DOI > 10.5291/ILL-DATA.5-42-519

This proposal is publicly available since 02/17/2025

Title

Probing the vortex lattice in the iron-based superconductor FeSe

Abstract

The discovery of Fe-based superconductors is among the most significant milestones in the area of high-Tc superconductivity (SC) in the past decade. An enormous amount of effort has been devoted to understanding the pairing mechanism, as well as the symmetry and structure of the superconducting gap in these systems. For a type-II superconductor, which is characterized by the partial admission of external magnetic fields to the bulk in the form of vortices, the aforementioned key SC properties can be extracted by studying the vortex lattice (VL). Small-angle neutron scattering (SANS) is a powerful reciprocal space technique to study the VL. It has served a key role in understanding unconventional SC. FeSe, despite being the structurally simplest iron-based superconductor, has exotic SC. For example, there exists a strong interplay between SC, magnetic, orbital and nematic order parameters. The driving mechanism of the SC in FeSe is the subject of great debates. This project aims to systematically explore the VL structure in FeSe, through which we hold a great opportunity to understand the effect of orbital selectivity, magnetic fluctuations and electronic nematicity on its SC.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

SHEN Lingjia; Ahmed Alshemi; BLACKBURN Elizabeth; CAMPILLO Emma; CUBITT Robert; FORGAN Edward M.; Alexander T Holmes and Denis M. Vasiukov. (2020). Probing the vortex lattice in the iron-based superconductor FeSe. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-519

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Metadata

Experiment Parameters

  • Environment temperature

    0.1 K - 10 K

Sample Parameters

  • Formula

    • FeSe