Zobrazeno 1 - 10
of 945
pro vyhledávání: '"Gouveia J"'
Autor:
Coutinho, J., Gouveia, J. D., Makino, T., Ohshima, T., Pastuović, Ž., Bakrač, L., Brodar, T., Capan, I.
Publikováno v:
Physical Review B 103, L180102 (2021)
The list of semiconductor materials with spectroscopically fingerprinted self-interstitials is very short. The M-center in 4H-SiC, a bistable defect responsible for a family of electron traps, has been deprived of a model which could unveil its real
Externí odkaz:
http://arxiv.org/abs/2105.04209
Autor:
Gouveia, J. D., Coutinho, J.
Publikováno v:
Electronic Structure 1, 015008 (2019)
Hybrid functionals often improve considerably the accuracy of density-functional calculations, in particular of quantities resulting from the band structure. In plane-wave (PW) calculations this benefit comes at the cost of an increase in computation
Externí odkaz:
http://arxiv.org/abs/1902.00281
Publikováno v:
In Electric Power Systems Research August 2021 197
Publikováno v:
Phys. Rev. B 94, 195132 (2016)
We study the slow time evolution of localized states of the open-boundary Lieb lattice when a magnetic flux is applied perpendicularly to the lattice and increased linearly in time. In this system, Dirac cones periodically disappear, reappear and tou
Externí odkaz:
http://arxiv.org/abs/1607.04326
Autor:
Gouveia, J. D., Dias, R. G.
We study the mean-field phase diagram of the two-dimensional (2D) Hubbard model in the Lieb lattice allowing for spin and charge density waves. Previous studies of this diagram have shown that the mean-field magnetization surprisingly deviates from t
Externí odkaz:
http://arxiv.org/abs/1505.01656
Autor:
Dias, R. G., Gouveia, J. D.
We present a method of construction of exact localized many-body eigenstates of the Hubbard model in decorated lattices, both for $U=0$ and $U\rightarrow\infty$. These states are localized in what concerns both hole and particle movement. The startin
Externí odkaz:
http://arxiv.org/abs/1505.00570
Autor:
Gouveia, J. D., Dias, R. G.
Publikováno v:
J.D. Gouveia, R.G. Dias, Spiral ferrimagnetic phases in the two-dimensional Hubbard model, Solid State Communications, Volume 185, May 2014, Pages 21-24, ISSN 0038-1098, http://dx.doi.org/10.1016/j.ssc.2014.01.004
We address the possibility of spiral ferrimagnetic phases in the mean-field phase diagram of the two-dimensional (2D) Hubbard model. For intermediate values of the interaction $U$ ($6 \lesssim U/t \lesssim 11$) and doping $n$, a spiral ferrimagnetic
Externí odkaz:
http://arxiv.org/abs/1505.00583
Autor:
Gouveia, J. D., Dias, R. G.
Publikováno v:
Journal of Magnetism and Magnetic Materials, Volume 382, 15 May 2015, Pages 312-317, ISSN 0304-8853
We study the mean-field phase diagram of the repulsive Hubbard model in the Lieb lattice. Far from half-filling, the most stable phases are paramagnetism for low on-site interaction $U/t$ and ferromagnetism for high $U/t$, as in the case of the mean-
Externí odkaz:
http://arxiv.org/abs/1505.00578
Publikováno v:
In Electric Power Systems Research December 2020 189
Publikováno v:
In Personality and Individual Differences 1 October 2017 116:319-325