Impact of Disorder on the Superconducting Phase Diagram in BaFe$_2$(As$_{1-x}$P$_x$)$_2$

Yuta Mizukami; Marcin Konczykowski; Kohei Matsuura; Tatsuya Watashige; Shigeru Kasahara; Yuji Matsuda; Takasada Shibauchi

doi:10.7566/JPSJ.86.083706

paper

Impact of Disorder on the Superconducting Phase Diagram in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

arXiv:1707.08670 · doi:10.7566/JPSJ.86.083706

Abstract

In many classes of unconventional superconductors, the question of whether the superconductivity is enhanced by the quantum-critical fluctuations on the verge of an ordered phase remains elusive. One of the most direct ways of addressing this issue is to investigate how the superconducting dome traces a shift of the ordered phase. Here, we study how the phase diagram of the iron-based superconductor BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$ changes with disorder via electron irradiation, which keeps the carrier concentrations intact. With increasing disorder, we find that the magneto-structural transition is suppressed, indicating that the critical concentration is shifted to the lower side. Although the superconducting transition temperature $T_{c}$ is depressed at high concentrations ( $x ≳$ 0.28), it shows an initial increase at lower $x$ . This implies that the superconducting dome tracks the shift of the antiferromagnetic phase, supporting the view of the crucial role played by quantum-critical fluctuations in enhancing superconductivity in this iron-based high- $T_{c}$ family.

arXiv comment5 pages, 4 figures

Impact of Disorder on the Superconducting Phase Diagram in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$

Abstract

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Impact of Disorder on the Superconducting Phase Diagram in BaFe2​(As1−x​Px​)2​

Abstract

References in corpus (23)

Cited by in corpus (14)

Impact of Disorder on the Superconducting Phase Diagram in BaFe $_{2}$ (As $_{1 - x}$ P $_{x}$ ) $_{2}$