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Using low-temperature scanning tunneling microscopy and spectroscopy, we have studied the proximity effect at the interfaces between superconducting Pb island structures and metallic Pb-induced striped-incommensurate phase formed on a…

Mesoscale and Nanoscale Physics · Physics 2020-02-21 Howon Kim , Shi-Zeng Lin , Matthias J. Graf , Takeo Kato , Yukio Hasegawa

The proximity effect between a superconductor and a highly diffusive two-dimensional metal was revealed in a Scanning Tunneling Spectroscopy experiment. The in-situ elaborated samples consisted of superconducting single crystalline Pb…

Proximity effect facilitates the penetration of Cooper pairs that permits superconductivity in normal metal, offerring a promising approach to turn heterogeneous materials into superconducting and develop exceptional quantum phenomena.…

We report low-temperature transport measurements through molecules of Gd metallofullerenes between superconducting suspended electrodes. The presence and number of molecules in the 2 nm-wide gap between electrodes was determined by high…

The proximity effect is a central feature of superconducting junctions as it underlies many important applications in devices and can be exploited in the design of new systems with novel quantum functionality. Recently, exotic proximity…

Superconductivity · Physics 2012-06-11 Jungdae Kim , Victor Chua , Gregory A. Fiete , Hyoungdo Nam , A. H. MacDonald , Chih-Kang Shih

Superconducting properties change in confined geometries. Here we study the effects of strong confinement in nanosized Pb-islands on Si(111) 7x7. Small hexagonal islands with diameters less than 50 nm and a uniform height of 7 atomic layers…

Superconductivity · Physics 2017-02-14 Steffen Rolf-Pissarczyk , Jacob A. J. Burgess , Shichao Yan , Sebastian Loth

We have studied the proximity_induced superconductivity in R7xR7R19.1o Ni nanoislands by combing scanning tunnelling microscopy_spectroscopy (STM_STS) with density functional theory (DFT) calculation. Through depositing Ni onto Pb(111)…

Superconductivity · Physics 2022-01-03 Yen-Hui Lin , Sucitto Teh , Da-You Yeh , Chin-Hsuan Chen , Deng-Sung Lin , Horng-Tay Jeng , Pin-Jui Hsu

We studied the proximity effect between a superconductor (Nb) and a diluted ferromagnetic alloy (CuNi) in a bilayer geometry. We measured the local density of states on top of the ferromagnetic layer, which thickness varies on each sample,…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 L. Cretinon , A. K. Gupta , H. Sellier , F. Lefloch , M. Faure , A. Buzdin , H. Courtois

Semiconductor-superconductor hybrid nanowires are a leading material platform for the realization of Majorana zero modes. The semiconductors in previous studies are dominantly InAs or InSb. In this work, we show the induced…

We report on transport and tunneling measurements performed on ultra-thin Pb/Ag (strong coupled superconductor/normal metal) multilayers evaporated by quench condensation. The critical temperature and energy gap of the heterostructures…

Superconductivity · Physics 2011-01-12 O. Bourgeois , A. Frydman , R. C. Dynes

052<p type="texpara" tag="Body Text" et="abstract" >The superconducting proximity effect is measured in sandwiches of thin Pb films and the alkali metals Cs, Rb, K and Na. The $T_{c}$-dependence provides information about the interface…

Superconductivity · Physics 2009-11-10 D. Garrett , M. Zhang , G. Bergmann

We describe the superconducting proximity effect taking place in a contact between a noncentrosymmetric superconductor and a diffusive normal/ferromagnetic metal within the quasiclassical theory of superconductivity. By solving numerically…

Superconductivity · Physics 2012-11-26 Gaetano Annunziata , Dirk Manske , Jacob Linder

The superconducting proximity effect induces pairing correlations in metallic systems via Andreev scattering. This effect is particularly intriguing in graphene, as it enables two-dimensional superconductivity that is tunable through…

In this communication we consider generalities of the proximity effect in a contact between a conventional $s$-wave superconductor (S) nano-island and a thin film of a topological insulator (TI). A local hybridization coupling mechanism is…

Superconductivity · Physics 2021-02-17 Nicholas Sedlmayr , Alex Levchenko

We report high-resolution scanning tunneling microscopy (STM) study of nano-sized Pb islands grown on SrTiO3, where three distinct types of gaps with different energy scales are revealed. At low temperature, an enlarged superconducting gap…

Superconductivity · Physics 2019-02-28 Yonghao Yuan , Xintong Wang , Canli Song , Lili Wang , Ke He , Xucun Ma , Hong Yao , Wei Li , Qi-Kun Xue

We report the fabrication of strongly coupled nanohybrid superconducting junctions using PbS semiconductor nanowires and Pb0.5In0.5 superconducting electrodes. The maximum supercurrent in the junction reaches up to ~15 \mu A at 0.3 K, which…

Superconductivity · Physics 2020-10-06 Bum-Kyu Kim , Hong-Seok Kim , Yiming Yang , Xingyue Peng , Dong Yu , Yong-Joo Doh

We present a theory for the pseudo-gap state recently observed at the LaAlO3/SrTiO3 interface, based on superconducting islands embedded in a metallic background. Superconductivity within each island is BCS-like, and the local critical…

Superconductivity · Physics 2015-02-18 D. Bucheli , S. Caprara , M. Grilli

We theoretically explore the possibility of a superconducting proximity effect in single-walled metallic carbon nanotubes due to the presence of a superconducting substrate. An unconventional double-gap situation can arise in the two bands…

Strongly Correlated Electrons · Physics 2009-11-13 Karyn Le Hur , Smitha Vishveshwara , Cristina Bena

We consider a planar superconducting-normal-metal (SN) junction with both inelastic and spin-flip scattering processes present. In the diffusive limit, we use a one-dimensional formulation of the Usadel equation to compute the…

Superconductivity · Physics 2024-11-06 Arpit Raj , Patrick A. Lee , Gregory A. Fiete

We combine density functional theory and scanning tunneling microscopy to study the proximity effects between a bulk Ru(0001) superconductor and an atomically thin overlayer of Co. We have identified that the Co monolayer can grow in two…

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