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Evidence of antiferromagnetic fluctuation in the unconventional superconductor lambda-(BETS)(2)GaCl4 by C-13 NMR

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/67326

Title: Evidence of antiferromagnetic fluctuation in the unconventional superconductor lambda-(BETS)(2)GaCl4 by C-13 NMR
Authors: Kobayashi, T. Browse this author
Kawamoto, A. Browse this author →KAKEN DB
Issue Date: 8-Sep-2017
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 96
Issue: 12
Start Page: 125115-1
End Page: 125115-5
Publisher DOI: 10.1103/PhysRevB.96.125115
Abstract: We performed C-13 NMR measurements on the unconventional organic superconductor lambda-(BETS)(2)GaCl4 to clarify its electronic properties in the paramagnetic state. We found that the spin-lattice relaxation rate divided by temperature 1/T1T shows Curie-like enhancement above 55 K that arises from an antiferromagnetic fluctuation. In addition, we found additional enhancement of 1/T1T below 10 K, where the Knight shift decreases and the linewidth of NMR spectra is broadened. The result could be understood by the magnetic fluctuation induced by the nesting of the Fermi surface. We discovered that lambda-(BETS)(2)GaCl4 salt inherently exhibits the two different types of magnetic fluctuations.
Rights: ©2017 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/67326
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 河本 充司

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