| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403117 |
| ISSN: | 0103-9733 |
| Authors: | Ujevic, Sebastian1 Gomez, J.A1 Larkin, Ivan A1 |
| Institutions: | 1Universidade de Brasilia, Centro Internacional de Fisica da Materia Condensada, Brasilia, Distrito Federal. Brasil |
| Year: | 2009 |
| Season: | Abr |
| Volumen: | 39 |
| Number: | 1A |
| Pages: | 242-247 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | In this work we studied the behavior of multi-channel tunneling through a realistic Fe/MgO/Fe hetero-junction ab initio potential. For this purpose we obtained Fe/MgO/Fe(001) hetero-junction effective potentials using the full potential-linear augmented plane wave WIEN2k code together with the generalized gradient approximation for the exchange-correlation potential. Multi-channel tunneling through the Fe/MgO/Fe hetero-junction barrier was studied within a few modes model. The transfer matrix technique was used to calculate the transmission and reflection amplitudes between Bloch states in the semi-infinite leads. The transmission coefficients were used in Fisher and Lee formula for conductance, an expression derived from Kubo formula and valid for any number of scattering channels |
| Disciplines: | Física y astronomía, Matemáticas |
| Keyword: | Física de materia condensada, Matemáticas aplicadas, Ferromagnetismo, Efecto de magnetorresistencia túnel, Matrices |
| Keyword: | Physics and astronomy, Mathematics, Condensed matter physics, Applied mathematics, Ferromagnetism, Tunnel magnetoresistance effect, Matrix |
| Full text: | Texto completo (Ver PDF) |
