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Evolution of the low-temperature Fermi surface of superconducting FeSe_1−xS_x across a nematic phase transition

Amalia I. Coldea
Samuel F. Blake
Andrew J. Schofield
ResearchOpen Access04 Jan 2019
npj Quantum Materials

Volume: 4, P: 1-7
Anisotropic magnetic interactions in a candidate Kitaev spin liquid close to a metal-insulator transition

Quantum spin liquids are materials predicted to be absent of magnetic ordering at low temperature, giving rise to fractionalised electronic states, but conclusive experimental evidence is still absent. Here, the authors conduct angular dependent torque measurements on the candidate spin liquid material RuI3 and, through a comparison of experimental and theoretical results, provide evidence indicating the presence of frustrated magnetic interactions in the system.

Zeyu Ma
Danrui Ni
Amalia I. Coldea
ResearchOpen Access29 Nov 2024
Communications Physics

Volume: 7, P: 1-8
Quenched nematic criticality and two superconducting domes in an iron-based superconductor

Using sulfur doping and pressure, the authors separate the nematic and magnetic phase transitions in FeSe. They find that a Lifshitz transition sits between two independent superconducting domes where nematic critical fluctuations remain finite.

Pascal Reiss
David Graf
Amalia I. Coldea
Research28 Oct 2019
Nature Physics

Volume: 16, P: 89-94
Collapse of metallicity and high-T_c superconductivity in the high-pressure phase of FeSe_0.89S_0.11

Pascal Reiss
Alix McCollam
Amalia I. Coldea
ResearchOpen Access30 Sept 2024
npj Quantum Materials

Volume: 9, P: 1-9
Resurgence of superconductivity and the role of dxy hole band in FeSe_1−xTe_x

The iron chalcogenide material FeSe1-xTex constitutes an important family of unconventional superconductors but its nematic phase was less explored due to a lack of single crystals. In this study, the authors provide a systematic study of the electronic structure for nematic FeSe1-xTex and observe that as the Te content increases a gradual shift and renormalization of the dxy orbital occurs, concomitant with the enhancement of superconductivity.

Archie B. Morfoot
Timur K. Kim
Amalia I. Coldea
ResearchOpen Access19 Dec 2023
Communications Physics

Volume: 6, P: 1-9
Suppression of superconductivity and enhanced critical field anisotropy in thin flakes of FeSe

Liam S. Farrar
Matthew Bristow
Amalia I. Coldea
ResearchOpen Access15 May 2020
npj Quantum Materials

Volume: 5, P: 1-7
Iron pnictides and chalcogenides: a new paradigm for superconductivity

The progress and the outstanding issues in understanding the correlated phases in the unconventional iron-based superconductors is reviewed.

Rafael M. Fernandes
Amalia I. Coldea
Gabriel Kotliar
Reviews05 Jan 2022
Nature

Volume: 601, P: 35-44
Unveiling the quasiparticle behaviour in the pressure-induced high-T_c phase of an iron-chalcogenide superconductor

Z. Zajicek
P. Reiss
A. I. Coldea
ResearchOpen Access08 Jul 2024
npj Quantum Materials

Volume: 9, P: 1-8

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