Topological Fermi-arc surface state covered by floating electrons on a two-dimensional electride

Two-dimensional electrides can acquire topologically non-trivial phases due to intriguing interplay between the cationic atomic layers and anionic electron layers. However, experimental evidence of topological surface states has yet to be verified. Here, via angle-resolved photoemission spectroscopy (ARPES) and scanning tunnelling microscopy (STM), we probe the magnetic Weyl states of the ferromagnetic electride $[G d_{2}$ C]^{2+}\cdot2e^{-} $. I n p a r t i c u l a r, t h e p r e s e n c e o f W e y l c o n e s a n d F e r m i - a r c s t a t e s i s d e m o n s t r a t e d t h r o u g h p h o t o n e n e r g y - d e p e n d e n t A R P E S m e a s u r e m e n t s, a g r e e i n g w i t h t h e o r e t i c a l b a n d s t r u c t u r e c a l c u l a t i o n s . N o t a b l y, t h e S T M m e a s u r e m e n t s r e v e a l t h a t t h e F e r m i - a r c s t a t e s e x i s t u n d e r n e a t h a f l o a t i n g q u a n t u m e l e c t r o n l i q u i d o n t h e t o p G d l a y e r, f o r m i n g d o u b l e - s t a c k e d s u r f a c e s t a t e s i n a h e t e r o s t r u c t u r e . O u r w o r k t h u s n o t o n l y u n v e i l s t h e n o n - t r i v i a l t o p o l o g y o f t h e$ [Gd_{2} $C]^{2 +} \cdot 2 e^{-}$ electride but also realizes a surface heterostructure that can host phenomena distinct from the bulk.

Topological Fermi-arc surface state covered by floating electrons on a two-dimensional electride

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Topological Fermi-arc surface state covered by floating electrons on a two-dimensional electride

文献摘要

讨论

讲解博客

AI智能校验

Topological Fermi-arc surface state covered by floating electrons on a two-dimensional electride

文献摘要

讨论

|讲解博客

|AI智能校验

Topological Fermi-arc surface state covered by floating electrons on a two-dimensional electride

文献摘要

讨论

|讲解博客

|AI智能校验

讲解博客

AI智能校验

讲解博客

AI智能校验