Fluctuating Ru trimer precursor to a two-stage electronic transition in RuP
| العنوان: | Fluctuating Ru trimer precursor to a two-stage electronic transition in RuP |
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| المؤلفون: | Robert J. Koch, Niraj Aryal, Oleh Ivashko, Yu Liu, Milinda Abeykoon, Eric D. Bauer, Martin v. Zimmermann, Weiguo Yin, Cedomir Petrovic, Emil S. Bozin |
| المصدر: | Physical review / B 106(21), 214516 (2022). doi:10.1103/PhysRevB.106.214516 |
| بيانات النشر: | American Physical Society (APS), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | ddc:530 |
| الوصف: | Physical review / B 106(21), 214516 (2022). doi:10.1103/PhysRevB.106.214516 Superconductivity in binary ruthenium pnictides occurs proximal to and upon suppression of a nonmagnetic ground state, preceded by a pseudogap phase associated with Fermi surface instability, and its critical temperature, $T_c$, is maximized around the pseudogap quantum critical point. By analogy with isoelectronic iron-based counterparts, antiferromagnetic fluctuations became “usual suspects” as putative mediators of superconducting pairing. Here we report on a high-temperature local symmetry breaking in RuP, the nonsuperconducting parent of the maximum-$T_c$ branch of these novel superconductors, revealed by combined nanostructure-sensitive powder and single-crystal x-ray total scattering analyses. Large local distortions of Ru chains associated with orbital-charge trimerization, further assembled into hexamers, exist above the two-stage electronic transition in RuP. In the pseudogap regime the precursors order with distortions retaining their strength, whereas they acquire spin-singlet characteristics which dramatically enhances the distortion as the nonmagnetic ground state establishes. The precursors enable the nonmagnetic ground state and presumed complex oligomerization, and the relevance of pseudogap fluctuations for superconductivity emerges as a distinct prospect. As a transition metal system in which partial d-manifold filling combined with high crystal symmetry promotes electronic instabilities, this represents a further example of local electronic precursors underpinning the macroscopic collective behavior of quantum materials. Published by Inst., Woodbury, NY |
| تدمد: | 2469-9969 2469-9950 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb97729530898322f12376152fc80a88 https://doi.org/10.1103/physrevb.106.214516 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....bb97729530898322f12376152fc80a88 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24699969 24699950 |
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