Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Piva, M. M."'
Autor:
Piva, M. M., Wawrzyńczak, R., Kumar, Nitesh, Kutelak, L. O., Lombardi, G. A., Reis, R. D. dos, Felser, C., Nicklas, M.
Publikováno v:
Phys. Rev. Materials 8 L041202 (2024)
At ambient pressure, HfTe$_{5}$ is a material at the boundary between a weak and a strong topological phase, which can be tuned by changes in its crystalline structure or by the application of high magnetic fields. It exhibits a Lifshitz transition u
Externí odkaz:
http://arxiv.org/abs/2404.13969
Publikováno v:
Phys. Rev. Materials 7 L111801 (2023)
Topological superconductors have long been sought for their potential use in quantum computing. The type-II Weyl semimetal MoTe$_{2}$ is an obvious candidate, exhibiting a superconducting state below 500 mK at ambient pressure, but the question remai
Externí odkaz:
http://arxiv.org/abs/2311.07136
Autor:
Piva, M. M., Souza, J. C., Lombardi, G. A., Pakuszewski, K. R., Adriano, C., Pagliuso, P. G., Nicklas, M.
Publikováno v:
Phys. Rev. Mater. 7, 074204 (2023)
The Weyl semimetal CeAlGe is a promising material to study nontrivial topologies in real and momentum space due to the presence of a topological magnetic phase. Our results at ambient pressure show that the electronic properties of CeAlGe are extreme
Externí odkaz:
http://arxiv.org/abs/2303.12144
Autor:
Piva, M. M., Souza, J. C., Brousseau-Couture, V., Sorn, Sopheak, Pakuszewski, K. R., John, Janas K., Adriano, C., Côté, M., Pagliuso, P. G., Paramekanti, Arun, Nicklas, M.
Publikováno v:
Phys. Rev. Research 5 013068 (2023)
In the ferromagnetic (FM) Weyl semimetal CeAlSi both space-inversion and time-reversal symmetries are broken. Our quantum oscillation (QO) data indicate that the FM ordering modifies the Fermi surface topology and also leads to an unusual drop in the
Externí odkaz:
http://arxiv.org/abs/2301.13707
Autor:
Piva, M. M., Xiang, L., Thompson, J. D., Bud'ko, S. L., Ribeiro, R. A., Canfield, P. C., Rosa, P. F. S.
Here we report the magnetic and electronic properties of recently discovered Ce$_{3}$Cd$_{2}$As$_{6}$. At ambient pressure, Ce$_{3}$Cd$_{2}$As$_{6}$ presents a semiconducting behavior with an activation gap of 74(1)~meV. At 136~K, a sudden increase o
Externí odkaz:
http://arxiv.org/abs/2203.10049
Autor:
de Figueiredo, A. G., Cantarino, M. R., Neto, W. R. da Silva, Pakuszewski, K. R., Grossi, R., Christovam, D. S., Souza, J. C., Piva, M. M., Freitas, G. S., Pagliuso, P. G., Adriano, C., Garcia, F. A.
The polarization dependence of the near edge x-ray absorption spectroscopy (XANES) is an element specific probe to the real-space distribution of the density of unoccupied states in solid-state materials. In this paper, we present Fe and As $K$-edge
Externí odkaz:
http://arxiv.org/abs/2112.09980
Autor:
Piva, M. M., Souza, J. C., Brousseau-Couture, V., Pakuszewski, K. R., John, Janas K., Adriano, C., Côté, M., Pagliuso, P. G., Nicklas, M.
Publikováno v:
extended version published in Phys. Rev. Research 5 013068 (2023)
In the ferromagnetic Weyl semimetal CeAlSi both space-inversion and time-reversal symmetries are broken. We use external pressure as an effective tuning parameter and relate three observations to the presence of a nontrivial topology in its ferromagn
Externí odkaz:
http://arxiv.org/abs/2111.05742
Autor:
Baenitz, M., Piva, M. M., Luther, S., Sichelschmidt, J., Ranjith, K. M., Dawczak-Dȩbicki, H., Ajeesh, M. O., Kim, S. -J., Siemann, G., Bigi, C., Manuel, P., Khalyavin, D., Sokolov, D. A., Mokhtari, P., Zhang, H., Yasuoka, H., King, P. D. C., Vinai, G., Polewczyk, V., Torelli, P., Wosnitza, J., Burkhardt, U., Schmidt, B., Rosner, H., Wirth, S., Kühne, H., Nicklas, M., Schmidt, M.
Our studies evidence an anisotropic magnetic order below $T_N = 32$~K. Susceptibility data in small fields of about 1~T reveal an antiferromagnetic (AFM) order for $H \perp c$, whereas for $H \parallel c$ the data are reminiscent of a field-induced f
Externí odkaz:
http://arxiv.org/abs/2109.02582
Autor:
Freitas, G. S., Piva, M. M., Grossi, R., Jesus, C. B. R., Souza, J. C., Christovam, D. S., Oliveira Jr., N. F., Leão, J. B., Adriano, C., Lynn, J. W., Pagliuso, P. G.
We have performed X-ray powder diffraction, magnetization, electrical resistivity, heat capacity and inelastic neutron scattering (INS) to investigate the physical properties of the intermetallic series of compounds CeCuBi$_{2-x}$Sb$_{x}$. These comp
Externí odkaz:
http://arxiv.org/abs/2010.03437
Autor:
Piva, M. M., Tartaglia, R., Freitas, G. S., Souza, J. C., Christovam, D. S., Thomas, S. M., Leão, J. B., Ratcliff, W., Lynn, J. W., Lane, C., Zhu, J. -X., Thompson, J. D., Rosa, P. F. S., Adriano, C., Granado, E., Pagliuso, P. G.
Publikováno v:
Phys. Rev. B 101, 214431 (2020)
We report the electronic and magnetic properties of stoichiometric CeAuBi$_{2}$ single crystals. At ambient pressure, CeAuBi$_{2}$ orders antiferromagnetically below a N\'{e}el temperature ($T_{N}$) of 19 K. Neutron diffraction experiments revealed a
Externí odkaz:
http://arxiv.org/abs/2008.04239