Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As
We study a series of LiFe_{1−x}Co_{x}As compounds with different Co concentrations by transport, optical spectroscopy, angle-resolved photoemission spectroscopy, and nuclear magnetic resonance. We observe a Fermi-liquid to non-Fermi-liquid to Fermi-liquid (FL-NFL-FL) crossover alongside a monotonic...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2015-09-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.5.031035 |
| _version_ | 1818730684169060352 |
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| author | Y. M. Dai H. Miao L. Y. Xing X. C. Wang P. S. Wang H. Xiao T. Qian P. Richard X. G. Qiu W. Yu C. Q. Jin Z. Wang P. D. Johnson C. C. Homes H. Ding |
| author_facet | Y. M. Dai H. Miao L. Y. Xing X. C. Wang P. S. Wang H. Xiao T. Qian P. Richard X. G. Qiu W. Yu C. Q. Jin Z. Wang P. D. Johnson C. C. Homes H. Ding |
| author_sort | Y. M. Dai |
| collection | DOAJ |
| description | We study a series of LiFe_{1−x}Co_{x}As compounds with different Co concentrations by transport, optical spectroscopy, angle-resolved photoemission spectroscopy, and nuclear magnetic resonance. We observe 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 find 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 that 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. |
| first_indexed | 2024-12-17T23:05:41Z |
| format | Article |
| id | doaj.art-9fdc8a044cce4f2f814b1d2589be350b |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-17T23:05:41Z |
| publishDate | 2015-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-9fdc8a044cce4f2f814b1d2589be350b2022-12-21T21:29:17ZengAmerican Physical SocietyPhysical Review X2160-33082015-09-015303103510.1103/PhysRevX.5.031035Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}AsY. M. DaiH. MiaoL. Y. XingX. C. WangP. S. WangH. XiaoT. QianP. RichardX. G. QiuW. YuC. Q. JinZ. WangP. D. JohnsonC. C. HomesH. DingWe study a series of LiFe_{1−x}Co_{x}As compounds with different Co concentrations by transport, optical spectroscopy, angle-resolved photoemission spectroscopy, and nuclear magnetic resonance. We observe 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 find 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 that 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.http://doi.org/10.1103/PhysRevX.5.031035 |
| spellingShingle | Y. M. Dai H. Miao L. Y. Xing X. C. Wang P. S. Wang H. Xiao T. Qian P. Richard X. G. Qiu W. Yu C. Q. Jin Z. Wang P. D. Johnson C. C. Homes H. Ding Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As Physical Review X |
| title | Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As |
| title_full | Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As |
| title_fullStr | Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As |
| title_full_unstemmed | Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As |
| title_short | Spin-Fluctuation-Induced Non-Fermi-Liquid Behavior with Suppressed Superconductivity in LiFe_{1−x}Co_{x}As |
| title_sort | spin fluctuation induced non fermi liquid behavior with suppressed superconductivity in life 1 x co x as |
| url | http://doi.org/10.1103/PhysRevX.5.031035 |
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