Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Tolentino, Helio"'
Autor:
Ijaz, Palvasha, Imran, Muhammad, Soares, Márcio M., Tolentino, Hélio C. N., Martín-García, Beatriz, Giannini, Cinzia, Moreels, Iwan, Manna, Liberato, Krahne, Roman
Publikováno v:
J. Phys. Chem. Lett. 2020
The photoluminescence (PL), color purity, and stability of lead halide perovskite nanocrystals depend critically on the surface passivation. We present a study on the temperature dependent PL and PL decay dynamics of lead bromide perovskite nanocryst
Externí odkaz:
http://arxiv.org/abs/2004.08310
Autor:
Teixeira, Verônica C., Silva, Joelson C., Silva, Francisco C.M., Szostak, Rodrigo, Guaita, Maria Gabriella D., Kofukuda, Leonardo M., Piccino Neto, Antonio C., Sotero, Anna P.S., Neckel, Itamar T., Pérez, Carlos A., Galante, Douglas, Tolentino, Hélio C.N.
Publikováno v:
In Optical Materials: X December 2023 20
Autor:
Massa, Néstor E., Ramos, Aline Y., Tolentino, Helio C. N., Sousa-Neto, Narcizo M., Fonseca Jr., Jairo, Alonso, José Antonio
We report on XANES and EXAFS measurements of SmNiO3 from 20 K to 600 K and up to 38 GPa at the Ni K- and Sm L3- edges. A multiple component pre- Ni K-edge tail is understood originating from 1s transitions to 3d-4p states while a post-edge shoulder i
Externí odkaz:
http://arxiv.org/abs/1512.03011
Autor:
Lamirand, Anne D., De Santis, Maurizio, Soares, Marcio M., Ramos, Aline Y., Grenier, Stephane, Tolentino, Helio C. N.
The structure and strain of ultrathin CoO films grown on a Pt(001) substrate and on a ferromagnetic PtFe pseudomorphic layer on Pt(001) have been determined with insitu and real time surface x-ray diffraction. The films grow epitaxially on both surfa
Externí odkaz:
http://arxiv.org/abs/1410.6833
Autor:
Ramos, Aline Y., Souza-Neto, Narcizo M., Tolentino, Helio C. N., Bunau, Oana, Joly, Yves, Grenier, Stephane, Itie, Jean-Paul, Flank, Anne-Marie, Lagarde, Pierre, Caneiro, Alberto
Using X-ray absorption spectroscopy (XAS), we studied the local structure in LaMnO3 under applied pressure across and well above the insulator to metal (IM) transition. A hysteretic behavior points to the coexistence of two phases within a large pres
Externí odkaz:
http://arxiv.org/abs/1110.2667
Autor:
Souza-Neto, Narcizo M., Ramos, Aline Y., Tolentino, Helio C. N., Martins, Alessandro, Santos, Antonio D.
A method of using X-ray absorption spectroscopy (XAS) together with resolved grazing incidence geometry for depth profiling atomic, electronic, chemical or magnetic local structures in thin films is presented. The quantitative deconvolution of thickn
Externí odkaz:
http://arxiv.org/abs/0901.4542
Akademický článek
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Autor:
Ramos, Aline Y., Tolentino, Hélio C. N., Souza-Neto, Narcizo M., Itié, Jean-Paul, Morales, Liliana, Caneiro, Alberto
The local environment of manganese atoms in LaMnO3 under pressure up to 15.3 GPa has been studied by x-ray absorption spectroscopy. For pressures below 8 GPa, no change is detected within the MnO6 octahedra. Above this pressure a continuous reduction
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701759
The remarkable polarization properties of the synchrotron light have lead to the advent of modern synchrotron-related spectroscopic studies with angular and/or magnetic selectivity. We give here an overview of the prominent aspect of the polarization
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412280
Autor:
Piamonteze, Cínthia, Tolentino, Hélio C. N., Ramos, Aline Y., Massa, Nestor E., Alonso, Jose A., Martínez-Lope, Maria J., Casais, Maria T.
The short-range organization around Ni atoms in orthorhombic $R$NiO$_{3}$ ($R$=Pr,Nd,Eu) perovskites has been studied over a wide temperature range by Ni K-edge x-ray absorption spectroscopy. Our results demonstrate that two different Ni sites, with
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412277