Anomalous hysteresis as evidence for a magnetic-field-induced chiral superconducting state in LiFeAs

@article{Li2013AnomalousHA,
  title={Anomalous hysteresis as evidence for a magnetic-field-induced chiral superconducting state in LiFeAs},
  author={G. Q. Li and Ricardo Rodrigues Urbano and Pallab Goswami and Chiara Tarantini and Bing Lv and Philip L. Kuhns and Arneil P. Reyes and C. W. Chu and Luis Balicas},
  journal={Physical Review B},
  year={2013},
  volume={87},
  pages={024512}
}
Magnetometry measurements in high-quality LiFeAs single crystals reveal a change in the sign of the magnetic hysteresis in the vicinity of the upper critical field ${H}_{c2}$, from a clear diamagnetic response dominated by the pinning of vortices to a considerably smaller net hysteretic response of opposite sign, which disappears at ${H}_{c2}$. If the diamagnetic response at high fields results from pinned vortices and associated screening supercurrents, this sign change must result from… 
14 Citations

Figures from this paper

Two distinct superconducting phases in LiFeAs

TLDR
Scanning tunnelling spectroscopy data of LiFeAs reveal two distinct superconducting phases: at = 18 K a partial superconductor gap opens and at Tc = 16‬K, these features substantiate dramatically and become characteristic of full superconductivity.

Bulk evidence for a time-reversal symmetry broken superconducting state in URu2Si2

URu${}_{2}$Si${}_{2}$ is claimed to be a chiral $d$-wave superconductor with a ${k}_{z}({k}_{x}\ifmmode\pm\else\textpm\fi{}i{k}_{y})$ time-reversal symmetry broken orbital component for the Cooper

Anomalous superconducting state in LiFeAs implied by the 75As Knight shift measurement

TLDR
The Knight shift and the in situ ac susceptibility measurements as a function of temperature and external field are indicative of two superconducting transition temperatures, each of which is associated with its own upper critical field.

High field paramagnetic Meissner effect in Mo100−xRex alloy superconductors

We have performed an experimental study on the temperature and field dependence of magnetization of a series of superconducting Mo100−xRex alloys. Our studies reveal the presence of high field

Paramagnetic moments and time effects in melt-textured NdBaCuO system with Nd422 inclusions

We have performed magnetic measurements in two melt-textured NdBa2Cu3O7-δ samples with Nd422 inclusions under magnetic fields from 0.05 up to 14 T, applied parallel to the ab planes. The measurements

Defect states in LiFeAs as seen by low‐temperature scanning tunneling microscopy and spectroscopy

We present a microscopic investigation of frequently observed impurity‐induced states in stoichiometric LiFeAs using low‐temperature scanning tunneling microscopy and spectroscopy (STM/STS). Our data