Superconducting Properties in Arrays of Nanostructured β-Gallium
| Autor: | Fanny Béron, O. F. de Lima, P. G. Pagliuso, Priscila Rosa, K.O. Moura, Kleber R. Pirota, Dina Tobia, C. B. R. Jesus |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Field (physics) Ciencias Físicas Nanowire chemistry.chemical_element lcsh:Medicine 01 natural sciences Article 010305 fluids & plasmas purl.org/becyt/ford/1 [https] Magnetization Condensed Matter::Superconductivity 0103 physical sciences Phenomenological model Gallium 010306 general physics lcsh:Science Superconductivity Multidisciplinary Condensed matter physics lcsh:R purl.org/becyt/ford/1.3 [https] METALLIC-FLUX NUCLEATION Vortex Astronomía chemistry SUPERCONDUCTING NANOWIRES lcsh:Q Cooper pair CIENCIAS NATURALES Y EXACTAS BETA-Ga NANOSTRUCTURES |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET Scientific Reports Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017) |
| Popis: | Samples of nanostructured β-Ga wires were synthesized by a novel method of metallic-flux nanonucleation. Several superconducting properties were observed, revealing the stabilization of a weak-coupling type-II-like superconductor ($${T}_{c}$$ T c $$\approx $$ ≈ 6.2 K) with a Ginzburg-Landau parameter $${\kappa }_{GL}$$ κ G L = 1.18. This contrasts the type-I superconductivity observed for the majority of Ga phases, including small spheres of β-Ga with diameters near 15 μm. Remarkably, our magnetization curves reveal a crossover field $${H}_{D}$$ H D , where we propose that the Abrikosov vortices are exactly touching their neighbors inside the Ga nanowires. A phenomenological model is proposed to explain this result by assuming that only a single row of vortices is allowed inside a nanowire under perpendicular applied field, with an appreciable depletion of Cooper pair density at the nanowire edges. These results are expected to shed light on the growing area of superconductivity in nanostructured materials. |
| Databáze: | OpenAIRE |
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