Zobrazeno 1 - 10 of 42 pro vyhledávání: '"R R, Urbano"'
1
Akademický článek
Local investigation of the crystal electric field ground-state in CeCu(Sb,Bi)$_2$ heavy fermions
Autor: Davi Zau, G. S. Freitas, P. G. Pagliuso, R. R. Urbano
Publikováno v: SciPost Physics Proceedings, Iss 11, p 017 (2023)
In this work, we performed systematic Nuclear Magnetic Resonance (NMR) and magnetic susceptibility experiments in CeCuSb$_2$ single-crystals. The main findings were compared to previous report for CeCuBi$_2$. The NMR spectra and transferred hyperfine
Externí odkaz: https://doaj.org/article/6501f664c34a45e7ac6768b25b6d00ef
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2
Akademický článek
Surface excitations relaxation in the Kondo insulator Sm_{1−x}Gd_{x}B_{6}
Autor: J. C. Souza, M. König, M. V. Ale Crivillero, M. O. Malcolms, R. R. Urbano, Z. Fisk, P. F. S. Rosa, P. G. Pagliuso, S. Wirth, J. Sichelschmidt
Publikováno v: Physical Review Research, Vol 3, Iss 3, p 033016 (2021)
The interplay between nontrivial topological states of matter and strong electronic correlations is one of the most compelling open questions in condensed matter physics. Due to experimental challenges, there is an increasing desire to find more micr
Externí odkaz: https://doaj.org/article/fea836e4c6fa41ba90b722563f18f395
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5
Akademický článek
Metallic islands in the Kondo insulator SmB_{6}
Autor: J. C. Souza, P. F. S. Rosa, J. Sichelschmidt, M. Carlone, P. A. Venegas, M. O. Malcolms, P. M. Menegasso, R. R. Urbano, Z. Fisk, P. G. Pagliuso
Publikováno v: Physical Review Research, Vol 2, Iss 4, p 043181 (2020)
The predicted interplay between Kondo physics and nontrivial topology in SmB_{6} has stimulated many experimental reports, some of which are in apparent contradiction. The origin of the dispute may lie in the fragility of the Kondo insulating phase i
Externí odkaz: https://doaj.org/article/62c9cb18e85c40bfa671c342ec346e0b
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6
Akademický článek
Diffusive-like effects and possible non trivial local topology on the half-Heusler YPdBi compound
Autor: J. C. Souza, G. G. Lesseux, R. R. Urbano, C. Rettori, P. G. Pagliuso
Publikováno v: AIP Advances, Vol 8, Iss 5, Pp 055713-055713-6 (2018)
The non-ambiguous experimental identification of topological states of matter is one of the main interesting problems regarding this new quantum state of matter. In particular, the half-Heusler family RMT (R = rare-earth, T = Pd, Pt or Au and T = Bi,
Externí odkaz: https://doaj.org/article/4e269617066e49ed86db07b0fbcbae5e
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8
Akademický článek
Anharmonic rattling vibrations effects in the ESR of Er3+ doped SmB6 Kondo insulator
Autor: G. G. Lesseux, P. F. S. Rosa, Z. Fisk, P. Schlottmann, P. G. Pagliuso, R. R. Urbano, C. Rettori
Publikováno v: AIP Advances, Vol 7, Iss 5, Pp 055709-055709-5 (2017)
We report X-band Electron Spin Resonance (ESR) experiments on ≈ 0.2% and ≈ 0.7 % Er3+ doped SmB6 at low temperature (4 K - 40 K). The crystal field ground state of Er3+ in SmB6 is a Γ8 quartet with a nearby Γ6 excited doublet. The angular depen
Externí odkaz: https://doaj.org/article/b189cc95d0e249dfbf6cb953d51cc46a
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9
Slow crystalline electric field fluctuations in the Kondo lattice SmB$_{6}$
Autor: M. Carlone, J. C. Souza, J. Sichelschmidt, P. F. S. Rosa, R. R. Urbano, P. G. Pagliuso, Z. Fisk, P. A. Venegas, P. Schlottmann, C. Rettori
This work reports on the temperature dependence of the electron spin resonance (ESR) of Gd$^{3+}$-doped SmB$_{6}$ single crystals at X- and Q-band microwave frequencies in different crystallographic directions. We found an anomalous inhomogeneous bro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c7a7de7929ec1d07e1deda040602b0f
http://arxiv.org/abs/2201.10940
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10
Exchange interaction between localized magnetic moments and conduction-electrons in Er doped gold nanoparticles synthesized by laser ablation in water
Autor: F. Fabris, A. F. García-Flores, R. R. Urbano, C. Rettori
Publikováno v: Journal of Applied Physics. 131:213903
In this work, we report a fundamental study on the exchange interaction between localized rare earth magnetic moments and conduction electrons of Er3+ diluted in Au metallic nanoparticles (NPs) produced by laser ablation in liquid. The study was carr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cbb6f882914bcf09280a8726e72f465c
https://doi.org/10.1063/5.0089296
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