دورية أكاديمية
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Nanoscale Superconducting States in the Fe-Based Filamentary Superconductor of Pr-Doped CaFe 2 As 2 .

التفاصيل البيبلوغرافية
العنوان: Nanoscale Superconducting States in the Fe-Based Filamentary Superconductor of Pr-Doped CaFe 2 As 2 .
المؤلفون: Nguyen GD; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Fu M; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.; Department of Physics, Nanchang University, Nanchang 330031, China., Zou Q; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Sanjeewa LD; Materials Science & Technology Division Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Li AP; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Sefat AS; Materials Science & Technology Division Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA., Gai Z; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
المصدر: Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2021 Apr 16; Vol. 11 (4). Date of Electronic Publication: 2021 Apr 16.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: MDPI AG Country of Publication: Switzerland NLM ID: 101610216 Publication Model: Electronic Cited Medium: Print ISSN: 2079-4991 (Print) Linking ISSN: 20794991 NLM ISO Abbreviation: Nanomaterials (Basel) Subsets: PubMed not MEDLINE
أسماء مطبوعة: Original Publication: Basel, Switzerland : MDPI AG, [2011]-
مستخلص: The low-temperature scanning tunneling microscope and spectroscopy (STM/STS) are used to visualize superconducting states in the cleaved single crystal of 9% praseodymium-doped CaFe 2 As 2 (Pr-Ca122) with T c ≈ 30 K. The spectroscopy shows strong spatial variations in the density of states (DOS), and the superconducting map constructed from spectroscopy discloses a localized superconducting phase, as small as a single unit cell. The comparison of the spectra taken at 4.2 K and 22 K (below vs. close to the bulk superconducting transition temperature) from the exact same area confirms the superconducting behavior. Nanoscale superconducting states have been found near Pr dopants, which can be identified using dI/dV conductance maps at +300 mV. There is no correlation of the local superconductivity to the surface reconstruction domain and surface defects, which reflects its intrinsic bulk behavior. We, therefore, suggest that the local strain of Pr dopants is competing with defects induced local magnetic moments; this competition is responsible for the local superconducting states observed in this Fe-based filamentary superconductor.
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فهرسة مساهمة: Keywords: defects; domain boundary; filamentary superconductor; iron-based superconductor; nanoscale superconducting states; scanning probe microscopy
تواريخ الأحداث: Date Created: 20210430 Latest Revision: 20210502
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC8074043
DOI: 10.3390/nano11041019
PMID: 33923517
قاعدة البيانات: MEDLINE
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