تقرير
Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with suppressed superconductivity in LiFe$_{1-x}$Co$_{x}$As
| العنوان: | Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with suppressed superconductivity in LiFe$_{1-x}$Co$_{x}$As |
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| المؤلفون: | Dai, Y. M., Miao, H., Xing, L. Y., Wang, X. C., Wang, P. S., Xiao, H., Qian, T., Richard, P., Qiu, X. G., Yu, W., Jin, C. Q., Wang, Z., Johnson, P. D., Homes, C. C., Ding, H. |
| المصدر: | Phys. Rev. X 5, 031035 (2015) |
| سنة النشر: | 2015 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | A series of LiFe$_{1-x}$Co$_{x}$As compounds with different Co concentrations have been studied by transport, optical spectroscopy, angle-resolved photoemission spectroscopy and nuclear magnetic resonance. We observed a Fermi liquid to non-Fermi liquid to Fermi liquid (FL-NFL-FL) crossover alongside a monotonic suppression of the superconductivity with increasing Co content. In parallel to the FL-NFL-FL crossover, we found that both the low-energy spin fluctuations and Fermi surface nesting are enhanced and then diminished, strongly suggesting that the NFL behavior in LiFe$_{1-x}$Co$_{x}$As is induced by low-energy spin fluctuations which are very likely tuned by Fermi surface nesting. Our study reveals a unique phase diagram of LiFe$_{1-x}$Co$_{x}$As where the region of NFL is moved to the boundary of the superconducting phase, implying that they are probably governed by different mechanisms. Comment: 10 pages, 11 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevX.5.031035 |
| URL الوصول: | http://arxiv.org/abs/1505.00455 |
| رقم الأكسشن: | edsarx.1505.00455 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevX.5.031035 |
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