Quantum corrections to the phase diagram of heavy-fermion superconductors

Details Quantum corrections to the phase diagram of heavy-fermion superconductors Quantum corrections to the phase diagram of heavy-fermion superconductors

2005-03-07

arxiv.org/abs/cond-mat/0503145v1

Phys. Rev. B 70, 174507 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 6 figures

Scientific paper

10.1103/PhysRevB.70.174507

The competition between magnetism and Kondo effect is the main effect determining the phase diagram of heavy fermion systems. It gives rise to a quantum critical point which governs the low temperature properties of these materials. However, experimental results made it clear that a fundamental ingredient is missing in this description, namely superconductivity. In this paper we make a step forward in the direction of incorporating superconductivity and study the mutual effects of this phase and antiferromagnetism in the phase diagram of heavy fermion metals. Our approach is based on a Ginzburg-Landau theory describing superconductivity and antiferromagnetism in a metal with quantum corrections taken into account through an effective potential. The proximity of an antiferromagnetic instability extends the region of superconductivity in the phase diagram and drives this transition into a first order one. On the other hand superconducting quantum fluctuations near a metallic antiferromagnetic quantum critical point gives rise to a first order transition from a low moment to a high moment state in the antiferromagnet. Antiferromagnetism and superconductivity may both collapse at a quantum bicritical point whose properties we calculate.

Affiliated with

Also associated with

No associations

Rating

Quantum corrections to the phase diagram of heavy-fermion superconductors 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 Quantum corrections to the phase diagram of heavy-fermion superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum corrections to the phase diagram of heavy-fermion superconductors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-557343