Zobrazeno 1 - 10
of 398
pro vyhledávání: '"Palacios, J. J."'
Excitons, namely neutral excitations in a system of electrons arising from the electron-hole interaction, are often essential to explain optical measurements in materials. They are governed by the Bethe-Salpeter equation, which can be cast into a mat
Externí odkaz:
http://arxiv.org/abs/2410.19945
Autor:
Uría-Álvarez, A. J., Palacios, J. J.
Bismuth has been shown to be topological in its different allotropes and compounds, with one of the most notable examples being the Bi-Sb alloy, the first 3D topological insulator ever discovered. In this paper we explore two-dimensional alloys of Bi
Externí odkaz:
http://arxiv.org/abs/2410.16034
Autor:
Esteve-Paredes, J. J., García-Blázquez, M. A., Uría-Álvarez, A. J., Camarasa-Gómez, M., Palacios, J. J.
It is well-known that exciton effects are determinant to understand the optical absorption spectrum of low-dimensional materials. However, the role of excitons in nonlinear optical responses has been much less investigated at an experimental level. A
Externí odkaz:
http://arxiv.org/abs/2406.14215
The bulk photovoltaic effect is an experimentally verified phenomenon by which a direct charge current is induced within a non-centrosymmetric material by light illumination. Calculations of its intrinsic contribution, the shift current, are nowadays
Externí odkaz:
http://arxiv.org/abs/2308.09641
It is theoretically well established that a spin-dependent electron transmission generally appears in chiral systems, even without magnetic components, as long as a strong spin-orbit coupling is present in some of its elements. However, how this tran
Externí odkaz:
http://arxiv.org/abs/2306.17312
Autor:
Dednam, W., García-Blázquez, M. A., Zotti, Linda A., Lombardi, E. B., Sabater, C., Pakdel, S., Palacios, J. J.
Publikováno v:
ACS Nano 17 (7), 6452-6465 (2023)
Spin-orbit coupling gives rise to a range of spin-charge interconversion phenomena in non-magnetic systems where certain spatial symmetries are reduced or absent. Chirality-induced spin selectivity (CISS), a term that generically refers to a spin-dep
Externí odkaz:
http://arxiv.org/abs/2211.04830
Low-temperature scanning tunneling microscopy is used here to study dynamic bonding of gold atoms on surfaces under low coordination conditions. In the experiments, using an atomically-sharp gold tip, a gold adatom is deposited onto a gold surface wi
Externí odkaz:
http://arxiv.org/abs/2205.14203
Autor:
Esteve-Paredes, J. J., Palacios, J. J.
We present a comprehensive study of the velocity operator, $\hat{\boldsymbol{v}}=\frac{i}{\hbar} [\hat{H},\hat{\boldsymbol{r}}]$, when used in crystalline solids calculations. The velocity operator is key to the evaluation of a number of physical pro
Externí odkaz:
http://arxiv.org/abs/2201.12290
Autor:
González-Herrero, H., Gómez-Rodríguez, J. M., Mallet, P., Moaied, M., Palacios, J. J., Salgado, C., Ugeda, M. M., Veuillen, J. Y., Yndurain, F., Brihuega, I.
Publikováno v:
Science 352, Issue 6284, 437-441 (2016)
Isolated hydrogen atoms absorbed on graphene are predicted to induce magnetic moments. Here we demonstrate that the adsorption of a single hydrogen atom on graphene induces a magnetic moment characterized by a ~20 meV spin-split state at the Fermi en
Externí odkaz:
http://arxiv.org/abs/2009.13150
Autor:
Pakdel, Sahar, Palacios, J. J.
We present a theoretical study of the phase-coherent DC conductivity of few-layered antimonene in the presence of surface disorder. It is well known that while a single layer is a trivial semiconductor, multiple layers (typically a minimum of $\appro
Externí odkaz:
http://arxiv.org/abs/1912.09475