基于实验结果的非传统轨道电子学观点
Orbitronics: orbit-spin interconversions for long range orbital propagation enabled by spin current
AI总结:
研究通过铁磁共振和热梯度在Ni/(Pt)Ti/Au异质结构中生成角动量,发现轨道极化和轨道-自旋转换具有局部特性,而非长程轨道电流传输。
摘要:
新兴的轨道电子学假设长程轨道电流传输,类似于自旋电流。然而,近期的理论和实验挑战这一观点,显示轨道极化和轨道-自旋转换具有局部特性。我们研究了铁磁共振和热梯度在Ni/(Pt)Ti/Au异质结构中生成的角动量。观察到的电荷电流与Ti厚度无关,最多60nm,与Ti中的轨道传输不兼容。其大小取决于Ti的两个界面,证明了在局部轨道-自旋转换前后介导的自旋传输。
英文摘要:
Orbitronics assumes long-range orbital currents, like spin currents in spintronics. However, recent theories and experiments challenge this view, showing rather local characters for orbital polarization and importance of orbit-spin conversions. In our work, angular momentum is created by ferromagnetic resonance or thermal gradients in Ni/(Pt)Ti/Au heterostructures and detected by conversion to charge current. The observed charge currents are independent of Ti thickness up to 60 nm, which is incompatible with orbital transport and Orbital Hall Effect in Ti. Instead, they depend on both Ti interfaces, evidencing spin-mediated transport in between after and before local orbit-spin interconversions.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。