM & Allan, MP 2021, 'Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45', Nature Communications, vol. 12, no. 1, 298. https://doi.org/10.1038/s41467-020-20529-x

APA

Chatzopoulos, D., Cho, D., Bastiaans, K. M., Steffensen, G. O., Bouwmeester, D., Akbari, A., Gu, G., Paaske, J., Andersen, B. M., & Allan, M. P. (2021). Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45. Nature Communications, 12(1), [298]. https://doi.org/10.1038/s41467-020-20529-x

Vancouver

Chatzopoulos D, Cho D, Bastiaans KM, Steffensen GO, Bouwmeester D, Akbari A et al. Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45. Nature Communications. 2021 Jan 12;12(1). 298. https://doi.org/10.1038/s41467-020-20529-x

Author

Chatzopoulos, Damianos ; Cho, Doohee ; Bastiaans, Koen M. ; Steffensen, Gorm O. ; Bouwmeester, Damian ; Akbari, Alireza ; Gu, Genda ; Paaske, Jens ; Andersen, Brian M. ; Allan, Milan P. / Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45. In: Nature Communications. 2021 ; Vol. 12, No. 1.

Bibtex

@article{1e32045c3edb438ea0cae8f4c2edc15e,
title = "Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45",
abstract = "By using scanning tunneling microscopy (STM) we find and characterize dispersive, energy-symmetric in-gap states in the iron-based superconductor FeTe0.55Se0.45, a material that exhibits signatures of topological superconductivity, and Majorana bound states at vortex cores or at impurity locations. We use a superconducting STM tip for enhanced energy resolution, which enables us to show that impurity states can be tuned through the Fermi level with varying tip-sample distance. We find that the impurity state is of the Yu-Shiba-Rusinov (YSR) type, and argue that the energy shift is caused by the low superfluid density in FeTe0.55Se0.45, which allows the electric field of the tip to slightly penetrate the sample. We model the newly introduced tip-gating scenario within the single-impurity Anderson model and find good agreement to the experimental data.",
keywords = "IMPURITY STATES, FERMIONS, VISUALIZATION, FLUCTUATIONS, CONDUCTANCE",
author = "Damianos Chatzopoulos and Doohee Cho and Bastiaans, {Koen M.} and Steffensen, {Gorm O.} and Damian Bouwmeester and Alireza Akbari and Genda Gu and Jens Paaske and Andersen, {Brian M.} and Allan, {Milan P.}",
year = "2021",
month = jan,
day = "12",
doi = "10.1038/s41467-020-20529-x",
language = "English",
volume = "12",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "nature publishing group",
number = "1",

}

RIS

TY - JOUR

T1 - Spatially dispersing Yu-Shiba-Rusinov states in the unconventional superconductor FeTe0.55Se0.45

AU - Chatzopoulos, Damianos

AU - Cho, Doohee

AU - Bastiaans, Koen M.

AU - Steffensen, Gorm O.

AU - Bouwmeester, Damian

AU - Akbari, Alireza

AU - Gu, Genda

AU - Paaske, Jens

AU - Andersen, Brian M.

AU - Allan, Milan P.

PY - 2021/1/12

Y1 - 2021/1/12

N2 - By using scanning tunneling microscopy (STM) we find and characterize dispersive, energy-symmetric in-gap states in the iron-based superconductor FeTe0.55Se0.45, a material that exhibits signatures of topological superconductivity, and Majorana bound states at vortex cores or at impurity locations. We use a superconducting STM tip for enhanced energy resolution, which enables us to show that impurity states can be tuned through the Fermi level with varying tip-sample distance. We find that the impurity state is of the Yu-Shiba-Rusinov (YSR) type, and argue that the energy shift is caused by the low superfluid density in FeTe0.55Se0.45, which allows the electric field of the tip to slightly penetrate the sample. We model the newly introduced tip-gating scenario within the single-impurity Anderson model and find good agreement to the experimental data.

AB - By using scanning tunneling microscopy (STM) we find and characterize dispersive, energy-symmetric in-gap states in the iron-based superconductor FeTe0.55Se0.45, a material that exhibits signatures of topological superconductivity, and Majorana bound states at vortex cores or at impurity locations. We use a superconducting STM tip for enhanced energy resolution, which enables us to show that impurity states can be tuned through the Fermi level with varying tip-sample distance. We find that the impurity state is of the Yu-Shiba-Rusinov (YSR) type, and argue that the energy shift is caused by the low superfluid density in FeTe0.55Se0.45, which allows the electric field of the tip to slightly penetrate the sample. We model the newly introduced tip-gating scenario within the single-impurity Anderson model and find good agreement to the experimental data.

KW - IMPURITY STATES

KW - FERMIONS

KW - VISUALIZATION

KW - FLUCTUATIONS

KW - CONDUCTANCE

U2 - 10.1038/s41467-020-20529-x

DO - 10.1038/s41467-020-20529-x

M3 - Journal article

C2 - 33436594

VL - 12

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 298

ER -

ID: 278482759