发表机构
UGC-DAE Consortium for Scientific Research; Indian Institute of Science; Weizmann Institute of Science; Deutsches Elektronen-Synchrotron DESY（UGC-DAE 科学研究联合体; 印度科学学院; 魏茨曼科学研究所; 德国电子同步加速器中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过实验揭示二维反铁磁CrPS4中远高于奈尔温度的自旋-声子-电子强耦合及其界面效应，为异质结构多功能设计提供新途径。
AI 中文摘要
在低维范德华反铁磁体CrPS4中，识别出了一种由短程自旋关联驱动的、强相互耦合的自旋-声子-电子态，其温度远高于TN（约38K）。变温拉曼光谱揭示了自旋-声子耦合持续存在至T*约120K，并伴随局域晶格畸变。光致发光光谱中振动进展的建立表明，在T*附近电子-声子耦合增强。此外，电输运和光电响应也在T*处发生显著变化。结果表明，CrPS4中高于TN的自旋-声子耦合源于短程磁关联诱导的局域晶格畸变，而该畸变又增强了电子-声子相互作用。进一步，利用CrPS4/In2Se3异质结构，我们证明了与CrPS4中耦合自由度相关的异常现象也影响相邻的In2Se3层。In2Se3的晶格动力学在CrPS4的磁异常区间被显著改变，并在T*处观察到耦合动力学。这些界面表现为实现人工设计异质结构中的关联多功能性开辟了新可能性。
英文摘要
A short-range spin correlation driven, strongly intercoupled spin-phonon-electronic state far above TN (~38K) is identified in the low dimensional van der Waals antiferromagnet CrPS4. Temperature-dependent Raman spectroscopy reveals spin-phonon coupling persisting up to T*~120K, concomitant with local lattice distortion. The setting of vibronic progression in photoluminescence spectra suggests the strengthening of electron-phonon coupling around T*. Furthermore, both the electrical transport and optoelectronic response also change significantly at T*. The results indicate that spin-phonon coupling above TN in CrPS4 originates from local lattice distortion induced by short range magnetic correlations which in turn enhances the electron-phonon interaction. Furthermore, using a CrPS4/In2Se3 heterostructure, we demonstrate that the anomaly associated with the coupled degrees of freedom in CrPS4 also influences the adjacent In2Se3 layer. The lattice dynamics of In2Se3 is significantly modified across the magnetic anomaly of CrPS4, and the coupled dynamics is observed at T*. These interfacial manifestation opens up new possibilities for achieving correlated multifunctionalities in artificially designed heterostructure.
