Nematic transitions in iron pnictide superconductors imaged with a quantum gas

@article{Yang2020NematicTI,
  title={Nematic transitions in iron pnictide superconductors imaged with a quantum gas},
  author={Fan Yang and Stephen F. Taylor and Stephen D. Edkins and Johanna C. Palmstrom and Ian R. Fisher and Benjamin L. Lev},
  journal={Nature Physics},
  year={2020},
  volume={16},
  pages={514-519}
}
The Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) uses an atomic Bose–Einstein condensate to measure magnetic fields emanating from solid-state samples. The quantum sensor does so with unprecedented d.c. sensitivity at micrometre resolution, from room to cryogenic temperatures 1 . An additional advantage of the SQCRAMscope is the preservation of optical access to the sample so that magnetometry imaging of, for example, electron transport may be performed in concert with other imaging… 
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References

SHOWING 1-10 OF 42 REFERENCES
Scanning Quantum Cryogenic Atom Microscope
Microscopic imaging of local magnetic fields provides a window into the organizing principles of complex and technologically relevant condensed matter materials. However, a wide variety of intriguing
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.
Electronic nematicity above the structural and superconducting transition in BaFe2(As1−xPx)2
Electronic nematicity, a unidirectional self-organized state that breaks the rotational symmetry of the underlying lattice, has been observed in the iron pnictide and copper oxide high-temperature
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
Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
We investigate how emergent nematic order and nematic fluctuations affect several macroscopic properties of both the normal and superconducting states of the iron pnictides. Due to its magnetic
Surface nematic order in iron pnictides
Electronic nematicity plays an important role in iron-based superconductors. These materials have a layered structure and the theoretical description of their magnetic and nematic transitions has
Emergence of Orbital Nematicity in the Tetragonal Phase of BaFe2(As1−xPx)2
We report on 75As-NMR measurements in single crystalline BaFe2(As0.96P0.04)2 for magnetic fields parallel to the orthorhombic [110]o and [100]o directions above the structural transition temperature
Imaging Anomalous Nematic Order and Strain in Optimally Doped BaFe_{2}(As,P)_{2}.
TLDR
The results indicate that nematic order arises in a genuine phase transition rather than by enhancement of local anisotropy by a strong nematic susceptibility.
Intra-unit-cell electronic nematicity of the high-Tc copper-oxide pseudogap states
TLDR
The determination of a quantitative order parameter representing intra-unit-cell nematicity: the breaking of rotational symmetry by the electronic structure within each CuO2 unit cell is reported.
Nematic Fermi Fluids in Condensed Matter Physics
Correlated electron fluids can exhibit a startling array of complex phases, among which one of the more surprising is the electron nematic, a translationally invariant metallic phase with a
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