Giant Linear and Nonlinear Excitonic Responses in an Atomically Thin Indirect Semiconductor Nitrogen Phosphide NP

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F21%3AA22029Q9" target="_blank" >RIV/61988987:17310/21:A22029Q9 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1021/acs.jpcc.1c02091" target="_blank" >https://doi.org/10.1021/acs.jpcc.1c02091</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.jpcc.1c02091" target="_blank" >10.1021/acs.jpcc.1c02091</a>

Result language
angličtina
Original language name
Giant Linear and Nonlinear Excitonic Responses in an Atomically Thin Indirect Semiconductor Nitrogen Phosphide NP
Original language description
Large linear and nonlinear optical responses can be obtained from two-dimensional semiconductors with an indirect electronic gap. Here we demonstrate exceptionally large exciton-driven responses such as the fundamental exciton binding energy (2 eV), zero-point band-gap renormalization (200 meV), and nonlinear second and third harmonic coefficients (800 pm/V and 1.4x10^{-18} m^2/V^2 respectively) from an atomically thin binary group-V NP semiconductor. The influence of lattice vibrations on the absorption spectra unfolds strong electronic couplings to both LA and ZO-TO phonon modes. All the linear process analyses were computed using a fully ab-initio based G0W0+Bethe-Salpeter equation approach that also includes the electron-phonon self-energies. The nonlinear processes were instead obtained using a real-time ab-initio process flow after creating a coupling between the time-dependent external electric field and the correlated electrons within the modern theory of polarization and the same electron-hole interaction level.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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