The electronic phase diagram of the LaO1-xFxFeAs superconductor

Details The electronic phase diagram of the LaO1-xFxFeAs superconductor The electronic phase diagram of the LaO1-xFxFeAs superconductor

2008-06-21

arxiv.org/abs/0806.3533v2

Nature Materials Letter April 2008, published online 22 February 2008

Physics

Condensed Matter

Superconductivity

25 pages, 7 figures

Scientific paper

10.1038/nmat2397

The competition of magnetic order and superconductivity is a key element in the physics of all unconventional superconductors, e.g. in high-transition-temperature cuprates 1, heavy fermions 2 and organic superconductors3. Here superconductivity is often found close to a quantum critical point where long-range antiferromagnetic order is gradually suppressed as a function of a control parameter, e.g. charge carrier doping or pressure. It is believed that dynamic spin fluctuations associated with this quantum critical behaviour are crucial for the mechanism of superconductivity. Recently high-temperature superconductivity has been discovered in iron-pnictides providing a new class of unconventional superconductors4,5,6. Similar to other unconventional superconductors the parent compounds of the pnictides exhibit a magnetic ground state7,8 and superconductivity is induced upon charge carrier doping. In this Letter the structural and electronic phase diagram is investigated by means of x-ray scattering, MuSR and Moessbauer spectroscopy on the series LaO1-xFxFeAs. We find a discontinuous first-order-like change of the Neel temperature, the superconducting transition temperature and of the respective order parameters. Our results strongly question the relevance of quantum critical behaviour in ironpnictides and prove a strong coupling of the structural orthorhombic distortion and the magnetic order both disappearing at the phase boundary to the superconducting state.

Affiliated with

Also associated with

No associations

Rating

The electronic phase diagram of the LaO1-xFxFeAs superconductor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The electronic phase diagram of the LaO1-xFxFeAs superconductor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The electronic phase diagram of the LaO1-xFxFeAs superconductor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-620674