Zobrazeno 1 - 10
of 197
pro vyhledávání: '"Rontani, Massimo"'
Autor:
Guandalini, Alberto, Leon, Dario A., D'Amico, Pino, Cardoso, Claudia, Ferretti, Andrea, Rontani, Massimo, Varsano, Daniele
The GW self-energy may become computationally challenging to evaluate because of frequency and momentum convolutions. These difficulties were recently addressed by the development of the multipole approximation (MPA) and the W-av methods: MPA accurat
Externí odkaz:
http://arxiv.org/abs/2304.10810
The screening of Coulomb interaction controls many-body physics in carbon nanotubes, as it tunes the range and strength of the force that acts on charge carriers and binds electron-hole pairs into excitons. In doped tubes, the effective Coulomb inter
Externí odkaz:
http://arxiv.org/abs/2201.10199
Autor:
Montanaro, Angela, Giusti, Francesca, Zanfrognini, Matteo, Di Pietro, Paola, Glerean, Filippo, Jarc, Giacomo, Rigoni, Enrico Maria, Mathengattil, Shahla Y., Varsano, Daniele, Rontani, Massimo, Perucchi, Andrea, Molinari, Elisa, Fausti, Daniele
The competition between the electron-hole Coulomb attraction and the three-dimensional dielectric screening dictates the optical properties of layered semiconductors. In low-dimensional materials, the equilibrium dielectric environment can be signifi
Externí odkaz:
http://arxiv.org/abs/2111.12355
Autor:
Sun, Bosong, Zhao, Wenjin, Palomaki, Tauno, Fei, Zaiyao, Runburg, Elliott, Malinowski, Paul, Huang, Xiong, Cenker, John, Cui, Yong-Tao, Chu, Jiun-Haw, Xu, Xiaodong, Ataei, S. Samaneh, Varsano, Daniele, Palummo, Maurizia, Molinari, Elisa, Rontani, Massimo, Cobden, David H.
A single monolayer of the layered semimetal WTe2 behaves as a two-dimensional topological insulator, with helical conducting edge modes surrounding a bulk state that becomes insulating at low temperatures. Here we present evidence that the bulk state
Externí odkaz:
http://arxiv.org/abs/2110.14104
Publikováno v:
PNAS vol. 118 no. 13 e2010110118 (2021)
Spontaneous condensation of excitons is a long sought phenomenon analogous to the condensation of Cooper pairs in a superconductor. It is expected to occur in a semiconductor at thermodynamic equilibrium if the binding energy of the excitons---electr
Externí odkaz:
http://arxiv.org/abs/2011.02380
Publikováno v:
This is a pre-print of an article published in Nature Nanotechnology (2020)
Monolayer transition metal dichalcogenides in the T' phase promise to realize the quantum spin Hall (QSH) effect at room temperature, because they exhibit a prominent spin-orbit gap between inverted bands in the bulk. Here we show that the binding en
Externí odkaz:
http://arxiv.org/abs/1906.07971
Autor:
Island, Joshua O., Ostermann, Marvin, Aspitarte, Lee, Minot, Ethan D., Varsano, Daniele, Molinari, Elisa, Rontani, Massimo, Steele, Gary A.
Publikováno v:
Phys. Rev. Lett. 121, 127704 (2018)
Carbon nanotubes continue to be model systems for studies of confinement and interactions. This is particularly true in the case of so-called "ultra-clean" carbon nanotube devices offering the study of quantum dots with extremely low disorder. The qu
Externí odkaz:
http://arxiv.org/abs/1809.08347
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2021 Mar . 118(13), 1-11.
Externí odkaz:
https://www.jstor.org/stable/27039748
Autor:
Varsano, Daniele, Sorella, Sandro, Sangalli, Davide, Barborini, Matteo, Corni, Stefano, Molinari, Elisa, Rontani, Massimo
Publikováno v:
Nature Communications 8, 1461 (2017)
Fifty years ago Walter Kohn speculated that a zero-gap semiconductor might be unstable against the spontaneous generation of excitons---electron-hole pairs bound together by Coulomb attraction. The reconstructed ground state would then open a gap bre
Externí odkaz:
http://arxiv.org/abs/1703.09235
Autor:
Aspitarte, Lee, McCulley, Daniel R., Bertoni, Andrea, Island, Joshua O., Ostermann, Marvin, Rontani, Massimo, Steele, Gary A., Minot, Ethan D.
Publikováno v:
Scientific Reports 7, 8828 (2017)
Carbon nanotubes (CNTs) are a promising material for high-performance electronics beyond silicon. But unlike silicon, the nature of the transport band gap in CNTs is not fully understood. The transport gap in CNTs is predicted to be strongly driven b
Externí odkaz:
http://arxiv.org/abs/1610.08998