文献详情
Phonon anomalies and magnetic excitations in BaFe2Se2O
文献类型：期刊
通讯作者：Zhang, QM (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.; Zhang, QM (reprint author), Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China.
期刊名称：PHYSICAL REVIEW B影响因子和分区
年：2019
卷：99
期：14
ISSN：2469-9950
所属部门：物理学系
摘要：We report a temperature- and magnetic-field-dependent Raman-scattering study of the spin-ladder compound BaFe2Se2O. Temperature evolution of the B-1g mode self-energies revealed anomalous behavior at about 100 and 240 K with strong temperature-dependent Fano asymmetry. Furthermore, the A(g) modes integrated intensity exhibits an additional change in tendency at about 50 K. All the observed anomalies can be traced back to spin-phonon interaction contributions as well as multiple magnetic phase tr ...More
We report a temperature- and magnetic-field-dependent Raman-scattering study of the spin-ladder compound BaFe2Se2O. Temperature evolution of the B-1g mode self-energies revealed anomalous behavior at about 100 and 240 K with strong temperature-dependent Fano asymmetry. Furthermore, the A(g) modes integrated intensity exhibits an additional change in tendency at about 50 K. All the observed anomalies can be traced back to spin-phonon interaction contributions as well as multiple magnetic phase transitions present in BaFe2Se2O also detected in the Raman continuum induced by the spin fluctuations. Moreover, the absence of magnetic-field dependence of the magnetic mode observed at 436 cm(-1) and the small linewidth and high intensity are different from the magnetic modes at about 650 cm(-1). This suggests a two-magnon continuum and a two-magnon bound state resonance for this mode. ...Hide

DOI：10.1103/PhysRevB.99.144419
百度学术：Phonon anomalies and magnetic excitations in BaFe2Se2O
语言：外文
人气指数：6
浏览次数：6
基金：National Natural Science Foundation of ChinaNational Natural Science Foundation of China; Ministry of Science and Technology of ChinaMinistry of Science and Technology, China; Fundamental Research Funds for the Central UniversitiesFundamental Research Funds for the Central Universities; Research Funds of Renmin University of China; Serbian Ministry of Education, Science and Technological Development [III45018]; U.S. DOEUnited States Department of Energy (DOE) [DE-SC0012704]
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