Nematically Templated Vortex Lattices in Superconducting FeSe

Sang Yong Song; Chengyun Hua; Luke Bell; Wonhee Ko; Hans Fangohr; Jiaqiang Yan; Gábor B. Halász; Eugene F. Dumitrescu; Benjamin J. Lawrie; Petro Maksymovych

doi:10.1021/acs.nanolett.3c00125

Nematically Templated Vortex Lattices in Superconducting FeSe

Sang Yong Song, Chengyun Hua, Luke Bell, Wonhee Ko, Hans Fangohr, Jiaqiang Yan, Gábor B. Halász, Eugene F. Dumitrescu, Benjamin J. Lawrie, Petro Maksymovych

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

New pathways to controlling the morphology of superconducting vortex lattices─and their subsequent dynamics─are required to guide and scale vortex world-lines into a computing platform. We have found that the nematic twin boundaries align superconducting vortices in the adjacent terraces due to the incommensurate potential between vortices surrounding twin boundaries and those trapped within them. With the varying density and morphology of twin boundaries, the vortex lattice assumes several distinct structural phases, including square, regular, and irregular one-dimensional lattices. Through concomitant analysis of vortex lattice models, we have inferred the characteristic energetics of the twin boundary potential and furthermore predicted the existence of geometric size effects as a function of increasing confinement by the twin boundaries. These findings extend the ideas of directed control over vortex lattices to intrinsic topological defects and their self-organized networks, which have direct implications for the future design and control of strain-based topological quantum computing architectures.

Original language	English
Pages (from-to)	2822-2830
Number of pages	9
Journal	Nano Letters
Volume	23
Issue number	7
DOIs	https://doi.org/10.1021/acs.nanolett.3c00125
State	Published - Apr 12 2023

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.

Funding

This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division. Scanning tunneling microscopy was performed at the Center for Nanophase Materials Sciences (CNMS), which is a US Department of Energy, Office of Science User Facility at Oak Ridge National Laboratory. This work was supported in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists (WDTS) under the Science Undergraduate Laboratory Internships (SULI) program.

Funders	Funder number
Center for Nanophase Materials Sciences
Office of Workforce Development for Teachers
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory
Division of Materials Sciences and Engineering

Keywords

FeSe
Langevin dynamics simulation
scanning tunneling microscope
templated vortex lattice
twin boundary
vortex

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10.1021/acs.nanolett.3c00125

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title = "Nematically Templated Vortex Lattices in Superconducting FeSe",

abstract = "New pathways to controlling the morphology of superconducting vortex lattices─and their subsequent dynamics─are required to guide and scale vortex world-lines into a computing platform. We have found that the nematic twin boundaries align superconducting vortices in the adjacent terraces due to the incommensurate potential between vortices surrounding twin boundaries and those trapped within them. With the varying density and morphology of twin boundaries, the vortex lattice assumes several distinct structural phases, including square, regular, and irregular one-dimensional lattices. Through concomitant analysis of vortex lattice models, we have inferred the characteristic energetics of the twin boundary potential and furthermore predicted the existence of geometric size effects as a function of increasing confinement by the twin boundaries. These findings extend the ideas of directed control over vortex lattices to intrinsic topological defects and their self-organized networks, which have direct implications for the future design and control of strain-based topological quantum computing architectures.",

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AU - Song, Sang Yong

AU - Hua, Chengyun

AU - Bell, Luke

AU - Ko, Wonhee

AU - Fangohr, Hans

AU - Yan, Jiaqiang

AU - Halász, Gábor B.

AU - Dumitrescu, Eugene F.

AU - Lawrie, Benjamin J.

AU - Maksymovych, Petro

PY - 2023/4/12

Y1 - 2023/4/12

N2 - New pathways to controlling the morphology of superconducting vortex lattices─and their subsequent dynamics─are required to guide and scale vortex world-lines into a computing platform. We have found that the nematic twin boundaries align superconducting vortices in the adjacent terraces due to the incommensurate potential between vortices surrounding twin boundaries and those trapped within them. With the varying density and morphology of twin boundaries, the vortex lattice assumes several distinct structural phases, including square, regular, and irregular one-dimensional lattices. Through concomitant analysis of vortex lattice models, we have inferred the characteristic energetics of the twin boundary potential and furthermore predicted the existence of geometric size effects as a function of increasing confinement by the twin boundaries. These findings extend the ideas of directed control over vortex lattices to intrinsic topological defects and their self-organized networks, which have direct implications for the future design and control of strain-based topological quantum computing architectures.

AB - New pathways to controlling the morphology of superconducting vortex lattices─and their subsequent dynamics─are required to guide and scale vortex world-lines into a computing platform. We have found that the nematic twin boundaries align superconducting vortices in the adjacent terraces due to the incommensurate potential between vortices surrounding twin boundaries and those trapped within them. With the varying density and morphology of twin boundaries, the vortex lattice assumes several distinct structural phases, including square, regular, and irregular one-dimensional lattices. Through concomitant analysis of vortex lattice models, we have inferred the characteristic energetics of the twin boundary potential and furthermore predicted the existence of geometric size effects as a function of increasing confinement by the twin boundaries. These findings extend the ideas of directed control over vortex lattices to intrinsic topological defects and their self-organized networks, which have direct implications for the future design and control of strain-based topological quantum computing architectures.

KW - FeSe

KW - Langevin dynamics simulation

KW - scanning tunneling microscope

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Nematically Templated Vortex Lattices in Superconducting FeSe

Abstract

Bibliographical note

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Keywords

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