【摘 要】
:
The significant role of interfacial coupling on the superconductivity enhancement inFeSe films on SrTiO3 has been widely recognized.But the explicit origination of this coupling isyet to be identified
【机 构】
:
中国科学院物理研究所,北京,100190
论文部分内容阅读
The significant role of interfacial coupling on the superconductivity enhancement inFeSe films on SrTiO3 has been widely recognized.But the explicit origination of this coupling isyet to be identified.Here by surface phonon measurements using high resolution electron energyloss spectroscopy,we found electric field generated by Fuchs-Kliewer(F-K)phonon modes ofSrTiO3 can penetrate into FeSe films and strongly interact with electrons therein.Themode-specific electron-phonon coupling(EPC)constant for the~92 meV F-K phonon is~1.0 inthe single-layer FeSe on SrTiO3.With increasing FeSe thickness,the penetrating field intensitydecays exponentially,which matches well the observed exponential decay of the superconductinggap.It is unambiguously shown that the SrTiO3 F-K phonon penetrating into FeSe is essential inthe interfacial superconductivity enhancement.
其他文献
During the last decade,tremendous research efforts have been focused ontwo-dimensional(2D)materials due to their rich physics and great potentials for manyapplications.Our group is now focusing on ele
Ion hydration is of relevance for a wide range of systems,including electrochemistry,biological environments and atmospheric aerosols.In spite of massive experimental and theoretical efforts,the effec
Surfactant effects have been one of the most important surface techniques to tunesurface properties and growth mode.Based on our first principles studies,we recently discoverednovel effects of Sb enha
In this report,the reduction and removal of surface native oxides(GaOx,AsOx)from the as-received InGaAs surface by using dimethylaluminumhydride(DMAH)-derived AlON and ALD-derived Al2O3 passivation la
原子层厚度的二维原子晶体具有丰富的新奇物理特性,近年来引起了学术界的广泛研究。与块体材料相比,由于二维原子晶体材料的厚度只有单个或少个原子层厚度,因此其表界面物性对材料整体物性,如化学稳定性、电子结构等,起着至关重要的作用[1]。特别是具有不同性质的二维原子晶体构造的垂直异质结更是二维原子晶体物性研究与器件应用中的核心,然而在纳米尺度上对其界面的电学、力学以及热学等物理性质的研究缺乏有效的研究工具
富勒烯具有独特的结构和优异的物化性质,以其为基本单元构筑功能分子器件一直是研究人员关注的热点,其中分子吸附结构与其物化性质进而器件性能密切相关。在本项研究中,我们在Pt 和Cu 电极的(111)表面分别构筑C60 超晶格结构,研究发现C60 分子的排列规律因与衬底间的相互作用的调控而不同,例如,C60 分子在Cu(111)表面上分子取向有序而形成“七分子团簇结构”,这迥异于在Pt(111)表面上分
We report an experimental observation and direct control of quantum transport that is mainly governed by the quantum chaotic dynamics of carrier motion in artificial two-dimensional Au lattices.Given
从认识纳米材料的生长机理着手,以定量化的实验结果揭示了经典气-液-固唯象模型的相平衡主导本质以及以苯作前驱物生长碳纳米管的苯环生长机理[1,2],据此部分实现了对纳米材料生长的预测及调控[。尤其是通过对碳基纳米管的掺杂调控,获得了一系列氮、硼等元素单掺杂及共掺杂的碳基纳米管新材料,通过调变电子结构调控其物理化学性质,应用于燃料电池电极催化,在揭示构效关系、认识无金属氧还原活性起源及作用机制、优化材
FeSe is one of the building block of the Fe-based superconductors with simplest structure.Recently,much enhanced superconductivity in single layer FeSe/SrTiO3(Tc = 65 K or even higher)is discovered,an