Zobrazeno 1 - 10
of 497
pro vyhledávání: '"Urbano R."'
Autor:
Souza, J. C., Carlone, M., Lesseux, G. G., Pizzi, H. B., Freitas, G. S., Urbano, R. R., Venegas, P. A., Pagliuso, P. G.
The gap opening mechanism of a topological insulator, the quantum anomalous Hall effect and the axion physics are still pressing open questions and a microscopic viewpoint to further understand the role of magnetism in topology is highly desirable. I
Externí odkaz:
http://arxiv.org/abs/2211.16048
Autor:
Carlone, M., Souza, J. C., Sichelschmidt, J., Rosa, P. F. S., Urbano, R. R., Pagliuso, P. G., Fisk, Z., Venegas, P. A., Schlottmann, P., Rettori, C.
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:
http://arxiv.org/abs/2201.10940
Autor:
Souza, J. C., König, M., Crivillero, M. V. Ale, Malcolms, M. O., Urbano, R. R., Fisk, Z., Rosa, P. F. S., Pagliuso, P. G., Wirth, S., Sichelschmidt, J.
Publikováno v:
Phys. Rev. Research 3, 033016 (2021)
The interplay between non-trivial 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 mic
Externí odkaz:
http://arxiv.org/abs/2106.05217
Autor:
Menegasso, P., Souza, J. C., Vinograd, I., Wang, Z., Edwards, S. P., Pagliuso, P. G., Curro, N. J., Urbano, R. R.
Publikováno v:
Phys. Rev. B 104, 035154 (2021)
The transferred hyperfine interaction between nuclear and electron spins in an heavy fermion material depends on the hybridization between the $f$-electron orbitals and those surrounding a distant nucleus. In CeMIn$_5$ (M=Rh, Ir, Co), both the hyperf
Externí odkaz:
http://arxiv.org/abs/2010.08636
Autor:
Souza, J. C., Rosa, P. F. S., Sichelschmidt, J., Carlone, M., Venegas, P. A., Malcolms, M. O., Menegasso, P. M., Urbano, R. R., Fisk, Z., Pagliuso, P. G.
The predicted interplay between Kondo physics and non-trivial topology in SmB$_{6}$ has stimulated many experimental reports, some of which are in apparent contradiction. The origin of the dispute may lie on the fragility of the Kondo insulating phas
Externí odkaz:
http://arxiv.org/abs/2010.03719
Autor:
Lesseux, G. G., Sakai, H., Hattori, T., Tokunaga, Y., Kambe, S., Kuhns, P. L., Reyes, A. P., Thompson, J. D., Pagliuso, P. G., Urbano, R. R.
Publikováno v:
Phys. Rev. B 101, 165111 (2020)
CeRhIn$_{5}$ is a Kondo-lattice prototype in which a magnetic field B$\bf{^{\ast}\simeq}$ 30 T induces an abrupt Fermi-surface (FS) reconstruction and pronounced in-plane electrical transport anisotropy all within its antiferromagnetic state. Though
Externí odkaz:
http://arxiv.org/abs/1905.02861
Synchrotron x-ray diffraction experiments were performed on BaFe$_2$As$_2$ and Sr(Fe$_{1-x}$Co$_{x}$)$_2$As$_2$ single crystals as a function of temperature and applied magnetic field along the tetragonal $[1 \bar{1} 0]$ direction, complemented by el
Externí odkaz:
http://arxiv.org/abs/1803.00888
Autor:
Peña, J. P., Piva, M. M., Jesus, C. B. R., Lesseux, G. G., Garitezi, T. M., Tobia, D., Rosa, P. F. S., Grant, T., Fisk, Z., Adriano, C., Urbano, R. R., Pagliuso, P. G., Pureur, P.
Publikováno v:
Physica C: Superconductivity and its applications 531 (2016) 30-38
We report on electrical resistivity, magnetoresistance (MR) and Hall effect measurements in four non-superconducting BaFe$_{2-x}$TM$_x$As$_2$ (TM = Mn, Cu and Ni) single crystals with small values of the chemical substitution $x$. The spin density wa
Externí odkaz:
http://arxiv.org/abs/1703.00999
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Autor:
Rosa, P. F. S., Adriano, C., Garitezi, T. M., Piva, M. M., Mydeen, K., Grant, T., Fisk, Z., Nicklas, M., Urbano, R. R., Fernandes, R. M., Pagliuso, P. G.
Publikováno v:
Sci. Rep. 4, 6252 (2014)
The possible existence of a sign-changing gap symmetry in BaFe$_{2}$As$_{2}$-derived superconductors (SC) has been an exciting topic of research in the last few years. To further investigate this subject we combine Electron Spin Resonance (ESR) and p
Externí odkaz:
http://arxiv.org/abs/1409.1287