[15p-P15-1~8] 6.5 Surface Physics, Vacuum

[15p-P15-1] Atomic-Structure Analysis of Lanthanum Hexaboride (100) Surface

Takamura Masaru¹, Kurachi Yuki², Kubo Naoya¹, Asai Hirotaka², Murata Hidekazu², 〇Eiji Rokuta², Nakagawa Takeshi¹, Mizuno Seigi¹, Otani Shigeki³ (1.Kyushu Univ., 2.Meijo Univ., 3.NIMS)

Keywords:surface, lanthanum hexaboride

Atomic strucures of lanthanum hexaboride (LaB₆) (100) surface was analyzed with LEED-IV measurement, where IV curves of six different sets of equivalent diffraction spots were measured and reproduced by optimizing surface relaxation. As a result, we found that the outermost La atoms are displaced from the position of the ideal suraface by approximately 0.03 nm, while the covalent framework of boron atoms is far less deformed. These characteristics are quite consistent with results of previous theoretical studies.