# Inhomogeneity-driven multiform Spontaneous Hall Effect in conventional and unconventional superconductors

https://mdr.nims.go.jp/datasets/6f7c0a9c-c3a6-4190-ac08-989173a220fd

## File

- [STAM-2025-0081_Data.zip](https://mdr.nims.go.jp/filesets/57a777d3-3b74-4fcf-8eb8-db5276dab5a6/download) ([Detail](https://mdr.nims.go.jp/filesets/57a777d3-3b74-4fcf-8eb8-db5276dab5a6.md))
- [Supp_Materials.pdf](https://mdr.nims.go.jp/filesets/ea98bc29-b59b-4e1e-9bd7-a0e891d8a03f/download) ([Detail](https://mdr.nims.go.jp/filesets/ea98bc29-b59b-4e1e-9bd7-a0e891d8a03f.md))
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## Id

6f7c0a9c-c3a6-4190-ac08-989173a220fd

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-08-22T02:28:17.592937Z

## Updated at

2025-08-22T07:30:24.164666Z

## Published at

2025-08-22T07:19:07.542987Z

## Doi

https://doi.org/10.48505/nims.5659

## First published url

https://doi.org/10.1080/14686996.2025.2546282

## Date published

2025-12-31

## Recorded date published

2025-12-31

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Inhomogeneity-driven multiform Spontaneous Hall Effect in conventional and
    unconventional superconductors
  title_type: original
  lang: en

## Description

- description: The spontaneous Hall effect (SHE), a finite voltage occurring transversal
    to the electrical current in zero-magnetic field, has been observed in both conventional
    and unconventional superconductors, appearing as a peak near the superconducting
    transition temperature. The origin of SHE is strongly debated, with proposed explanations
    ranging from intrinsic and extrinsic mechanisms such as spontaneous symmetry breaking
    and time-reversal symmetry breaking (BTRS), Abrikosov vortex motion, or extrinsic
    factors like material inhomogeneities, such as non-uniform critical temperature
    (Tc) distributions or structural asymmetries. This work is an experimental study
    of the SHE in various superconducting materials. We focused on conventional, low-Tc,
    sharp transition Nb and unconventional, intermediate-Tc, smeared transition Fe(Se,Te).
    Our findings show distinct SHE peaks around the superconducting transition, with
    variations in height, sign and shape, indicating a possible common mechanism independent
    of the specific material. We propose that spatial inhomogeneities in the critical
    temperature, caused by local chemical composition variations, disorder, or other
    forms of electronic spatial inhomogeneities could explain the appearing of the
    SHE. This hypothesis is supported by comprehensive finite elements simulations
    of randomly distributed Tc’s by varying Tc-distribution, spatial scale of disorder
    and amplitude of the superconducting transition. The comparison between experimental
    results and simulations suggests a unified origin for the SHE in different superconductors,
    whereas different phenomenology can be explained in terms of amplitude of the
    transition temperature in respect to Tc-distribution.
  description_type: abstract
  lang: en

## Creator

- name: Nadia Stegani
  role: author
  organization: a University of Genoa
- name: Ilaria Pallecchi
  role: author
- name: Nicola Manca
  role: author
- name: Martina Meinero
  role: author
- name: Michela Iebole
  role: author
- name: Matteo Cialone
  role: author
- name: Valeria Braccini
  role: author
- name: Koushik Karmakar
  role: author
- name: Andrey Maljuk
  role: author
- name: Bernd Büchner
  role: author
- name: Vadim Grinenko
  role: author
- name: Marina Putti
  role: author
- name: Federico Caglieris
  role: author

## Contact agent



## Publisher

organization: Taylor & Francis

## Managing organization



## Keyword

- subject: Inhomogeneities
  schema: not_defined
- subject: superconductors
  schema: not_defined
- subject: spontaneous hall effect
  schema: not_defined
- subject: simulations
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Science and Technology of Advanced Materials
  issn: '14686996'
  volume: '26'
  article_number: '2546282'

## Conference



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## Instrument



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: 57a777d3-3b74-4fcf-8eb8-db5276dab5a6
  filename: STAM-2025-0081_Data.zip
  content_type: application/zip
  size: 414975
  md5: 3c7cc39f683bf05663ca134830d07e3a
- id: ea98bc29-b59b-4e1e-9bd7-a0e891d8a03f
  filename: Supp_Materials.pdf
  content_type: application/pdf
  size: 276298
  md5: d99e16542a161970529b5f98f1b05e1b
- id: 689ed2ec-704a-4b15-aa65-84a863503be9
  filename: Inhomogeneity-driven multiform spontaneous Hall effect in conventional
    and unconventional superconductors.pdf
  content_type: application/pdf
  size: 5490867
  md5: 0bced3137f275cb3eece588cf4e300dd

## Thumbnail

fileset_id: ea98bc29-b59b-4e1e-9bd7-a0e891d8a03f
filename: Supp_Materials.pdf