Zobrazeno 1 - 10
of 1 297
pro vyhledávání: '"Gopalakrishnan, J"'
Publikováno v:
Physical Review B 99, 195118 (2019)
The Fe electronic structure and magnetism in (i) monoclinic Ca$_2$FeReO$_6$ with a metal-insulator transition at $T_{MI} \sim 140$ K and (ii) quasi-cubic half-metallic Ba$_2$FeReO$_6$ ceramic double perovskites are probed by soft x-ray absorption spe
Externí odkaz:
http://arxiv.org/abs/1905.04988
Publikováno v:
In Wave Motion January 2022 108
Publikováno v:
SIAM Journal on Scientific Computing, Vol. 39, No. 6, pp. B1043-B1063, 2017
A spacetime domain can be progressively meshed by tent shaped objects. Numerical methods for solving hyperbolic systems using such tent meshes to advance in time have been proposed previously. Such schemes have the ability to advance in time by diffe
Externí odkaz:
http://arxiv.org/abs/1604.01081
Publikováno v:
Computers and Mathematics with Applications, Volume 72, Issue 3, pp. 494-522, 2016
Discontinuous Petrov Galerkin (DPG) methods are made easily implementable using `broken' test spaces, i.e., spaces of functions with no continuity constraints across mesh element interfaces. Broken spaces derivable from a standard exact sequence of f
Externí odkaz:
http://arxiv.org/abs/1507.05428
Simulation of wave propagation through complex media relies on proper understanding of the properties of numerical methods when the wavenumber is real and complex. Numerical methods of the Hybrid Discontinuous Galerkin (HDG) type are considered for s
Externí odkaz:
http://arxiv.org/abs/1503.06223
Publikováno v:
In Computer Methods in Applied Mechanics and Engineering 1 March 2020 360
This paper presents a duality theorem of the Aubin-Nitsche type for discontinuous Petrov Galerkin (DPG) methods. This explains the numerically observed higher convergence rates in weaker norms. Considering the specific example of the mild-weak (or pr
Externí odkaz:
http://arxiv.org/abs/1408.6599
Autor:
Laha, S., Gopalakrishnan, J., Natarajan, S., Romero de Paz, J., Solana-Madruga, E., Dos Santos-García, A.J., García-Martín, S., Fabelo, O., Morán-Miguélez, E., Sáez-Puche, R.
Publikováno v:
In Journal of Alloys and Compounds 25 October 2019 806:1509-1516
We consider the numerical approximation of the spectrum of a second-order elliptic eigenvalue problem by the hybridizable discontinuous Galerkin (HDG) method. We show for problems with smooth eigenfunctions that the approximate eigenvalues and eigenf
Externí odkaz:
http://arxiv.org/abs/1207.1181
Autor:
Garcia-Flores, A. F., Moreira, A. F. L., Kaneko, U. F., Ardito, F. M., Terashita, H., Orlando, M. T. D., Gopalakrishnan, J., Ramesha, K., Granado, E.
Publikováno v:
Phys. Rev. Lett. 108, 177202 (2012)
A remarkable hardening (~ 30 cm-1) of the normal mode of vibration associated with the symmetric stretching of the oxygen octahedra for the Ba2FeReO6 and Sr2CrReO6 double perovskites is observed below the corresponding magnetic ordering temperatures.
Externí odkaz:
http://arxiv.org/abs/1112.5023