2016-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/695248摘要：近年新興之晶體材料可藉自旋-軌道耦合形成特殊電子特性，有利於發展全電控自旋極化及低能耗自旋流。本計劃透過掃瞄穿隧電子顯微術(STM)及其能譜，輔以同步輻射相關之量測以及第一原理計算，研究新興晶體之基礎性質，如自旋依賴電子能帶的色散性，進而設計自旋電子元件以分析其自旋傳輸特性。我們也將利用最近剛發展的準粒子干涉掃瞄穿隧電子顯微術，補強角分辨光電子能譜技術並進一步具象化晶體表面載子之色散性，對於了解二維材料中諸如相對論效應及自旋-軌道耦合效應之重要物理特性極具突破性。STM及自旋極化STM則可進一步解析原子或分子吸附後於晶體表面引起之電性及磁性效應。藉由前述理論及微觀性質研究以及宏觀自旋傳輸行為的探討，本計畫也將進一步發展以新穎晶體材料之異質結構為基礎的新一代全電控／非磁性類平面化的新穎自旋電子元件。 <br> Abstract: The continuing emergence of crystals exhibiting exotic spin-orbit-driven electronic phenomena offers great potential for all-electric control of spin polarization and dissipationless spin currents. Our aim is to understand the spin-dependent dispersion and transport properties of such emergent materials utilizing a multi-tool approach of microscopic and spectroscopic characterization using scanning tunneling microscopy (STM), with supporting synchrotron-based measurements and ab initio calculations, as well as spin-dependent transport measurements. Newly developed STM methods termed quasi-particle interference (QPI) measurements, will be used to visualize the dispersion of surface carriers, and are both competitive and complementary with new nano-scale angle-resolved photoemission methods. STM and spin-polarized STM measurements will also be used to investigate phenomena arising from doping and adsorbates including magnetic adatoms and molecules, which have potential for new applications in all-electrically controlled or non-magnetic spintronics. The ultimate purpose of these theoretical and microscopic investigations is to guide the design and realization of new heterostructures incorporating emergent materials. These will be fabricated in order to investigate their macroscopic spin transport behavior, with a view to incorporating them into a new generation of planar-geometry spintronic devices for all-electric control of spin.尖端晶體材料晶體生長自旋 - 軌道相互作用拉什巴效果拓撲材料掃描隧道顯微鏡掃描隧道光譜X射線顯微鏡X射線光電子能譜儀準粒子的干擾密度泛函理論從頭電子結構建模平面器件無耗散自旋Emergent crystalline materialscrystal growthspin-orbit interactionRashba effecttopological materialsscanning tunneling microscopyscanning tunneling spectroscopyx-ray microscopyx-ray photo-electron spectroscopyquasi-particle interference,