تقرير
Momentum dependence of the superconducting gap in NdFeAsO1-xFx single crystals measured by angle resolved photoemission spectroscopy
| العنوان: | Momentum dependence of the superconducting gap in NdFeAsO1-xFx single crystals measured by angle resolved photoemission spectroscopy |
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| المؤلفون: | Kondo, Takeshi, Santander-Syro, A. F., Copie, O., Liu, Chang, Tillman, M. E., Mun, E. D., Schmalian, J., Bud'ko, S. L., Tanatar, M. A., Canfield, P. C., Kaminski, A. |
| المصدر: | Phys. Rev. Lett. 101, 147003 (2008) |
| سنة النشر: | 2008 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | We use angle resolved photoemission spectroscopy (ARPES) to study the momentum dependence of the superconducting gap in NdFeAsO1-xFx single crystals. We find that the Gamma hole pocket is fully gapped below the superconducting transition temperature. The value of the superconducting gap is 15 +- 1.5 meV and its anisotropy around the hole pocket is smaller than 20% of this value. This is consistent with an isotropic or anisotropic s-wave symmetry of the order parameter or exotic d-wave symmetry with nodes located off the Fermi surface sheets. This is a significant departure from the situation in the cuprates, pointing to possibility that the superconductivity in the iron arsenic based system arises from a different mechanism. Comment: 4 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.101.147003 |
| URL الوصول: | http://arxiv.org/abs/0807.0815 |
| رقم الأكسشن: | edsarx.0807.0815 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.101.147003 |
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