The geometries and electronic properties of SnSe/metal contact have been investigated using first-principles calcula- tion. It is found that the geometries of monolayer SnSe were affected slightly when SnSe adsorbs on...The geometries and electronic properties of SnSe/metal contact have been investigated using first-principles calcula- tion. It is found that the geometries of monolayer SnSe were affected slightly when SnSe adsorbs on M （M = Ag,Au,Ta） substrate. Compared with the corresponding free-standing monolayer SnSe, the adsorbed SnSe undergoes a semiconductor- to-metal transition. The potential difference AV indicates that SnSefra contact is the best candidate for the Schottky contact of the three SnSe/M contacts. Two types of current-in-plane （CIP） structure, where a freestanding monolayer SnSe is con- nected to SnSe/M, are identified as the n-type CIP structure in SnSe/Ag contact and p-type CIP structure in SnSe/Au and SnSe/Ta contact. The results can stimulate further investigation for the multifunctional SnSe/metal contact.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.U1304518 and U1404109)
文摘The geometries and electronic properties of SnSe/metal contact have been investigated using first-principles calcula- tion. It is found that the geometries of monolayer SnSe were affected slightly when SnSe adsorbs on M （M = Ag,Au,Ta） substrate. Compared with the corresponding free-standing monolayer SnSe, the adsorbed SnSe undergoes a semiconductor- to-metal transition. The potential difference AV indicates that SnSefra contact is the best candidate for the Schottky contact of the three SnSe/M contacts. Two types of current-in-plane （CIP） structure, where a freestanding monolayer SnSe is con- nected to SnSe/M, are identified as the n-type CIP structure in SnSe/Ag contact and p-type CIP structure in SnSe/Au and SnSe/Ta contact. The results can stimulate further investigation for the multifunctional SnSe/metal contact.
