Zobrazeno 1 - 10
of 90
pro vyhledávání: '"P. Aguado-Puente"'
In spite of the interest in the two-dimensional electron gases (2DEGs) experimentally found at surfaces and interfaces, important uncertainties remain about the observed insulator--metal transitions (IMTs). Here we show how an explicit improper coupl
Externí odkaz:
http://arxiv.org/abs/2401.03016
The phenomenological theory for the polar instability giving rise to a two-dimensional electron gas at perovskite interfaces is hereby extended to include the coupling to perovskite tilts. A Landau theory for homogeneous tilts is first explored, sett
Externí odkaz:
http://arxiv.org/abs/2206.13555
Publikováno v:
Phys. Rev. B 106, L081103 (2022)
One of the key issues in the physics of topological insulators is whether the topologically non-trivial properties survive at finite temperatures and, if so, whether they disappear only at the temperature of topological gap closing. Here, we study th
Externí odkaz:
http://arxiv.org/abs/2203.00536
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:
Querales-Flores, José D., Aguado-Puente, Pablo, Dangić, Đorđe, Cao, Jiang, Chudzinski, Piotr, Todorov, Tchavdar N., Grüning, Myrta, Fahy, Stephen, Savić, Ivana
Publikováno v:
Phys. Rev. B 101, 235206 (2020)
The temperature renormalization of the bulk band structure of a topological crystalline insulator, SnTe, is calculated using first principles methods. We explicitly include the effect of thermal-expansion-induced modification of electronic states and
Externí odkaz:
http://arxiv.org/abs/2004.11959
Autor:
Troncoso, Javier F., Chudzinski, Piotr, Todorov, Tchavdar N., Aguado-Puente, Pablo, Grüning, Myrta, Kohanoff, Jorge J.
Publikováno v:
Phys. Rev. Materials 5, 014604 (2021)
PbTe is a leading thermoelectric material at intermediate temperatures, largely thanks to its low lattice thermal conductivity. However, its efficiency is too low to compete with other forms of power generation. This efficiency can be effectively enh
Externí odkaz:
http://arxiv.org/abs/2004.07076
Publikováno v:
Phys. Rev. Research 2, 043105 (2020)
We calculate the electronic structure of the narrow gap semiconductors PbTe, SnTe and GeTe in the cubic phase using density functional theory (DFT) and the $G_0W_0$ method. Within DFT, we show that the band ordering obtained with a conventional semil
Externí odkaz:
http://arxiv.org/abs/2003.06837
Publikováno v:
Journal of Physics: Condensed Matter 32, 4 (2019)
Despite being the archetypal thermoelectric material, still today some of the most exciting advances in the efficiency of these materials are being achieved by tuning the properties of PbTe. Its inherently low lattice thermal conductivity can be lowe
Externí odkaz:
http://arxiv.org/abs/1811.09319
Autor:
Sandhya Susarla, Pablo García-Fernández, Colin Ophus, Sujit Das, Pablo Aguado-Puente, Margaret McCarter, Peter Ercius, Lane W. Martin, Ramamoorthy Ramesh, Javier Junquera
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021)
The response of the electronic structure to the non-trivial polarization texture in PbTiO3/SrTiO3 superlattices has not been explored. Here, the authors reveal how the peaks of the spectra shift and change their local electronic structure depending o
Externí odkaz:
https://doaj.org/article/13b0baf4da5d4f49bd19df775d231795
Publikováno v:
Phys. Rev. B 92, 115406 (2015)
In the polar catastrophe scenario, polar discontinuity accounts for the driving force of the formation of a two-dimensional electron gas (2DEG) at the interface between polar and non-polar insulators. In this paper, we substitute the usual, non-ferro
Externí odkaz:
http://arxiv.org/abs/1506.04865