Nematic transition and nanoscale suppression of superconductivity in Fe(Te,Se)

@article{Zhao2021NematicTA,
  title={Nematic transition and nanoscale suppression of superconductivity in Fe(Te,Se)},
  author={He Zhao and Hong Li and Lianyang Dong and Binjie Xu and John A. Schneeloch and Ruidan Zhong and Minghu Fang and Genda Gu and John W. Harter and Stephen D. Wilson and Ziqiang Wang and Ilija Zeljkovic},
  journal={Nature Physics},
  year={2021}
}
The interplay of different electronic phases underlies the physics of unconventional superconductors. One of the most intriguing examples is a high-Tc superconductor FeTe1-xSex – it undergoes both a topological transition, linked to the electronic band inversion, and an electronic nematic phase transition, associated with rotation symmetry breaking, around the same critical composition xc where superconducting Tc peaks. At this regime, nematic fluctuations and symmetry-breaking strain could… 
4 Citations
Correlation-driven electronic reconstruction in FeTe1−xSex
Electronic correlation is of fundamental importance to high temperature superconductivity. While the low energy electronic states in cuprates are dominantly affected by correlation effects across the
Visualization of edge-modulated charge-density-wave orders in monolayer transition-metal-dichalcogenide metal
In two-dimensional materials with the many-body quantum states, edges become especially significant for realizing a host of physical phenomena and for potential applications in nanodevices. Here, we
Signatures of a Quantum Griffiths Phase Close to an Electronic Nematic Quantum Phase Transition
In the vicinity of a quantum critical point, quenched disorder can lead to a quantum Griffiths phase, accompanied by an exotic power-law scaling with a continuously varying dynamical exponent that
Two distinct superconducting states controlled by orientations of local wrinkles in LiFeAs
TLDR
It is demonstrated that the local strain effect with different directions can tune the superconducting order parameter of LiFeAs very differently, suggesting that the band shifting induced by directional pressure may play an important role in iron-based superconductivity.

References

SHOWING 1-10 OF 44 REFERENCES
Two distinct superconducting pairing states divided by the nematic end point in FeSe1−xSx
TLDR
Using spectroscopic-imaging scanning tunneling microscopy, the electronic structure and the superconducting gap in FeSe1−xSx are investigated, which implies that the presence or absence of nematicity results in two distinct pairing states, whereas the pairing interaction is insensitive to the strength of Nematicity.
Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
Discerning the nematic connection The phase diagram of any given family of iron-based superconductors is complicated: Superconductivity competes with antiferromagnetism, with a structural transition
Divergent Nematic Susceptibility in an Iron Arsenide Superconductor
TLDR
Measurement of the divergent nematic susceptibility of the iron pnictide superconductor Ba(Fe1−xCox)2As2 distinguishes an electronic nematic phase transition from a simple ferroelastic distortion, and measurements indicate an Electronic nematic quantum phase transition near the composition with optimal superconducting transition temperature.
Quenched nematic criticality and two superconducting domes in an iron-based superconductor
The nematic electronic state and its associated critical fluctuations have emerged as a potential candidate for the superconducting pairing in various unconventional superconductors. However, in most
Nematic Electronic Structure in the “Parent” State of the Iron-Based Superconductor Ca(Fe1–xCox)2As2
Nematic Electronic Order in Iron Superconductors The properties of many high-temperature superconductors vary strongly as the composition of a doping element changes, and at sufficient under- or
Discovery of a strain-stabilised smectic electronic order in LiFeAs
TLDR
Using low-temperature scanning tunnelling microscopy, this work image a strain-stabilized smectic electronic order in LiFeAs with both broken rotational symmetry and reduced translational symmetry, which may lead to dramatic modification in the electronic states in strong correlated materials.
Electrical resistivity across a nematic quantum critical point
TLDR
The observation of T-linear resistivity at a nematic critical point raises the question of whether strong nematic fluctuations play a part in the transport properties of other ‘strange metals’, in which T- linear resistivity is observed over an extended regime in their respective phase diagrams.
Unconventional s-Wave Superconductivity in Fe(Se,Te)
Breaking Convention The defining characteristics of a superconductor are symmetry of gap function, which tells us something about how pairs of electrons move through the sample, and the strength of
Evidence for orbital order and its relation to superconductivity in FeSe0.4Te0.6
TLDR
Evidence for nematic electronic states in the iron-chalcogenide superconductor FeSe0.4Te0.6 from quasi-particle scattering detected in spectroscopic maps is provided and the relation to superconductivity and the influence on the coherence length are discussed.
Observation of topological superconductivity on the surface of an iron-based superconductor
TLDR
The researchers found that the surface of the iron superconductor FeTe0.55Se0.45 satisfies the required conditions for topological superconductivity, providing a simple and possibly high-temperature platform for realizing Majorana states.
...
1
2
3
4
5
...