On the remarkable superconductivity of FeSe and its close cousins

A Kreisel, PJ Hirschfeld, BM Andersen - Symmetry, 2020 - mdpi.com
Emergent electronic phenomena in iron-based superconductors have been at the forefront
of condensed matter physics for more than a decade. Much has been learned about the …

Electronic Nematic States Tuned by Isoelectronic Substitution in Bulk FeSe1−x S x

AI Coldea - Frontiers in Physics, 2021 - frontiersin.org
Isoelectronic substitution is an ideal tuning parameter to alter electronic states and
correlations in iron-based superconductors. As this substitution takes place outside the …

Interplay between superconductivity and the strange-metal state in FeSe

X Jiang, M Qin, X Wei, L Xu, J Ke, H Zhu, R Zhang… - Nature Physics, 2023 - nature.com
In contrast to conventional Fermi liquids where resistivity scales quadratically with
temperature, unconventional superconductors usually exhibit a normal-state resistivity that …

Nematic energy scale and the missing electron pocket in FeSe

M Yi, H Pfau, Y Zhang, Y He, H Wu, T Chen, ZR Ye… - Physical Review X, 2019 - APS
Superconductivity emerges in proximity to a nematic phase in most iron-based
superconductors. It is therefore important to understand the impact of nematicity on the …

Correlation-driven electronic reconstruction in FeTe1−xSex

J Huang, R Yu, Z Xu, JX Zhu, JS Oh, Q Jiang… - Communications …, 2022 - nature.com
Electronic correlation is of fundamental importance to high temperature superconductivity.
While the low energy electronic states in cuprates are dominantly affected by correlation …

Spontaneous orbital polarization in the nematic phase of FeSe

CA Occhialini, JJ Sanchez, Q Song, G Fabbris… - Nature Materials, 2023 - nature.com
The origin of nematicity in FeSe remains a critical outstanding question towards
understanding unconventional superconductivity in proximity to nematic order. To …

Nanoscale vector AC magnetometry with a single nitrogen-vacancy center in diamond

G Wang, YX Liu, Y Zhu, P Cappellaro - Nano Letters, 2021 - ACS Publications
Detection of AC magnetic fields at the nanoscale is critical in applications ranging from
fundamental physics to materials science. Isolated quantum spin defects, such as the …

Evolution of spin excitations from bulk to monolayer FeSe

J Pelliciari, S Karakuzu, Q Song, R Arpaia… - Nature …, 2021 - nature.com
In ultrathin films of FeSe grown on SrTiO3 (FeSe/STO), the superconducting transition
temperature T c is increased by almost an order of magnitude, raising questions on the …

Relationship between transport anisotropy and nematicity in FeSe

JM Bartlett, A Steppke, S Hosoi, H Noad, J Park… - Physical Review X, 2021 - APS
The mechanism behind the nematicity of FeSe is not known. Through elastoresitivity
measurements it has been shown to be an electronic instability. However, thus far …

Highly anisotropic superconducting gap near the nematic quantum critical point of FeSe1−xSx

PK Nag, K Scott, VS de Carvalho, JK Byland, X Yang… - Nature Physics, 2024 - nature.com
Nematic phases, in which electrons in a solid spontaneously break rotational symmetry
while preserving translational symmetry, exist in several families of unconventional …