Vertical Growth of Superconducting Crystalline Hollow Nanowires by He+ Focused Ion Beam Induced Deposition

Córdoba, R. ; Ibarra, A. (Universidad de Zaragoza) ; Mailly, D. ; De Teresa, J.M. (Universidad de Zaragoza)

Resumen: Novel physical properties appear when the size of a superconductor is reduced to the nanoscale, in the range of its superconducting coherence length (¿0). Such nanosuperconductors are being investigated for potential applications in nanoelectronics and quantum computing. The design of three-dimensional nanosuperconductors allows one to conceive novel schemes for such applications. Here, we report for the first time the use of a He+ focused-ion-beam-microscope in combination with the W(CO)6 precursor to grow three-dimensional superconducting hollow nanowires as small as 32 nm in diameter and with an aspect ratio (length/diameter) of as much as 200. Such extreme resolution is achieved by using a small He+ beam spot of 1 nm for the growth of the nanowires. As shown by transmission electron microscopy, they display grains of large size fitting with face-centered cubic WC1-x phase. The nanowires, which are grown vertically to the substrate, are felled on the substrate by means of a nanomanipulator for their electrical characterization. They become superconducting at 6.4 K and show large critical magnetic field and critical current density resulting from their quasi-one-dimensional superconducting character. These results pave the way for future nanoelectronic devices based on three-dimensional nanosuperconductors.

Idioma: Inglés

DOI: 10.1021/acs.nanolett.7b05103

Año: 2018

Publicado en: Nano Letters 18, 2 (2018), 1379-1386
ISSN: 1530-6984

Factor impacto JCR: 12.279 (2018)

Categ. JCR: CHEMISTRY, PHYSICAL rank: 10 / 148 = 0.068 (2018) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 19 / 293 = 0.065 (2018) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 10 / 94 = 0.106 (2018) - Q1 - T1
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 8 / 68 = 0.118 (2018) - Q1 - T1
Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 16 / 172 = 0.093 (2018) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 9 / 148 = 0.061 (2018) - Q1 - T1

Factor impacto SCIMAGO: 6.211 - Bioengineering (Q1) - Chemistry (miscellaneous) (Q1) - Nanoscience and Nanotechnology (Q1) - Materials Science (miscellaneous) (Q1) - Mechanical Engineering (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/ES/DGA/E81
Financiación: info:eu-repo/grantAgreement/EC/H2020/654360/EU/NANOSCIENCE FOUNDRIES AND FINE ANALYSIS - EUROPE/NFFA-Europe
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-51982-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-51982-C2-2-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)