Tang Jiacheng, Singh Arjan, Brennan Nicholas J, Chica Daniel G, Li Yi, Roy Xavier, Rana Farhan, Bae Youn Jue
Department of Chemistry, Cornell University, Ithaca, New York 14850, United States.
School of Electrical and Computer Engineering, Cornell University, Ithaca, New York 14853, United States.
Nano Lett. 2025 Jul 9;25(27):10912-10918. doi: 10.1021/acs.nanolett.5c02314. Epub 2025 Jun 30.
Magnon-based hybrid quantum systems are promising candidates for quantum interconnects and quantum sensors, and they offer a rich platform for exploring nonlinear magnonics and cavity-photon interactions. Two-dimensional (2D) van der Waals magnets provide a compact, atomically flat geometry that can be easily integrated into existing quantum circuits, such as superconducting resonators and qubits. Among various 2D magnets, the magnetic semiconductor CrSBr is particularly unique due to its strong spin-exciton, spin-lattice, and magnon-exciton interactions. In this work, we demonstrate coherent coupling between antiferromagnetic (AFM) magnons in CrSBr and microwave photons in a niobium-(Nb)-based-on-chip resonator. We tuned the magnon-photon coupling strength by changing the number of CrSBr flakes integrated into the Nb microwave photon resonators. This work demonstrates the first step toward integrating layered van der Waals 2D magnets into superconducting microwave circuits, with full access for microwave and optical probing.
基于磁振子的混合量子系统是量子互连和量子传感器的有前途的候选者，它们为探索非线性磁振子学和腔光子相互作用提供了一个丰富的平台。二维（2D）范德华磁体提供了一种紧凑的、原子级平整的几何结构，可以很容易地集成到现有的量子电路中，如超导谐振器和量子比特。在各种二维磁体中，磁性半导体CrSBr因其强自旋激子、自旋晶格和磁振子激子相互作用而特别独特。在这项工作中，我们展示了CrSBr中的反铁磁（AFM）磁振子与基于铌（Nb）的片上谐振器中的微波光子之间的相干耦合。我们通过改变集成到Nb微波光子谐振器中的CrSBr薄片数量来调整磁振子-光子耦合强度。这项工作展示了将层状范德华二维磁体集成到超导微波电路中的第一步，实现了微波和光学探测的全面接入。
