Optical properties of quasi-two-dimensional objects from time-dependent density functional theory: Longitudinal versus transverse dielectric functions

Autor: Stefano Mazzei, Christine Giorgetti

Publikováno v: Physical Review B
Physical Review B, 2023, 107 (16), pp.165412. ⟨10.1103/PhysRevB.107.165412⟩

International audience; Comprehension of the electronic properties of nano-objects is a key to defining dedicated properties, which can be adjusted by changing their size. Beyond confinement effects, the presence of interfaces, i.e., places where the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad9f36799e2a9a8bfe444a77e985387b
https://doi.org/10.1103/physrevb.107.165412

Structural and electronic transitions in few layers of isotopically pure hexagonal boron nitride

Autor: Bernard Gil, Hugo Henck, Fabrice Oehler, Julien Chaste, José Avila, Abdelkarim Ouerghi, Debora Pierucci, James H. Edgar, Guillaume Cassabois, Lama Khalil, Yannick J. Dappe, Jihene Zribi, Christine Giorgetti, Song Liu, Emmanuel Lhuillier

Publikováno v: Physical Review B
Physical Review B, American Physical Society, 2020, 102 (11), ⟨10.1103/PhysRevB.102.115141⟩
Physical Review B, 2020, 102 (11), ⟨10.1103/PhysRevB.102.115141⟩
Physical Review B, American Physical Society, 2020, 102 (11), ⟨10.1103/physrevb.102.115141⟩

International audience; Hexagonal boron nitride (hBN) is attracting tremendous interest as an essential component in van der Waals heterostructures due to its ability to provide weakly interacting interfaces and because of its large bandgap. Although

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba5308d0bbbb176753e5b6b1dbcfb754
https://hal.archives-ouvertes.fr/hal-02946710/document

Direct Observation of Band Gap Renormalization in Layered Indium Selenide

Autor: Abhay Shukla, Luca Perfetti, Hemian Yi, Dianyuan Fan, José Avila, Zailan Zhang, Meryem Bouaziz, Zhesheng Chen, Christine Giorgetti, Ying Li, Azzedine Bendounan, Bingbing Tian

Publikováno v: ACS Nano
ACS Nano, 2019, 13 (11), pp.13486-13491. ⟨10.1021/acsnano.9b07144⟩
ACS Nano, American Chemical Society, 2019, 13 (11), pp.13486-13491. ⟨10.1021/acsnano.9b07144⟩

Manipulation of intrinsic electronic structures by electron or hole doping in a controlled manner in van der Waals layered materials is the key to control their electrical and optical properties. Two-dimensional indium selenide (InSe) semiconductor h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14ea56dc18872eea61ea0fb1d46b3412
https://hal.science/hal-03055030

Band Gap Renormalization, Carrier Multiplication, and Stark Broadening in Photoexcited Black Phosphorus

Autor: Luca Perfetti, Zailan Zhang, Amina Taleb-Ibrahimi, Evangelos Papalazarou, Marino Marsi, Zhesheng Chen, Christine Giorgetti, Bingbing Tian, Jingwei Dong, Jean-Pascal Rueff

Publikováno v: Nano Letters
Nano Letters, 2018, 19 (1), pp.488-493. ⟨10.1021/acs.nanolett.8b04344⟩
Nano Letters, American Chemical Society, 2018, 19 (1), pp.488-493. ⟨10.1021/acs.nanolett.8b04344⟩

International audience; We investigate black phosphorus by time- and angle-resolved photoelectron spectroscopy. The electrons excited by 1.57 eV photons relax down to a conduction band minimum within 1 ps. Despite the low band gap value, no relevant

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::053b376036b13dc681d7955fe1e8a683
https://hal.science/hal-02264121

Ultrafast electron dynamics reveal the high potential of InSe for hot-carrier optoelectronics

Autor: Luca Perfetti, Evangelos Papalazarou, Christine Giorgetti, Jelena Sjakste, Valérie Véniard, Marino Marsi, Raphael Cabouat, Zailan Zhang, Jacques Peretti, Zhesheng Chen, Amina Taleb-Ibrahimi, Abhay Shukla

Publikováno v: Physical Review B: Condensed Matter and Materials Physics
Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2018, 97 (24), ⟨10.1103/PhysRevB.97.241201⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2018, 97 (24), ⟨10.1103/PhysRevB.97.241201⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2018, 97 (24), ⟨10.1103/PhysRevB.97.241201⟩

We monitor the dynamics of hot carriers in InSe by means of two-photon photoelectron spectroscopy (2PPE). The electrons excited by photons of 3.12 eV experience a manifold relaxation. First, they thermalize to electronic states degenerate with the $\

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29ad6e81ecf98bf0adfd054c7204b475
https://doi.org/10.1103/physrevb.97.241201