[18p-Z31-1~19] 17.3 Layered materials

[18p-Z31-4] Study of the contact property between 2H-MoTe₂ and 1T-MoTe₂ induced by laser irradiation in vacuum

〇Tianshun Xie¹, Shuntaro Ikeda¹, Kohei Sakanashi¹, Keiji Ueno², Nobuyuki Aoki¹ (1.Chiba University, 2.Saitama Univ.)

Keywords:MoTe2, laser irradiation, contact property

When 2H-MoTe₂ was irradiated with a laser in vacuum and the irradiated part was analyzed by Raman spectroscopy, the E_2g peak (232 cm^-1) and A_1g peak (171 cm^-1) of the original 2H phase disappeared. It is considered that the crystal changes from 2H (semiconductor phase) to 1T (semimetal phase) due to the generation of new peaks of 155 cm^-1 and 245 cm^-1 that coincide with the Raman peak of the 1T phase. Based on this result, the contact property of 1T-MoTe₂ and 2H-MoTe₂ were investigated.