Interplay of quantum confinement and strain effects in type I to type II transition in Ge/Si core-shell nanocrystals

Autor: Marri, Ivan, Ossicini, Stefano, Amato, Michele, Grillo, Simone, Pulci, Olivia

The electronic properties of hydrogenated, spherical, Si/Ge and Ge/Si core-shell nanocrystals with a diameter ranging from 1.8 to 4.0 nm are studied within Density Functional Theory. Effects induced by quantum confinement and strain on the near-band-

Externí odkaz: http://arxiv.org/abs/2206.11058

Funzioni caratteristiche e polinomi s-ortogonali

Autor: A. OSSICINI, M.R. MARTINELLI, F. ROSATI

Publikováno v: Rendiconti di Matematica e delle Sue Applicazioni, Vol 14, Iss 2, Pp 355-366 (1994)

Two remarkable systems of s-orthogonal polynomials and their connected hyper-Gaussian quadrature formulae are considered. By method of “characteristic function” (in the complex plane), asymptotic properties for approximate estimations of integral

Externí odkaz: https://doaj.org/article/057ec7e267594c0d91da919237325e48

Carrier Multiplication in Silicon Nanocrystals: Theoretical Methodologies and Role of the Passivation

Autor: Marri, Ivan, Govoni, Marco, Ossicini, Stefano

Publikováno v: physica status solidi C 14, 1700198 (2017)

Carrier multiplication is a non-radiative recombination mechanism that leads to the generation of two or more electron-hole pairs after absorption of a single photon. By reducing the occurrence of dissipative effects, this process can be exploited to

Externí odkaz: http://arxiv.org/abs/1809.07717

Doped and Codoped Silicon Nanocrystals: the Role of Surfaces and Interfaces

Autor: Marri, Ivan, Degoli, Elena, Ossicini, Stefano

Publikováno v: Progress in Surface Science, Volume 92, Issue 4, December 2017, Pages 375-408

Si nanocrystals have been extensively studied because of their novel properties and their potential applications in electronic, optoelectronic, photovoltaic, thermoelectric and biological devices. These new properties are achieved through the combina

Externí odkaz: http://arxiv.org/abs/1807.05304

The lost proof of Fermat's last theorem

Autor: Ossicini, Andrea

Publikováno v: Mathematics 2022, Volume 10, Issue 23, 4471 by MDPI and "Journal of Ramanujan Society of Mathematics and Mathematical Sciences" Vol. 11, No. 1 (2023), pp. 177-187

This work contains two papers: the first published in 2022 and entitled "On the nature of some Euler's double equations equivalent to Fermat's last theorem" provides a marvellous proof through the so-called discordant forms of appropriate Euler's dou

Externí odkaz: http://arxiv.org/abs/1704.06335