Operating principle of an ultra-high vacuum,low-temperature,high-magnetic-field scanning tunneling microscope and its application in graphene quantum dots
Scanning tunneling microscopy(STM)has the ability of atomic-level spatial resolution and in situ detection capability of electronic states,which makes it a commonly used tool for character-izing the surface structure and properties of materials.In particular,STM has played a crucial role in the study of the electrical properties of two-dimensional materials in the past two decades,such as graphene.In this article,the basic principle of STM and the key technologies of ultra-high vacuum,low-temperature,high-magnetic-field scanning tunneling microscopy(UHV-LT-HM-STM)were in-troduced.Taking the properties of graphene quantum dots as an example,we discussed the applica-tion of the UHV-LT-HM-STM in the fabrication of graphene quantum dots,characterization of their electrical properties,and the study of the evolution of quasi-bound states within the quantum dots in-fluenced by the magnetic fields.
NETL
NSTL
万方数据
