Zobrazeno 1 - 10
of 199
pro vyhledávání: '"Garcia Fernandez, Pablo"'
Autor:
Sánchez-Movellán, Inés, Santamaría-Fernández, Guillermo, García-Fernández, Pablo, Aramburu, José Antonio, Moreno, Miguel
Using first-principles DFT calculations, we analyze the origin of the different crystal structures, optical and magnetic properties of two basic families of layered fluoride materials with formula A2MF4 (M = Ag, Cu, Ni, Mn; A = K, Cs, Rb). On one han
Externí odkaz:
http://arxiv.org/abs/2308.00433
Autor:
Gómez-Ortiz, Fernando, Aramberri, Hugo, López, Juan M., García-Fernández, Pablo, Íñiguez, Jorge, Junquera, Javier
Publikováno v:
Physical Review B 107, 174102 (2023)
We report second-principles simulations on the structural and energetic properties of domains in (PbTiO$_{3}$)$_{n}$/(SrTiO$_{3}$)$_{n}$ superlattices. For the explored layer thickness ($n$ ranging between 8 and 16 unit cells) and lateral sizes of th
Externí odkaz:
http://arxiv.org/abs/2303.01755
We study the emergence of Berezinskii-Kosterlitz-Thouless (BKT) phases in (PbTiO$_3$)$_3$/(SrTiO$_3$)$_3$ superlattices by means of second-principles simulations. Beyond a threshold tensile epitaxial strain of $\epsilon = 0.25 \%$ the local dipole mo
Externí odkaz:
http://arxiv.org/abs/2207.09718
We study the equilibrium arrangements of polarization vortices in (PbTiO$_3$)$_n$/(SrTiO$_3$)$_n$ superlattices by means of second-principles simulations. We find that, at low temperatures, polarization vortices organize in a regular arrangement in w
Externí odkaz:
http://arxiv.org/abs/2203.03522
Autor:
Zhou, Linming, Dai, Cheng, Meisenheimer, Peter, Das, Sujit, Wu, Yongjun, Gómez-Ortiz, Fernando, García-Fernández, Pablo, Huang, Yuhui, Junquera, Javier, Chen, Long-Qing, Ramesh, Ramamoorthy, Hong, Zijian
Publikováno v:
Adv. Funct. Mater. 2022, 2111392
Order-disorder transitions are widely explored in various vortex structures in condensed matter physics, i.e., in the type-II superconductors and Bose-Einstein condensates. In this study, we have investigated the ordering of the polar vortex phase in
Externí odkaz:
http://arxiv.org/abs/2108.06488
Autor:
Behera, Piush, May, Molly A., Gómez-Ortiz, Fernando, Susarla, Sandhya, Das, Sujit, Nelson, Christopher T., Caretta, Lucas, Hsu, Shang-Lin, McCarter, Margaret R., Savitzky, Benjamin H., Barnard, Edward S., Raja, Archana, Hong, Zijian, García-Fernandez, Pablo, Lovesey, Stephen W., van der Laan, Gerrit, Ophus, Colin, Martin, Lane W., Junquera, Javier, Raschke, Markus B., Ramesh, Ramamoorthy
Polar textures have attracted significant attention in recent years as a promising analog to spin-based textures in ferromagnets. Here, using optical second harmonic generation based circular dichroism, we demonstrate deterministic and reversible con
Externí odkaz:
http://arxiv.org/abs/2105.14109
Autor:
Shao, Yu-Tsun, Das, Sujit, Hong, Zijian, Xu, Ruijuan, Chandrika, Swathi, Gómez-Ortiz, Fernando, García-Fernández, Pablo, Chen, Long-Qing, Hwang, Harold Y., Junquera, Javier, Martin, Lane W., Ramesh, Ramamoorthy, Muller, David A.
Polar skyrmions are predicted to emerge from the interplay of elastic, electrostatic and gradient energies, in contrast to the key role of the anti-symmetric Dzyalozhinskii-Moriya interaction in magnetic skyrmions. With the discovery of topologically
Externí odkaz:
http://arxiv.org/abs/2101.04545
Autor:
Nguyen, Kayla X., Jiang, Yi, Cao, Michael C., Purohit, Prafull, Yadav, Ajay K., García-Fernández, Pablo, Tate, Mark W., Chang, Celesta S., Aguado-Puente, Pablo, Íñiguez, Jorge, Gomez-Ortiz, Fernando, Gruner, Sol M., Junquera, Javier, Martin, Lane W., Ramesh, Ramamoorthy, Muller, D. A.
Orbital angular momentum and torque transfer play central roles in a wide range of magnetic textures and devices including skyrmions and spin-torque electronics(1-4). Analogous topological structures are now also being explored in ferroelectrics, inc
Externí odkaz:
http://arxiv.org/abs/2012.04134
Autor:
García, Alberto, Papior, Nick, Akhtar, Arsalan, Artacho, Emilio, Blum, Volker, Bosoni, Emanuele, Brandimarte, Pedro, Brandbyge, Mads, Cerdá, J. I., Corsetti, Fabiano, Cuadrado, Ramón, Dikan, Vladimir, Ferrer, Jaime, Gale, Julian, García-Fernández, Pablo, García-Suárez, V. M., García, Sandra, Huhs, Georg, Illera, Sergio, Korytár, Richard, Koval, Peter, Lebedeva, Irina, Lin, Lin, López-Tarifa, Pablo, Mayo, Sara G., Mohr, Stephan, Ordejón, Pablo, Postnikov, Andrei, Pouillon, Yann, Pruneda, Miguel, Robles, Roberto, Sánchez-Portal, Daniel, Soler, Jose M., Ullah, Rafi, Yu, Victor Wen-zhe, Junquera, Javier
Publikováno v:
J. Chem. Phys. 152, 204108 (2020)
A review of the present status, recent enhancements, and applicability of the SIESTA program is presented. Since its debut in the mid-nineties, SIESTA's flexibility, efficiency and free distribution has given advanced materials simulation capabilitie
Externí odkaz:
http://arxiv.org/abs/2006.01270
Publikováno v:
Phys. Rev. B 101, 174114 (2020)
We study from first-principles the structural and electronic properties of head-to-head (HH) and tail-to-tail (TT) 180$^\circ$ domain walls in isolated free-standing PbTiO$_{3}$ slabs. For sufficiently thick domains ($n$ = 16 unit cells of PbTiO$_{3}
Externí odkaz:
http://arxiv.org/abs/2004.02467