A Quantum Critical Point Lying Beneath the Superconducting Dome in Iron Pnictides

By T. Shibauchi, A. Carrington, Y. Matsuda. 2013

316 citations recorded by the source corpus.

Whether a quantum critical point (QCP) lies beneath the superconducting dome has been a long-standing issue that remains unresolved in many classes of unconventional superconductors, notably cuprates, heavy fermions, and, most recently, iron pnictides. The existence of a QCP may offer a route to understanding the origin of unconventional superconductors’ anomalous non-Fermi liquid properties, the microscopic coexistence between unconventional superconductivity and magnetic or some other exotic order, and, ultimately, the mechanism of superconductivity itself. The isovalent substituted iron pnictide BaFe2(As1−xPx)2 offers a new platform for the study of quantum criticality, providing a unique opportunity to study the evolution of the electronic properties in a wide range of the phase diagram. Recent experiments in BaFe2(As1−xPx)2 have provided the first clear and unambiguous evidence of a second-order quantum phase transition lying beneath the superconducting dome.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/9aeaed4d2cd11419b0e4772ea919a4fe98eedf4f

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In Condensed Matter Physics

In Electronic, Optical and Magnetic Materials

Citations in the corpus

Flat bands, strange metals and the Kondo effect (2023, unknown): “A continuous orbital-selective Mott transition is realized 214,216 , describing metallic quantum criticality where quasiparticles are expected to be lost.”
Angle-resolved photoemission studies of quantum materials (2020, unknown): “Other than antiferromagnetic spin fluctuation, nematic fluctuation is also postulated as another candidate to facilitate pairing (Lederer et al., 2015; Shibauchi et al., 2014).”
Holographic Quantum Matter (2016, background): “Moreover, strange metal behavior is also dominant near optimal doping [667], suggesting a direct connection between spin density wave or Ising-nematic criticality and the non-quasiparticle transport.”