Correlation between Fermi surface reconstruction and superconductivity in pressurized FeTe0.55Se0.45

@article{Lin2020CorrelationBF,
  title={Correlation between Fermi surface reconstruction and superconductivity in pressurized 
FeTe0.55Se0.45},
  author={Gongchang Lin and Jing Guo and Yanglin Zhu and Shu Cai and Yazhou Zhou and Cheng Huang and Chongli Yang and Sijin Long and Qi Wu and Zhiqiang Mao and Tao Xiang and Liling Sun},
  journal={Physical Review B},
  year={2020},
  volume={101},
  pages={214525}
}
  • G. Lin, Jing Guo, +9 authors Liling Sun
  • Published 2 April 2020
  • Physics
  • Physical Review B
Here we report the results of the high-pressure Hall coefficient (${R}_{H}$) measurements, combined with the high-pressure resistance measurements, at different temperatures on the putative topological superconductor ${\mathrm{FeTe}}_{0.55}{\mathrm{Se}}_{0.45}$. We find the intimate correlation of sign change of ${R}_{H}$, a fingerprint to manifest the reconstruction of Fermi surface, with structural phase transition and superconductivity. Below the critical pressure (${P}_{\mathrm{c}}$) of 2.7… 

Figures from this paper

References

SHOWING 1-10 OF 46 REFERENCES
Crossover from two-dimensional to three-dimensional superconducting states in bismuth-based cuprate superconductor
To decipher the mechanism of high-temperature superconductivity, it is important to know how the superconducting pairing emerges from the unusual normal states of cuprate superconductors 1 – 4 ,
Evidence for Superconductivity above 260 K in Lanthanum Superhydride at Megabar Pressures.
TLDR
It is suggested that the transitions represent signatures of superconductivity to near room temperature in phases of lanthanum superhydride, in good agreement with density functional structure search and BCS theory calculations.
Superconductivity at 250 K in lanthanum hydride under high pressures
TLDR
A lanthanum hydride compound at a pressure of around 170 gigapascals is found to exhibit superconductivity with a critical temperature of 250 kelvin, the highest critical temperature that has been confirmed so far in a superconducting material.
Evidence for Majorana bound states in an iron-based superconductor
TLDR
A sharp zero-bias peak inside a vortex core that does not split when moving away from the vortex center is observed, consistent with the tunneling to a nearly pure MBS, separated from nontopological bound states.
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.
#p
High-T_{c} Superconductivity in FeSe at High Pressure: Dominant Hole Carriers and Enhanced Spin Fluctuations.
The importance of electron-hole interband interactions is widely acknowledged for iron-pnictide superconductors with high transition temperatures (T_{c}). However, the absence of hole pockets near
Tetradymites as thermoelectrics and topological insulators
Tetradymite-type materials, such as Bi2Te3, have for decades been of interest as excellent thermoelectrics near ambient temperature and have recently enabled many seminal studies on topological
Tuning electronic properties of FeSe 0.5 Te 0.5 thin flakes using a solid ion conductor field-effect transistor
Using a field-effect transistor (FET) configuration with solid Li-ion conductor (SIC) as gate dielectric, we have successfully tuned carrier density in FeSe$_{0.5}$Te$_{0.5}$ thin flakes, and the
...
1
2
3
4
5
...