# Anisotropic transport of Josephson vortices in atomic-layer superconductors on vicinal surfaces

https://mdr.nims.go.jp/datasets/341fed38-e327-4608-b47a-12fe86acb640

## File

- [ms_v2.pdf](https://mdr.nims.go.jp/filesets/5646c0a4-fb7a-43e7-a3a3-3aa83c722e4b/download) ([Detail](https://mdr.nims.go.jp/filesets/5646c0a4-fb7a-43e7-a3a3-3aa83c722e4b.md))

## Id

341fed38-e327-4608-b47a-12fe86acb640

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-08-02T12:40:08.066910Z

## Updated at

2026-08-03T00:07:51.287821Z

## Published at

2026-08-03T01:28:56.682680Z

## Doi

https://doi.org/10.48505/nims.6434

## First published url

https://doi.org/10.1103/b2j3-xj19

## Date published

2026-07-30

## Recorded date published

2026-7

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Anisotropic transport of Josephson vortices in atomic-layer superconductors
    on vicinal surfaces
  title_type: original
  lang: en

## Description

- description: Atomic steps have strong influences on surface two-dimensional superconductors.
    Josephson vortices formed at the atomic steps under magnetic fields may dominate
    transport phenomena at low temperatures, but its experimental verification is
    still lacking. Here, we report the vortex transport properties of atomic-layer
    superconductor Si(111)-(root7xroot3)-In with vicinal surfaces, for which Josephson
    vortices are directly observed by scanning tunneling microscopy. A sharp drop
    in resistance with decreasing temperature T, detected under out-of-plane magnetic
    field B, reveals a distinctive anisotropy with respect to the atomic step direction.
    The anisotropy of sheet resistance, proportional to that of vortex mobility, amounts
    to the order of 10^3 at intermediate magnetic fields. In the high-T and low-B
    region, Josephson vortices exhibit thermally excited creep motions with anisotropic
    activation energy U_act. A further increase in B suppresses U_act toward zero
    anisotropically, resulting in one-dimensional pinning-free vortex flow at 0.10
    < B < 0.20 T. At the lowest temperatures, the vortex motion is governed by quantum
    tunneling. A B-T phase diagram constructed based on these measurements reveals
    multiple regions characterized by directionally dependent vortex-transport mechanisms.
  description_type: abstract
  lang: und

## Creator

- name: Wenxuan Qian
  role: author
- name: Yash Chauhan
  role: author
  orcid: https://orcid.org/0009-0000-9371-2813
- name: Ryohei Nemoto
  role: author
  orcid: https://orcid.org/0000-0002-7343-7268
- name: Keisuke Sagisaka
  role: author
  orcid: https://orcid.org/0000-0002-5089-4271
- name: Shunsuke Yoshizawa
  role: author
  orcid: https://orcid.org/0000-0003-3380-5473
- name: Takashi Uchihashi
  role: author
  orcid: https://orcid.org/0000-0003-0811-5665

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: superconductivity
  schema: not_defined
- subject: surface
  schema: not_defined
- subject: atomic step
  schema: not_defined
- subject: Josephson vortex
  schema: not_defined
- subject: transport
  schema: not_defined
- subject: anisotropy
  schema: not_defined

## Rights

- description: "©2026 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



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## Embargo



## Journal

- title: Physical Review B
  issn: '24699950'
  volume: '114'
  issue: '5'
  article_number: '055422'

## Conference



## Related item



## Funding

- identifier: 25H00867
  funder_name: Japan Society for the Promotion of Science
- identifier: 24K01351
  funder_name: Japan Society for the Promotion of Science
- identifier: 22H01961
  funder_name: Japan Society for the Promotion of Science
- identifier: 25K01670
  funder_name: Japan Society for the Promotion of Science
- funder_name: Ministry of Education, Culture, Sports, Science and Technology

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## Fileset

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  filename: ms_v2.pdf
  content_type: application/pdf
  size: 1198128
  md5: a4a6b9661f6d1807a7c1121f256c6864

## Thumbnail

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filename: ms_v2.pdf