TY  - INPR
A1  - Valadkhani, Adrian
A1  - Zúñiga Céspedes, Belén Elizabeth
A1  - Mandloi, Salony
A1  - Xu, Mingyu
A1  - Schmidt, Juan
A1  - Bud’ko, Sergey L.
A1  - Canfield, Paul C.
A1  - Valentí, Roser
A1  - Gati, Elena Aurelia
T1  - Tuning superconductivity and spin-vortex fluctuations in CaKFe4As4 through in-plane antisymmetric strains
T2  - arXiv
N2  - Lattice strains of appropriate symmetry have served as an excellent tool to explore the interaction of superconductivity in the iron-based superconductors with nematic and stripe spin-density wave (SSDW) order, which are both closely tied to an orthorhombic distortion. In this work, we contribute to a broader understanding of the coupling of strain to superconductivity and competing normal-state orders by studying CaKFe4As4 under large, in-plane strains of B1g and B2g symmetry. In contrast to the majority of iron-based superconductors, pure CaKFe4As4 exhibits superconductivity with relatively high transition temperature of Tc∼35 K in proximity of a non-collinear, tetragonal, hedgehog spin-vortex crystal (SVC) order. Through experiments, we demonstrate an anisotropic in-plane strain response of Tc, which is reminiscent of the behavior of other pnictides with nematicity. However, our calculations suggest that in CaKFe4As4, this anisotropic response correlates with the one of the SVC fluctuations, highlighting the close interrelation of magnetism and high-Tc superconductivity. By suggesting moderate B2g strains as an effective parameter to change the stability of SVC and SSDW, we outline a pathway to a unified phase diagram of iron-based superconductivity.
Y1  - 2023
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/82436
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-824369
UR  - https://arxiv.org/abs/2307.10604v1
IS  - 2307.10604 Version 1
PB  - arXiv
ER  -