Persistence of slow fluctuations in the overdoped regime of Ba(Fe&lt;sub&gt;1-x&lt;/sub&gt;Rh&lt;sub&gt;x&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;As&lt;sub&gt;2&lt;/sub&gt; superconductors

Bossoni, L.; Moroni, M.; Julien, M.-H.; Canfield, Paul C.; Mayaffre, H.; Reyes, A. P.; Halperin, W. P.; Carretta, P.

doi:10.2172/1326829

Cited by 2 publications

(2 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…39 The successive steep decrease upon further cooling suggests instead a progressive slowing down of spin fluctuations, associated to a short-range diffusive dynamics in the MHz range, involving wall motions of nematic domains. 40,41 Since such a slow dynamics cannot be captured by faster techniques such as μSR, a much less pronounced peak is observed in the ZF-μSR relaxation rates (see Fig. 2b).…”

Section: Nmr Relaxation Rates and Af Spin Fluctuationsmentioning

confidence: 99%

Nodal-to-nodeless superconducting order parameter in LaFeAs1−xP x O synthesized under high pressure

et al. 2018

View full text Add to dashboard Cite

Similar to chemical doping, pressure produces and stabilizes new phases of known materials, whose properties may differ greatly from those of their standard counterparts. Here, by considering a series of LaFeAs 1−x P x O iron-pnictides synthesized under highpressure high-temperature conditions, we investigate the simultaneous effects of pressure and isoelectronic doping in the 1111 family. Results of numerous macroscopic and microscopic technique measurements unambiguously show a radically different phase diagram for the pressure-grown materials, characterized by the lack of magnetic order and the persistence of superconductivity across the whole 0.3 ≤ x ≤ 0.7 doping range. This unexpected scenario is accompanied by a branching in the electronic properties across x = 0.5, involving both the normal and superconducting phases. Most notably, the superconducting order parameter evolves from nodal (for x < 0.5) to nodeless (for x ≥ 0.5), in clear contrast to other 1111 and 122 iron-based materials grown under ambient-pressure conditions.

show abstract

Section: Nmr Relaxation Rates and Af Spin Fluctuationsmentioning

confidence: 99%

Nodal-to-nodeless superconducting order parameter in LaFeAs1−xP x O synthesized under high pressure

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The substantial increase of (T 1 T ) −1 upon lowering the temperature indicates an increase in the dynamical susceptibility, typical of a magnetic instability and/or spin fluctuations 39 . The successive steep decrease upon further cooling suggests instead a progressive slowing down of spin fluctuations, associated to a short-range diffusive dynamics in the MHz range, involving wall motions of nematic domains 40,41 . Since such a slow dynamics cannot be captured by faster techniques such as µSR, a much less pronounced peak is observed in the ZF-µSR relaxation rates (see Fig.…”

Section: Resultsmentioning

confidence: 99%

Nodal-to-nodeless superconducting order parameter in LaFeAs$_{1-x}$P$_x$O synthesized under high pressure

Shiroka,

Barbero,

Khasanov

et al. 2018

Preprint

View full text Add to dashboard Cite

Similar to chemical doping, pressure produces and stabilizes new phases of known materials, whose properties may differ greatly from those of their standard counterparts. Here, by considering a series of LaFeAs 1−x P x O iron-pnictides synthesized under high-pressure high-temperature conditions, we investigate the simultaneous effects of pressure and isoelectronic doping in the 1111 family. Results of numerous macroand microscopic technique measurements, unambiguously show a radically different phase diagram for the pressure-grown materials, characterized by the lack of magnetic order and the persistence of superconductivity across the whole 0.3 ≤ x ≤ 0.7 doping range. This unexpected scenario is accompanied by a branching in the electronic properties across x = 0.5, involving both the normal and superconducting phases. Most notably, the superconducting order parameter evolves from nodal (for x < 0.5) to nodeless (for x ≥ 0.5), in clear contrast to other 1111 and 122 iron-based materials grown under ambient-pressure conditions.

show abstract

Persistence of slow fluctuations in the overdoped regime of Ba(Fe<sub>1-x</sub>Rh<sub>x</sub>)<sub>2</sub>As<sub>2</sub> superconductors

Cited by 2 publications

References 55 publications

Nodal-to-nodeless superconducting order parameter in LaFeAs1−xP x O synthesized under high pressure

Nodal-to-nodeless superconducting order parameter in LaFeAs1−xP x O synthesized under high pressure

Nodal-to-nodeless superconducting order parameter in LaFeAs$_{1-x}$P$_x$O synthesized under high pressure

Contact Info

Product

Resources

About