João M. B. Lopes dos Santos
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
João M. B. Lopes dos Santos has a total of 78 co-authors. Here are the top co-authors by number of shared publications:
- Nuno M. R. Peres
International Iberian Nanotechnology Laboratory (INL)
21 shared publications - Antonio Helio Castro Neto
National University of Singapore
14 shared publications - João Manuel Viana Parente Lopes
Centro de Física das Universidades do Minho e Porto (CF-UM-UP), Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto
12 shared publications - Eduardo V. Castro
Universidade do Porto
8 shared publications - Francisco Guinea
IMDEA Nanoscience
6 shared publications - Ana Rita Mota
Faculdade de Ciências Universidade do Porto
4 shared publications
Latest Publications
- 30 December 2025
- Published by ICETA in Revista de Ciência Elementar
- Vol. 13 (4)
O Princípio de sobreposição
- 30 December 2025
- Published by ICETA in Revista de Ciência Elementar
- Vol. 13 (4)
O Princípio de sobreposição
- Open Access
- 19 June 2023
- Published by Sociedade Brasileira de Física in A Física Na Escola
- Vol. 21, 220808
Aprender circuitos elétricos com estações laboratoriais para desenvolver competências metacognitivas
Décadas de investigação confirmam que somente uma pequena percentagem de alunos do Ensino Médio (e ensino superior) desenvolve uma compreensão profunda e significativa de circuitos elétricos. Aprender em equipe através do modelo das estações laboratoriais tem-se revelado promissor no contexto do ensino de física. Neste artigo, são apresentadas oito estações laboratoriais sobre circuitos DC, com a duração de 15 minutos cada, que podem ser utilizadas no ensino fundamental e/ou Ensino Médio. As estações foram construídas a partir de indicadores internacionais sobre o tema e foram concebidas para estimular o desenvolvimento de competências metacognitivas.
- 19 June 2023
- Published by Sociedade Brasileira de Física in A Física Na Escola
- Vol. 21, 220808
Open AccessAprender circuitos elétricos com estações laboratoriais para desenvolver competências metacognitivas
Décadas de investigação confirmam que somente uma pequena percentagem de alunos do Ensino Médio (e ensino superior) desenvolve uma compreensão profunda e significativa de circuitos elétricos. Aprender em equipe através do modelo das estações laboratoriais tem-se revelado promissor no contexto do ensino de física. Neste artigo, são apresentadas oito estações laboratoriais sobre circuitos DC, com a duração de 15 minutos cada, que podem ser utilizadas no ensino fundamental e/ou Ensino Médio. As estações foram construídas a partir de indicadores internacionais sobre o tema e foram concebidas para estimular o desenvolvimento de competências metacognitivas.
- 25 June 2021
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 126 (25) , 259701
Comment on “Jerk Current: A Novel Bulk Photovoltaic Effect”
DOI: https://doi.org/10.1103/PhysRevLett.126.259701
- 25 June 2021
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 126 (25) , 259701
Comment on “Jerk Current: A Novel Bulk Photovoltaic Effect”
DOI: https://doi.org/10.1103/PhysRevLett.126.259701
- 30 December 2020
- Published by ICETA in Revista de Ciência Elementar
- Vol. 8 (4)
Sem Amarras
- Open Access
- 4 February 2020
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 32 (18) , 185701
A study of the nonlinear optical response of the plain graphene and gapped graphene monolayers beyond the Dirac approximation
In this work, we present numerical results for the second and third order conductivities of the plain graphene and gapped graphene monolayers associated with the second and third harmonic generation, the optical rectification and the optical Kerr effect. The frequencies considered here range from the microwave to the ultraviolet portion of the spectrum, the latter end of which had not yet been studied. These calculations are performed in the velocity gauge and directly address the components of the conductivity tensor. In the velocity gauge, the radiation field is represented by a power series in the vector potential, and we discuss a very efficient way of calculating its coefficients in the context of tight-binding models.
- 4 February 2020
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 32 (18) , 185701
Open AccessA study of the nonlinear optical response of the plain graphene and gapped graphene monolayers beyond the Dirac approximation
In this work, we present numerical results for the second and third order conductivities of the plain graphene and gapped graphene monolayers associated with the second and third harmonic generation, the optical rectification and the optical Kerr effect. The frequencies considered here range from the microwave to the ultraviolet portion of the spectrum, the latter end of which had not yet been studied. These calculations are performed in the velocity gauge and directly address the components of the conductivity tensor. In the velocity gauge, the radiation field is represented by a power series in the vector potential, and we discuss a very efficient way of calculating its coefficients in the context of tight-binding models.
- 28 May 2019
- Published by American Physical Society (APS) in Physical Review B
- Vol. 99 (20) , 205148
Global delocalization transition in the de Moura–Lyra model
The possibility of having a delocalization transition in the one-dimensional de Moura–Lyra class of models (having a power spectrum ) has been the object of a long-standing discussion in the literature. In this paper, we report numerical evidences that such a transition happens at , where the localization length (measured from the scaling of the conductance) is shown to diverge as . The persistent finite-size scaling of the data is shown to be caused by a very slow convergence of the nearest-neighbor correlator to its infinite-size limit, and controlled by the choice of a proper scaling parameter. Our results for these models are consistent with a localization of eigenstates that is driven by a persistent small-scale noise, which vanishes as . This interpretation is confirmed by analytical perturbative calculations which are built on previous work. Finally, the nature of the delocalization transition is discussed and the conclusions are illustrated by numerical work done in the regime.- 28 May 2019
- Published by American Physical Society (APS) in Physical Review B
- Vol. 99 (20) , 205148
Global delocalization transition in the de Moura–Lyra model
The possibility of having a delocalization transition in the one-dimensional de Moura–Lyra class of models (having a power spectrum ) has been the object of a long-standing discussion in the literature. In this paper, we report numerical evidences that such a transition happens at , where the localization length (measured from the scaling of the conductance) is shown to diverge as . The persistent finite-size scaling of the data is shown to be caused by a very slow convergence of the nearest-neighbor correlator to its infinite-size limit, and controlled by the choice of a proper scaling parameter. Our results for these models are consistent with a localization of eigenstates that is driven by a persistent small-scale noise, which vanishes as . This interpretation is confirmed by analytical perturbative calculations which are built on previous work. Finally, the nature of the delocalization transition is discussed and the conclusions are illustrated by numerical work done in the regime.- 28 February 2019
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 31 (17) , 175501
Spectral functions of one-dimensional systems with correlated disorder
We investigate the spectral function of Bloch states in a one-dimensional tight-binding non-interacting chain with two different models of static correlated disorder, at zero temperature. We report numerical calculations of the single-particle spectral function based on the Kernel polynomial method, which has an computational complexity. These results are then confirmed by analytical calculations, where precise conditions were obtained for the appearance of a classical limit in a single-band lattice system. Spatial correlations in the disordered potential give rise to non-perturbative spectral functions shaped as the probability distribution of the random on-site energies, even at low disorder strengths. In the case of disordered potentials with an algebraic power-spectrum, , we show that the spectral function is not self-averaging for .
- 28 February 2019
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 31 (17) , 175501
Spectral functions of one-dimensional systems with correlated disorder
We investigate the spectral function of Bloch states in a one-dimensional tight-binding non-interacting chain with two different models of static correlated disorder, at zero temperature. We report numerical calculations of the single-particle spectral function based on the Kernel polynomial method, which has an computational complexity. These results are then confirmed by analytical calculations, where precise conditions were obtained for the appearance of a classical limit in a single-band lattice system. Spatial correlations in the disordered potential give rise to non-perturbative spectral functions shaped as the probability distribution of the random on-site energies, even at low disorder strengths. In the case of disordered potentials with an algebraic power-spectrum, , we show that the spectral function is not self-averaging for .
- Open Access
Spectral Functions of One-Dimensional Systems with Correlated Disorder
We investigate the spectral function of Bloch states in an one-dimensional tight-binding non-interacting chain with two different models of static correlated disorder, at zero temperature. We report numerical calculations of the single-particle spectral function based on the Kernel Polynomial Method, which has an $\mathcal{O}(N)$ computational complexity. These results are then confirmed by analytical calculations, where precise conditions were obtained for the appearance of a classical limit in a single-band lattice system. Spatial correlations in the disordered potential give rise to non-perturbative spectral functions shaped as the probability distribution of the random on-site energies, even at low disorder strengths. In the case of disordered potentials with an algebraic power-spectrum, $\propto\left|k\right|^{-\alpha}$, we show that the spectral function is not self-averaging for $\alpha\geq1$.Open AccessSpectral Functions of One-Dimensional Systems with Correlated Disorder
We investigate the spectral function of Bloch states in an one-dimensional tight-binding non-interacting chain with two different models of static correlated disorder, at zero temperature. We report numerical calculations of the single-particle spectral function based on the Kernel Polynomial Method, which has an $\mathcal{O}(N)$ computational complexity. These results are then confirmed by analytical calculations, where precise conditions were obtained for the appearance of a classical limit in a single-band lattice system. Spatial correlations in the disordered potential give rise to non-perturbative spectral functions shaped as the probability distribution of the random on-site energies, even at low disorder strengths. In the case of disordered potentials with an algebraic power-spectrum, $\propto\left|k\right|^{-\alpha}$, we show that the spectral function is not self-averaging for $\alpha\geq1$. - 30 September 2018
- Published by ICETA in Revista de Ciência Elementar
- Vol. 6 (3)
Biblioteca Nacional de Singapura
- 30 September 2018
- Published by ICETA in Revista de Ciência Elementar
- Vol. 6 (3)
Biblioteca Nacional de Singapura
- Open Access
- 30 September 2018
- Published by ICETA in Revista de Ciência Elementar
- Vol. 6 (3)
Beleza e Ciência
Os físicos e matemáticos usam frequentemente conceitos estéticos para se referir às suas descobertas. Dirac, em particular, valorizava a beleza como critério de verdade:
- 30 September 2018
- Published by ICETA in Revista de Ciência Elementar
- Vol. 6 (3)
Open AccessBeleza e Ciência
Os físicos e matemáticos usam frequentemente conceitos estéticos para se referir às suas descobertas. Dirac, em particular, valorizava a beleza como critério de verdade: