Zobrazeno 1 - 10
of 217
pro vyhledávání: '"Fernandes,R. M. P"'
The Pauli exclusion principle combined with interactions between fermions is a unifying basic mechanism that can give rise to quantum phases with spin order in diverse physical systems. Transition-metal ferromagnets, with isotropic ordering respectin
Externí odkaz:
http://arxiv.org/abs/2411.00717
Autor:
Dewey, J. E., Chaturvedi, V., Webb, T. A., Sharma, P., Postiglione, W. M., Quarterman, P., Balakrishnan, P. P., Kirby, B. J., Figari, L., Korostynski, C., Jacobson, A., Birol, T., Fernandes, R. M., Pasupathy, A. N., Leighton, C.
Pr-containing perovskite cobaltites exhibit unusual valence transitions, coupled to coincident structural, spin-state, and metal-insulator transitions. Heteroepitaxial strain was recently used to control these phenomena in the model (Pr$_{1-y}$Y$_y$)
Externí odkaz:
http://arxiv.org/abs/2311.06127
Autor:
Donoway, E., Trevisan, T. V., Peláez, A. Liebman, Day, R. P., Yamakawa, K., Sun, Y., Soh, J. R., Prabhakaran, D., Boothroyd, A. T., Fernandes, R. M., Analytis, J. G., Moore, J. E., Orenstein, J., Sunko, V.
One of the prime material candidates to host the axion insulator state is EuIn$_{2}$As$_{2}$. First-principles calculations predicted the emergence of this exotic topological phase based on the assumption of a collinear antiferromagnetic structure. H
Externí odkaz:
http://arxiv.org/abs/2310.16018
Autor:
Hameed, S., Wang, Z., Gautreau, D. M., Joe, J., Olson, K. P., Chi, S., Gehring, P. M., Hong, T., Pajerowski, D. M., Williams, T. J., Xu, Z., Matsuda, M., Birol, T., Fernandes, R. M., Greven, M.
Publikováno v:
Phys. Rev. B 108, 134406 (2023)
Neutron scattering is used to study spin waves in the three-dimensional Heisenberg ferromagnet YTiO$_3$, with spin-spin exchange disorder introduced $via$ La-substitution at the Y site. No significant changes are observed in the spin-wave dispersion
Externí odkaz:
http://arxiv.org/abs/2305.04280
Autor:
Guguchia, Z., Mielke III, C., Das, D., Gupta, R., Yin, J. -X., Liu, H., Yin, Q., Christensen, M. H., Tu, Z., Gong, C., Shumiya, N., Gamsakhurdashvili, Ts., Elender, M., Dai, Pengcheng, Amato, A., Shi, Y., Lei, H. C., Fernandes, R. M., Hasan, M. Z., Luetkens, H., Khasanov, R.
Unconventional superconductors often feature competing orders, small superfluid density, and nodal electronic pairing. While unusual superconductivity has been proposed in the kagome metals AV3Sb5, key spectroscopic evidence has remained elusive. Her
Externí odkaz:
http://arxiv.org/abs/2202.07713
Autor:
Heinsdorf, N., Christensen, M. H., Iraola, M., Zhang, S., Yang, F., Birol, T., Batista, C. D., Valentí, R., Fernandes, R. M.
Publikováno v:
Phys. Rev. B 104, 075101 (2021)
Employing a combination of symmetry analysis, low-energy modeling, and ab initio simulations, we predict the presence of magnetic-field-induced Weyl points close to the Fermi level in CaKFe$_4$As$_4$. Depending on the relative strengths of the magnet
Externí odkaz:
http://arxiv.org/abs/2101.05301
Autor:
Thomas, S. M., Santos, F. B., Christensen, M. H., Asaba, T., Ronning, F., Thompson, J. D., Bauer, E. D., Fernandes, R. M., Fabbris, G., Rosa, P. F. S.
UTe$_2$ is a recently discovered unconventional superconductor that has attracted much interest due to its many intriguing properties - a large residual density-of-states in the superconducting state, re-entrant superconductivity in high magnetic fie
Externí odkaz:
http://arxiv.org/abs/2005.01659
Autor:
Hameed, S., Pelc, D., Anderson, Z. W., Klein, A., Spieker, R. J., Yue, L., Das, B., Ramberger, J., Lukas, M., Liu, Y., Krogstad, M. J., Osborn, R., Li, Y., Leighton, C., Fernandes, R. M., Greven, M.
The properties of quantum materials are commonly tuned using experimental variables such as pressure, magnetic field and doping. Here we explore a different approach: irreversible, plastic deformation of single crystals. We show for the superconducto
Externí odkaz:
http://arxiv.org/abs/2005.00514
Publikováno v:
Phys. Rev. B 102, 184512 (2020)
Electronic nematic behavior has been identified and studied in iron-based superconductors for some time, particularly in the well-known BaFe$_2$As$_2$ system, where it is well-known to compete with superconductivity. On the other hand, it has been sh
Externí odkaz:
http://arxiv.org/abs/2004.13134
Autor:
Merritt, A. M., Weber, F., Castellan, J. -P., Wolf, Th., Ishikawa, D., Said, A. H., Alatas, A., Fernandes, R. M., Baron, A. Q. R., Reznik, D.
Publikováno v:
Phys. Rev. Lett. 124, 157001 (2020)
Nematicity is ubiquitous in electronic phases of high-$T_c$ superconductors, particularly in the Fe-based systems. We used inelastic x-ray scattering to extract the temperature-dependent nematic correlation length $\xi$ from the anomalous softening o
Externí odkaz:
http://arxiv.org/abs/2001.01343