| Autor: |
Wei, Bao, Y, Qiu, Q, Huang, M A, Green, P, Zajdel, M R, Fitzsimmons, M, Zhernenkov, S, Chang, Minghu, Fang, B, Qian, E K, Vehstedt, Jinhu, Yang, H M, Pham, L, Spinu, Z Q, Mao |
| Rok vydání: |
2008 |
| Zdroj: |
Physical review letters. 102(24) |
| ISSN: |
0031-9007 |
| Popis: |
The new alpha-Fe(Te,Se) superconductors share the common iron building block and ferminology with the LaFeAsO and BaFe(2)As(2) families of superconductors. In contrast with the predicted commensurate spin-density-wave order at the nesting wave vector (pi, 0), a completely different magnetic order with a composition tunable propagation vector (deltapi, deltapi) was determined for the parent compound Fe_{1+y}Te in this powder and single-crystal neutron diffraction study. The new antiferromagnetic order survives as a short-range one even in the highest T_{C} sample. An alternative to the prevailing nesting Fermi surface mechanism is required to understand the latest family of ferrous superconductors. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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