Amorphous topological superconductivity in a Shiba glass

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Amorphous topological superconductivity in a Shiba glass. / Pöyhönen, Kim; Sahlberg, Isac; Westström, Alex; Ojanen, Teemu.

In: Nature Communications, Vol. 9, No. 1, 2103, 01.12.2018, p. 1-5.

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@article{30740e94352e44a6ac2d8f0ecd882267,
title = "Amorphous topological superconductivity in a Shiba glass",
abstract = "Topological states of matter support quantised nondissipative responses and exotic quantum particles that cannot be accessed in common materials. The exceptional properties and application potential of topological materials have triggered a large-scale search for new realisations. Breaking away from the popular trend focusing almost exclusively on crystalline symmetries, we introduce the Shiba glass as a platform for amorphous topological quantum matter. This system consists of an ensemble of randomly distributed magnetic atoms on a superconducting surface. We show that subgap Yu-Shiba-Rusinov states on the magnetic moments form a topological superconducting phase at critical density despite a complete absence of spatial order. Experimental signatures of the amorphous topological state can be obtained by scanning tunnelling microscopy measurements probing the topological edge mode. Our discovery demonstrates the physical feasibility of amorphous topological quantum matter, presenting a concrete route to fabricating new topological systems from nontopological materials with random dopants.",
author = "Kim P{\"o}yh{\"o}nen and Isac Sahlberg and Alex Weststr{\"o}m and Teemu Ojanen",
year = "2018",
month = "12",
day = "1",
doi = "10.1038/s41467-018-04532-x",
language = "English",
volume = "9",
pages = "1--5",
journal = "Nature Communications",
issn = "2041-1723",
number = "1",

}

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TY - JOUR

T1 - Amorphous topological superconductivity in a Shiba glass

AU - Pöyhönen, Kim

AU - Sahlberg, Isac

AU - Westström, Alex

AU - Ojanen, Teemu

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Topological states of matter support quantised nondissipative responses and exotic quantum particles that cannot be accessed in common materials. The exceptional properties and application potential of topological materials have triggered a large-scale search for new realisations. Breaking away from the popular trend focusing almost exclusively on crystalline symmetries, we introduce the Shiba glass as a platform for amorphous topological quantum matter. This system consists of an ensemble of randomly distributed magnetic atoms on a superconducting surface. We show that subgap Yu-Shiba-Rusinov states on the magnetic moments form a topological superconducting phase at critical density despite a complete absence of spatial order. Experimental signatures of the amorphous topological state can be obtained by scanning tunnelling microscopy measurements probing the topological edge mode. Our discovery demonstrates the physical feasibility of amorphous topological quantum matter, presenting a concrete route to fabricating new topological systems from nontopological materials with random dopants.

AB - Topological states of matter support quantised nondissipative responses and exotic quantum particles that cannot be accessed in common materials. The exceptional properties and application potential of topological materials have triggered a large-scale search for new realisations. Breaking away from the popular trend focusing almost exclusively on crystalline symmetries, we introduce the Shiba glass as a platform for amorphous topological quantum matter. This system consists of an ensemble of randomly distributed magnetic atoms on a superconducting surface. We show that subgap Yu-Shiba-Rusinov states on the magnetic moments form a topological superconducting phase at critical density despite a complete absence of spatial order. Experimental signatures of the amorphous topological state can be obtained by scanning tunnelling microscopy measurements probing the topological edge mode. Our discovery demonstrates the physical feasibility of amorphous topological quantum matter, presenting a concrete route to fabricating new topological systems from nontopological materials with random dopants.

UR - http://www.scopus.com/inward/record.url?scp=85047865496&partnerID=8YFLogxK

U2 - 10.1038/s41467-018-04532-x

DO - 10.1038/s41467-018-04532-x

M3 - Article

VL - 9

SP - 1

EP - 5

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 2103

ER -

ID: 25711562