Dr. Matteo Salvato

University of Rome Tor Vergata, Rome, Italy

Dr. Matteo Salvato

University of Rome Tor Vergata, Rome, Italy

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Academic Career Length

32Years (1995-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 November 2004 in Superconductor Science and Technology

Journal Article

Interface transparency and proximity effect in Nb/Cu triple layers realized by sputtering and molecular beam epitaxy

A Tesauro

A Aurigemma

C Cirillo

Serghej Prischepa

Matteo Salvato

Carmine Attanasio

19 February 2024 in Photonics

Journal Article

Solid-State Color Centers for Single-Photon Generation

+34

Single-photon sources are important for integrated photonics and quantum technologies, and can be used in quantum key distribution, quantum computing, and sensing. Color centers in the solid state are a promising candidate for the development of the next generation of single-photon sources integrated in quantum photonics devices. They are point defects in a crystal lattice that absorb and emit light at given wavelengths and can emit single photons with high efficiency. The landscape of color centers has changed abruptly in recent years, with the identification of a wider set of color centers and the emergence of new solid-state platforms for room-temperature single-photon generation. This review discusses the emerging material platforms hosting single-photon-emitting color centers, with an emphasis on their potential for the development of integrated optical circuits for quantum photonics.

26 September 2017 in Nanotechnology

Journal Article

Single walled carbon nanotube/Si heterojunctions for high responsivity photodetectors

Matteo Salvato

M Scagliotti

Maurizio De Crescenzi

Michele Crivellari

P Prosposito

P Castrucci

Single walled carbon nanotube/n-Si (SWCNT/n-Si) hetero-junctions have been obtained by depositing SWCNT ultra-thin films on the surface of an n-Si substrate by dry transfer method. The as obtained junctions are photo sensitive in the measured wavelength range (300–1000 nm) and show zero bias responsivity and detectivity values of the order of 1 A W ⁻¹ and 10 ¹⁴ Jones respectively, which are higher than those previously observed in carbon based devices. Moreover, under on–off light excitation, the junctions show response speed as fast as 1 μ s or better and noise equivalent powers comparable to commercial Si photomultipliers. Current–voltage measurements in dark and under illumination suggest that the devices consist of Schottky and semiconductor/semiconductor junctions both contributing to the fast and high responses observed.

20 November 2020 in Journal of Applied Physics

Journal Article

Topological insulator nanoribbon Josephson junctions: Evidence for size effects in transport properties

Ananthu P. Surendran

Dmitry Golubev

We have used

{Bi}_{2} {Se}_{3}

nanoribbons, grown by catalyst-free physical vapor deposition to fabricate high quality Josephson junctions with Al superconducting electrodes. In our devices, we observe a pronounced reduction of the Josephson critical current density

J_{c}

by reducing the width of the junction, which in our case corresponds to the width of the nanoribbon. Because the topological surface states extend over the entire circumference of the nanoribbon, the superconducting transport associated with them is carried by modes on both the top and bottom surfaces of the nanoribbon. We show that the

J_{c}

reduction as a function of the nanoribbon width can be accounted for by assuming that only the modes traveling on the top surface contribute to the Josephson transport as we derive by geometrical consideration. This finding is of great relevance for topological quantum circuitry schemes since it indicates that the Josephson current is mainly carried by the topological surface states.

26 May 2020 in Nanoscale

Journal Article

Stoichiometric Bi ₂ Se ₃ topological insulator ultra-thin films obtained through a new fabrication process for optoelectronic applications

Matteo Salvato

Mattia Scagliotti

Maurizio De Crescenzi

Paola Castrucci

Fabio De Matteis

Floriana Lombardi

Stoichiometric TI Bi ₂ Se ₃ ultra-thin films suitable for infra-red optoelectronic applications are obtained from the by-products of nanowires/nanobelts. Tunnelling spectroscopy gives the position of the Fermi level inside the energy bandgap.

16 March 2015 in Applied Physics Letters

Journal Article

Hybrid superconducting neutron detectors

M. Cirillo

A. Pietropaolo

A neutron detection concept is presented that is based on superconductive niobium (Nb) strips coated by a boron (B) layer. The working principle of the detector relies on the nuclear reaction, ¹⁰B + n → α + ⁷Li, with

α

and Li ions generating a hot spot on the current-biased Nb strip which in turn induces a superconducting-normal state transition. The latter is recognized as a voltage signal which is the evidence of the incident neutron. The above described detection principle has been experimentally assessed and verified by irradiating the samples with a pulsed neutron beam at the ISIS spallation neutron source (UK). It is found that the boron coated superconducting strips, kept at a temperature T = 8 K and current-biased below the critical current I_c, are driven into the normal state upon thermal neutron irradiation. As a result of the transition, voltage pulses in excess of 40 mV are measured while the bias current can be properly modulated to bring the strip back to the superconducting state, thus resetting the detector. Measurements on the counting rate of the device are presented and the basic physical features of the detector are discussed.

About Me

Matteo Salvato graduated from University of Napoli “Federico II” in 1992 and soon after started his research activity in the field of condensed matter physics at the Physics Department of University of Salerno, working on the first Molecular Beam Epitaxy (MBE) laboratory for superconducting thin films in Italy. Together with his group, he was the first in Italy to synthesize superconducting BSCCO and YBCO thin films by MBE, eventually assisted by an ozone source that he assembled. In the same period, he was also responsible for the Morphological and Structural Analysis Laboratory in the same department, consisting of x-ray diffraction, scanning electron microscopy, energy and wavelength dispersive spectroscopy, and electron backscattering diffraction. In 2005, he moved to University of Roma Tor Vergata, where he continued his activity in the field of low temperature physics but expanded his interests toward new emerging materials following the discovery of graphene. He studied the transport properties of graphene and carbon nanotubes and their application as solar cells and photodetectors. More recently, topological insulators have attracted his interest for their possible application in nanoelectronics as well as for their electronic properties related to their surface structure. During his research activity, he collaborated with national and international laboratories and research centers both in superconductivity and nanomaterials.

Dr. Matteo Salvato

Dr. Matteo Salvato

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Representative Publications

About Me