Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Sofo, J. O."'
The discovery of fullerenes has stimulated extensive exploration of the resulting behavior of adsorbed films. Our study addresses the planar substrates graphene-fluoride (GF) and graphane (GH) in comparison to graphene. We present initial results con
Externí odkaz:
http://arxiv.org/abs/1204.3061
Autor:
Sofo, J. O., Usaj, Gonzalo, Cornaglia, P. S., Suarez, A. M., Hernández-Nieves, A. D., Balseiro, C. A.
Publikováno v:
Phys. Rev. B 85, 115405 (2012)
Using density functional theory (DFT), Hartree-Fock, exact diagonalization, and numerical renormalization group methods we study the electronic structure of diluted hydrogen atoms chemisorbed on graphene. A comparison between DFT and Hartree-Fock cal
Externí odkaz:
http://arxiv.org/abs/1112.2529
Autor:
Sofo, J. O., Suarez, A. M., Usaj, Gonzalo, Cornaglia, P. S., Hernández-Nieves, A. D., Balseiro, C. A.
Publikováno v:
Phys. Rev. B 83, 081411(R) (2011)
We study the electronic structure of diluted F atoms chemisorbed on graphene using density functional theory calculations. We show that the nature of the chemical bonding of a F atom adsorbed on top of a C atom in graphene strongly depends on carrier
Externí odkaz:
http://arxiv.org/abs/1101.4600
Autor:
Cheng, S. -H., Zou, K., Okino, F., Gutierrez, H. R., Gupta, A., Shen, N., Eklund, P. C., Sofo, J. O., Zhu, J.
Publikováno v:
Phys. Rev. B 81, 205435 (2010)
We report the synthesis and evidence of graphene fluoride, a two-dimensional wide bandgap semiconductor derived from graphene. Graphene fluoride exhibits hexagonal crystalline order and strongly insulating behavior with resistance exceeding 10 G$\Ome
Externí odkaz:
http://arxiv.org/abs/1005.0113
Autor:
Ambrosch-Draxl, C., Sofo, J. O.
We present a scheme for the calculation of linear optical properties by the all-electron full-potential linearized augmented planewave (LAPW) method. A summary of the theoretical background for the derivation of the dielectric tensor within the rando
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402523
First principles density functional calculations within the local spin density approximation (LSDA) and the generalized gradient approximation (GGA) are reported for pyrochlore Cd$_2$Os$_2$O$_7$ and Cd$_{2}$Re$_{2}$O$_7$. The transition metal $t_{2g}
Externí odkaz:
http://arxiv.org/abs/cond-mat/0108226
Publikováno v:
Phys. Rev. B 64, 092414 (2001)
We construct an effective Hamiltonian for the motion of electrons among the transition metal ions of ordered double perovskites like Sr2FeMoO6. in which strong intra-atomic Coulomb repulsion U is present in only one of the inequivalent transition met
Externí odkaz:
http://arxiv.org/abs/cond-mat/0105566
Publikováno v:
J. Phys. Soc. Jpn. 71, 2271 (2002).
We have studied the electronic structure of the skutterudite compounds Co(Sb$_{1-x}$Te$_{x}$)$_3$ (x= 0, 0.02, 0.04) by photoemission spectroscopy. Valence-band spectra revealed that Sb 5p states are dominant near the Fermi level and are hybridized w
Externí odkaz:
http://arxiv.org/abs/cond-mat/0103342
Autor:
Sofo, J. O., Mahan, G. D.
Opals are structures composed of the closed packing of spheres in the size range of nano-to-micro meter. They are sintered to create small necks at the points of contact. We have solved the diffusion problem in such structures. The relation between t
Externí odkaz:
http://arxiv.org/abs/cond-mat/9910344
A new method of refrigeration is proposed. Cooling is obtained by thermionic emission of electrons over periodic barriers in a multilayer geometry. These could be either Schottky barriers between metals and semiconductors or else barriers in a semico
Externí odkaz:
http://arxiv.org/abs/cond-mat/9801187