Electrical contacts to monolayer black phosphorus: A first-principles investigation
Electrical contacts to monolayer black phosphorus: A first-principles investigation
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单层黑磷的电接触:第一性原理研究
DOI:
10.1103/physrevb.90.125441
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发表时间:
2014-09-23
影响因子:
3.7
通讯作者:
Guo, Hong
中科院分区:
文献类型:
--
作者:
Gong, Kui;Zhang, Lei;Guo, Hong
We report first principles theoretical investigations of possible metal contacts to monolayer black phosphorus (BP). By analyzing lattice geometry, five metal surfaces are found to have minimal lattice mismatch with BP: Cu(111), Zn(0001), In(110), Ta(110) and Nb(110). Further studies indicate Ta and Nb bond strongly with monolayer BP causing substantial bond distortions, but the combined Ta-BP and Nb-BP form good metal surfaces to contact a second layer BP. By analyzing the geometry, bonding, electronic structure, charge transfer, potential and band bending, it is concluded that Cu(111) is the best candidate to form excellent Ohmic contact to monolayer BP. Other four metal surfaces or combined surfaces also provide viable structures to form metal/BP contacts, but they have Schottky character.