标题： 二维范德瓦尔斯反铁磁体中的全电近场激子注入 显示英文标题

标题： All-electrical near-field injection of excitons in a van der Waals antiferromagnet

摘要： 范德瓦尔斯材料已成为未来电子学和光子学的有前景的构建模块。二维磁性材料CrSBr因其反铁磁序、强光物质耦合以及不寻常的一维电子能带结构的独特组合而成为固体研究领域的焦点。本研究报道了从低温到室温条件下，在CrSBr层中的激子的电激发。通过利用石墨烯隧道结中隧穿电子的能量传递，可以在邻近的CrSBr层中激发强束缚激子。这使得从双层到250纳米厚的CrSBr晶体中都能实现电激发发射，其中电致发光的强线性偏振证实了激子的起源。对于较厚的层，观察到了来自自杂化激子极化子的电激发发射的明确证据，突显了CrSBr中光学激发与受限光子模式之间强烈的耦合。这些结果为自旋电子学和磁性属性的光学读出的未来应用铺平了道路。 显示英文摘要

摘要： Van der Waals materials have become a promising building block for future electronics and photonics. The two-dimensional magnet CrSBr came into the spotlight of solid state research due to its intriguing combination of antiferromagnetic order, strong light-matter coupling and unusual quasi-1D electronic bandstructure. This study reports the electrical excitation of excitons in CrSBr layers from cryogenic temperatures up to room temperature. By exploiting the energy transfer via tunneling electrons in a graphene tunnel junction strongly bound excitons are excited in proximate CrSBr layers. This facilitates electrically-excited emission from CrSBr crystals ranging in thickness from a bilayer up to 250 nm, in which the strong linear polarization of the electroluminescence confirms the excitonic origin. For thicker layers, clear evidence for the electrically excited emission from self-hybridized exciton polaritons is observed, highlighting the strong coupling between optical excitations and confined photon modes in CrSBr. These results pave the way for future applications in spintronic and optical readout of magnetic properties.