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The prolonged decay of RKKY interactions by interplay of relativistic and non-relativistic electrons in semi-Dirac semimetals

التفاصيل البيبلوغرافية
العنوان: The prolonged decay of RKKY interactions by interplay of relativistic and non-relativistic electrons in semi-Dirac semimetals
المؤلفون: Hou-Jian Duan, Yong-Jia Wu, Yan-Yan Yang, Shi-Han Zheng, Chang-Yong Zhu, Ming-Xun Deng, Mou Yang, Rui-Qiang Wang
المصدر: New Journal of Physics, Vol 24, Iss 3, p 033029 (2022)
بيانات النشر: IOP Publishing, 2022.
سنة النشر: 2022
المجموعة: LCC:Science
LCC:Physics
مصطلحات موضوعية: RKKY interaction, semi-Dirac semimetal, magnetic exchange interaction, Science, Physics, QC1-999
الوصف: The Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction has been extensively explored in isotropic Dirac systems with linear dispersion, which typically follows an exponent decaying rate with the impurity distance R , i.e., J ∝ 1/ R ^d (1/ R ^2 ^d ^−1 ) in d -dimensional systems at finite (zero) Fermi energy. This fast decay makes it rather difficult to be detected and limits its application in spintronics. Here, we theoretically investigate the influence of anisotropic dispersion on the RKKY interaction, and find that the introduction of non-relativistic dispersion in semi-Dirac semimetals (S-DSMs) can significantly prolong the decay of the RKKY interaction and can remarkably enhance the Dzyaloshinskii–Moriya interaction around the relativistic direction. The underlying physics is attributed to the highly increased density of states in the linear-momentum direction as a result of the interplay of relativistic and non-relativistic electrons. Furthermore, we propose a general formula to determine the decaying rate of the RKKY interaction, extending the typical formula for isotropic DSMs. Our results suggest that the S-DSM materials are a powerful platform to detect and control the magnetic exchange interaction, superior to extensively adopted isotropic Dirac systems.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1367-2630
Relation: https://doaj.org/toc/1367-2630
DOI: 10.1088/1367-2630/ac5842
URL الوصول: https://doaj.org/article/1db7e4e254524378bd388842f9a4b9bc
رقم الأكسشن: edsdoj.1db7e4e254524378bd388842f9a4b9bc
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:13672630
DOI:10.1088/1367-2630/ac5842