Zobrazeno 1 - 10
of 201
pro vyhledávání: '"Yaffe, Omer"'
Autor:
Fabini, Douglas H., Honasoge, Kedar, Cohen, Adi, Bette, Sebastian, McCall, Kyle M., Stoumpos, Constantinos C., Klenner, Steffen, Zipkat, Mirjam, Hoang, Le Phuong, Nuss, Jürgen, Kremer, Reinhard K., Kanatzidis, Mercouri G., Yaffe, Omer, Kaiser, Stefan, Lotsch, Bettina V.
Polar and chiral crystal symmetries confer a variety of potentially useful functionalities upon solids by coupling otherwise noninteracting mechanical, electronic, optical, and magnetic degrees of freedom. We describe two unstudied phases of the 3D p
Externí odkaz:
http://arxiv.org/abs/2401.07978
Autor:
Caicedo-Dávila, Sebastián, Cohen, Adi, Motti, Silvia G., Isobe, Masahiko, McCall, Kyle M., Grumet, Manuel, Kovalenko, Maksym V., Yaffe, Omer, Herz, Laura M., Fabini, Douglas H., Egger, David A.
Metal halide perovskites have shown great performance as solar energy materials, but their outstanding optoelectronic properties are paired with unusually strong anharmonic effects. It has been proposed that this intriguing combination of properties
Externí odkaz:
http://arxiv.org/abs/2310.03408
Autor:
Seidl, Stefan A., Zhu, Xiangzhou, Reuveni, Guy, Aharon, Sigalit, Gehrmann, Christian, Caicedo-Dávila, Sebastián, Yaffe, Omer, Egger, David A.
We determine the impact of anharmonic thermal vibrations on the fundamental band gap of CsPbBr$_3$, a prototypical model system for the broader class of halide perovskite semiconductors. Through first-principles molecular dynamics and stochastic calc
Externí odkaz:
http://arxiv.org/abs/2303.01603
Autor:
Reuveni, Guy, Diskin-Posner, Yael, Gehrmann, Christian, Godse, Shravan, Gkikas, Giannis G., Buchine, Isaac, Aharon, Sigalit, Korobko, Roman, Stoumpos, Constantinos C., Egger, David A., Yaffe, Omer
We show that formamidinium lead bromide is unique among the halide perovskite crystals because its inorganic sub-lattice exhibits intrinsic local static disorder that co-exists with a well-defined average crystal structure. Our study combines THz-ran
Externí odkaz:
http://arxiv.org/abs/2211.06904
Autor:
Menahem, Matan, Benshalom, Nimrod, Asher, Maor, Aharon, Sigalit, Korobko, Roman, Safran, Sam, Hellman, Olle, Yaffe, Omer
Publikováno v:
Phys. Rev. Materials 7 (2023), 044602
The anharmonic lattice dynamics of oxide and halide perovskites play a crucial role in their mechanical and optical properties. Raman spectroscopy is one of the key methods used to study these structural dynamics. However, despite decades of research
Externí odkaz:
http://arxiv.org/abs/2208.05563
Autor:
Sharma, Rituraj, Benshalom, Nimrod, Asher, Maor, Brenner, Thomas M., Kossi, Anna, Yaffe, Omer, Korobko, Roman
$\delta$-Bi$_2$O$_3$ is one of the fastest known solid oxide ion conductors owing to its intrinsically defective fluorite-like structure with 25\% vacant sites in the O sub-lattice. Numerous diffraction measurements and molecular dynamics simulations
Externí odkaz:
http://arxiv.org/abs/2205.13289
Autor:
Benshalom, Nimrod, Asher, Maor, Jouclas, Rémy, Korobko, Roman, Schweicher, Guillaume, Liu, Jie, Geerts, Yves, Hellman, Olle, Yaffe, Omer
We have found that the polarization dependence of Raman scattering in organic crystals at finite temperatures can only be described by a fourth-rank formalism. This generalization of the second-rank Raman tensor $\mathcal{R}$ stems from the effect of
Externí odkaz:
http://arxiv.org/abs/2204.12528
Autor:
Brenner, Thomas M., Grumet, Manuel, Till, Paul, Asher, Maor, Zeier, Wolfgang G., Egger, David A., Yaffe, Omer
We employ THz-range temperature-dependent Raman spectroscopy and first-principles lattice-dynamical calculations to show that the undoped sodium ion conductors Na$_3$PS$_4$ and isostructural Na$_3$PSe$_4$ both exhibit anharmonic lattice dynamics. The
Externí odkaz:
http://arxiv.org/abs/2203.07955
We combine ab initio simulations and Raman scattering measurements to demonstrate explicit anharmonic effects in the temperature dependent dielectric response of a NaCl single crystal. We measure the temperature evolution of its Raman spectrum and co
Externí odkaz:
http://arxiv.org/abs/2108.04589
Autor:
Mor, Ori Ezrah, Ohana, Tal, Borne, Adrien, Posner, Yael Diskin, Asher, Maor, Yaffe, Omer, Shanzer, Abraham, Dayan, Barak
Crystals and fibers doped with Rare Earth (RE) ions provide the basis to most of today's solid-state optical systems, from lasers and telecom devices to emerging potential quantum applications such as quantum memories and optical to microwave convers
Externí odkaz:
http://arxiv.org/abs/2108.03727