Josephson junction arrays on the basis of superconducting PtSi films

Baturina, T. I.; Horsell, D. W.; Islamov, Damir R.; Drebushchak, I.V.; Tsaplin, Yu.A.; Babenko, A. A.; Kvon, Z.D.; Savchenko, A. K.; Plotnikov, A. E.

doi:10.1016/s0921-4526(02)02631-5

Cited by 13 publications

(9 citation statements)

References 2 publications

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“…Thin film studies on Pt layers on Si substrates show that PtSi forms at annealing temperatures above 600 °C via Si diffusion into the preformed Pt 2 Si phase, which has a body-centered tetragonal unit cell (space group I 4/ mmm ) [29]. PtSi thin films become superconducting below T c = 0.56 K [30]. A second Pt–Si phase of relevance for the present discussion is Pt 2 Si 3 , which is metastable and was found to form by annealing PtSi thin films of typically 30 nm thickness after Xe + ion bombardment at 300 keV (integrated flux 1 × 10 15 cm −2 ) [31].…”

Section: Reviewmentioning

confidence: 99%

Focused electron beam induced deposition: A perspective

Huth

Porrati²,

Schwalb³

et al. 2012

Beilstein J. Nanotechnol.

243

303

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Summary Background: Focused electron beam induced deposition (FEBID) is a direct-writing technique with nanometer resolution, which has received strongly increasing attention within the last decade. In FEBID a precursor previously adsorbed on a substrate surface is dissociated in the focus of an electron beam. After 20 years of continuous development FEBID has reached a stage at which this technique is now particularly attractive for several areas in both, basic and applied research. The present topical review addresses selected examples that highlight this development in the areas of charge-transport regimes in nanogranular metals close to an insulator-to-metal transition, the use of these materials for strain- and magnetic-field sensing, and the prospect of extending FEBID to multicomponent systems, such as binary alloys and intermetallic compounds with cooperative ground states. Results: After a brief introduction to the technique, recent work concerning FEBID of Pt–Si alloys and (hard-magnetic) Co–Pt intermetallic compounds on the nanometer scale is reviewed. The growth process in the presence of two precursors, whose flux is independently controlled, is analyzed within a continuum model of FEBID that employs rate equations. Predictions are made for the tunability of the composition of the Co–Pt system by simply changing the dwell time of the electron beam during the writing process. The charge-transport regimes of nanogranular metals are reviewed next with a focus on recent theoretical advancements in the field. As a case study the transport properties of Pt–C nanogranular FEBID structures are discussed. It is shown that by means of a post-growth electron-irradiation treatment the electronic intergrain-coupling strength can be continuously tuned over a wide range. This provides unique access to the transport properties of this material close to the insulator-to-metal transition. In the last part of the review, recent developments in mechanical strain-sensing and the detection of small, inhomogeneous magnetic fields by employing nanogranular FEBID structures are highlighted. Conclusion: FEBID has now reached a state of maturity that allows a shift of the focus towards the development of new application fields, be it in basic research or applied. This is shown for selected examples in the present review. At the same time, when seen from a broader perspective, FEBID still has to live up to the original idea of providing a tool for electron-controlled chemistry on the nanometer scale. This has to be understood in the sense that, by providing a suitable environment during the FEBID process, the outcome of the electron-induced reactions can be steered in a controlled way towards yielding the desired composition of the products. The development of a FEBID-specialized surface chemistry is mostly still in its infancy. Next to application development, it is this aspect that will likely be a guiding light for the future development of the field of focused electron beam induced deposition.

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Section: Reviewmentioning

confidence: 99%

Focused electron beam induced deposition: A perspective

Huth

Porrati²,

Schwalb³

et al. 2012

Beilstein J. Nanotechnol.

243

303

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“…In particular, a JJ array on a honeycomb lattice with f = 1/2, should display interesting resistive behavior. As a model of phase fluctuations, it should be relevant to ultra-thin superconducting films with a periodic pattern of nanoholes 20,21 , which can be regarded as a lattice of pinning centers. While for a square lattice of nanoholes, the magnetoresistance oscillates with the applied field, displaying secondary minima at f = 1/2 as for a square JJ array 20 , for a triangular lattice 21 it shows only minima at integer flux quantum per lattice unit cell.…”

Section: Introductionmentioning

confidence: 99%

Resistive transition in frustrated Josephson-junction arrays on a honeycomb lattice

Granato¹

2013

Phys. Rev. B

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We use driven Monte Carlo dynamics to study the resistive behavior of superconducting Josephson junction arrays on a honeycomb lattice in a magnetic field corresponding to f flux quantum per plaquette. While for f = 1/3 the onset of zero resistance is found at nonzero temperature, for f = 1/2 the results are consistent with a transition scenario where the critical temperature vanishes and the linear resistivity shows thermally activated behavior. We determine the thermal critical exponent of the zero-temperature transition for f = 1/2, from a dynamic scaling analysis of the nonlinear resistivity. The resistive behavior agrees with recent results obtained for the phase-coherence transition from correlation length calculations and with experimental observations on ultra-thin superconducting films with a triangular pattern of nanoholes.

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“…This contrasts the previous results on the less disordered perforated films with k F l ) 1 (see, for example, Refs. [13][14][15]), where the oscillations were seen near T c only.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 97%