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Magnetic manipulation of topological states in p-wave superconductors.

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Title: Magnetic manipulation of topological states in p-wave superconductors.
Authors: Mercaldo, Maria Teresa1 mtm@physics.unisa.it, Cuoco, Mario1,2, Kotetes, Panagiotis3
Source: Physica B. May2018, Vol. 536, p730-733. 4p.
Subjects: Superconductors, Topological spaces, Heterostructures, Magnetic fields, Majorana fermions, Hopping conduction
Abstract: Substantial experimental investigation has provided evidence for spin-triplet pairing in diverse classes of materials and in a variety of artificial heterostructures. One of the fundamental challenges in this framework is how to manipulate the topological behavior of p-wave superconductors (PSC). In this work we investigate the magnetic field response of one-dimensional (1d) PSCs and we focus on the relation between the structure of the Cooper pair spin-configuration and the occurrence of topological phases with an enhanced number N of Majorana fermions per edge. The topological phase diagram, consisting of phases harboring Majorana modes, becomes significantly modified when one tunes the strength of the applied field, the direction of the d -vector and allows for long range hopping amplitudes in the 1d PSC. We find transitions between phases with different number N of Majorana fermions per edge and we show how they can be both induced by a variation of the hopping strength and a spin rotation of d . [ABSTRACT FROM AUTHOR]
Copyright of Physica B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 129334879
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Magnetic manipulation of topological states in p-wave superconductors.
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  Data: <searchLink fieldCode="AR" term="%22Mercaldo%2C+Maria+Teresa%22">Mercaldo, Maria Teresa</searchLink><relatesTo>1</relatesTo><i> mtm@physics.unisa.it</i><br /><searchLink fieldCode="AR" term="%22Cuoco%2C+Mario%22">Cuoco, Mario</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kotetes%2C+Panagiotis%22">Kotetes, Panagiotis</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Physica+B%22">Physica B</searchLink>. May2018, Vol. 536, p730-733. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Superconductors%22">Superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Topological+spaces%22">Topological spaces</searchLink><br /><searchLink fieldCode="DE" term="%22Heterostructures%22">Heterostructures</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+fields%22">Magnetic fields</searchLink><br /><searchLink fieldCode="DE" term="%22Majorana+fermions%22">Majorana fermions</searchLink><br /><searchLink fieldCode="DE" term="%22Hopping+conduction%22">Hopping conduction</searchLink>
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  Data: Substantial experimental investigation has provided evidence for spin-triplet pairing in diverse classes of materials and in a variety of artificial heterostructures. One of the fundamental challenges in this framework is how to manipulate the topological behavior of p-wave superconductors (PSC). In this work we investigate the magnetic field response of one-dimensional (1d) PSCs and we focus on the relation between the structure of the Cooper pair spin-configuration and the occurrence of topological phases with an enhanced number N of Majorana fermions per edge. The topological phase diagram, consisting of phases harboring Majorana modes, becomes significantly modified when one tunes the strength of the applied field, the direction of the d -vector and allows for long range hopping amplitudes in the 1d PSC. We find transitions between phases with different number N of Majorana fermions per edge and we show how they can be both induced by a variation of the hopping strength and a spin rotation of d . [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Physica B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.physb.2017.11.007
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 4
        StartPage: 730
    Subjects:
      – SubjectFull: Superconductors
        Type: general
      – SubjectFull: Topological spaces
        Type: general
      – SubjectFull: Heterostructures
        Type: general
      – SubjectFull: Magnetic fields
        Type: general
      – SubjectFull: Majorana fermions
        Type: general
      – SubjectFull: Hopping conduction
        Type: general
    Titles:
      – TitleFull: Magnetic manipulation of topological states in p-wave superconductors.
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            NameFull: Cuoco, Mario
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              Text: May2018
              Type: published
              Y: 2018
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              Value: 536
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