تقرير
Tuning metal/superconductor to insulator/superconductor coupling via control of proximity enhancement between NbSe$_2$ monolayers
| العنوان: | Tuning metal/superconductor to insulator/superconductor coupling via control of proximity enhancement between NbSe$_2$ monolayers |
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| المؤلفون: | Chiatti, Olivio, Mihov, Klara, Griffin, Theodor U., Grosse, Corinna, Alemayehu, Matti B., Hite, Kyle, Hamann, Danielle, Mogilatenko, Anna, Johnson, David C., Fischer, Saskia F. |
| المصدر: | J. Phys.: Condens. Matter 35 (2023) 215701 |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | The interplay between charge transfer and electronic disorder in transition-metal dichalcogenide multilayers gives rise to superconductive coupling driven by proximity enhancement, tunneling and superconducting fluctuations, of a yet unwieldy variety. Artificial spacer layers introduced with atomic precision change the density of states by charge transfer. Here, we tune the superconductive coupling between NbSe$_2$ monolayers from proximity-enhanced to tunneling-dominated. We correlate normal and superconducting properties in [(SnSe)$_{1+{\delta}}$]$_m$[NbSe$_2$]$_1$ tailored multilayers with varying SnSe layer thickness. From high-field magnetotransport the critical fields yield Ginzburg-Landau coherence lengths with an increase of 140 % cross-plane , trending towards two-dimensional superconductivity for m > 9. We show cross-over between three regimes: metallic with proximity-enhanced coupling, disordered-metallic with intermediate coupling and insulating with Josephson tunneling. Our results demonstrate that stacking metal mono- and dichalcogenides allows to convert a metal/superconductor into an insulator/superconductor system, prospecting the control of two-dimensional superconductivity in embedded layers. Comment: Revised version submitted to Journal of Physics: Condensed Matter |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/1361-648X/acbf92 |
| الوصول الحر: | http://arxiv.org/abs/2212.01084Test |
| رقم الانضمام: | edsarx.2212.01084 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/1361-648X/acbf92 |
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