Report
Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe0.55Se0.45
| العنوان: | Isotropic superconducting gaps with enhanced pairing on electron Fermi surfaces in FeTe0.55Se0.45 |
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| المؤلفون: | Miao, H., Richard, P., Tanaka, Y., Nakayama, K., Qian, T., Umezawa, K., Sato, T., Xu, Y. -M., Shi, Y. -B., Xu, N., Wang, X. -P., Zhang, P., Yang, H. -B., Xu, Z. -J., Wen, J. S., Gu, G. -D., Dai, X., Hu, J. -P., Takahashi, T., Ding, H. |
| المصدر: | Physical Review B 85, 094506 (2012) |
| سنة النشر: | 2011 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | The momentum distribution of the energy gap opening at the Fermi level of superconductors is a direct fingerprint of the pairing mechanism. While the phase diagram of the iron-based superconductors promotes antiferromagnetic fluctuations as a natural candidate for electron pairing, the precise origin of the interaction is highly debated. We used angle-resolved photoemission spectroscopy to reveal directly the momentum distribution of the superconducting gap in FeTe1-xSex, which has the simplest structure of all iron-based superconductors. We found isotropic superconducting gaps on all Fermi surfaces whose sizes can be fitted by a single gap function derived from a strong coupling approach, strongly suggesting local antiferromagnetic exchange interactions as the pairing origin. Comment: 15 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.85.094506 |
| URL الوصول: | http://arxiv.org/abs/1107.0985 |
| رقم الانضمام: | edsarx.1107.0985 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.85.094506 |
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