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Title: First principle study of Si and Ge band structure for UTB MOSFETs applications
Authors: Low, T.
Feng, Y.P. 
Li, M.F. 
Samudra, G. 
Yeo, Y.C. 
Bai, P.
Chan, L.
Kwong, D.L.
Issue Date: 2005
Citation: Low, T.,Feng, Y.P.,Li, M.F.,Samudra, G.,Yeo, Y.C.,Bai, P.,Chan, L.,Kwong, D.L. (2005). First principle study of Si and Ge band structure for UTB MOSFETs applications. 2005 International Semiconductor Device Research Symposium 2005 : 358-359. ScholarBank@NUS Repository.
Abstract: Ab initio study of the band structures of Si and Ge thin film is conducted for all common surface orientations with film thickness ranging from 4nm to Inm. The ab initio calculation predicts features not captured by the conventional effective mass approximation such as the deviation from isotropic energy dispersion for one of the two-fold degenerate Δ valleys at G for Ge〈100〉 and shifting of Δ valley minima towards G as film thickness decreases for Ge〈110〉.It also offers more reliable insights into the problem of L and Δ valleys competition for carrier occupation in Ge〈100〉 and Ge〈110〉. Our study predicts that Ge thin film band structure at 〈110〉 surface with [110] channel direction has the highest average hole/electron carrier velocity down to a body thickness of 1nm, making it a promising candidate for aggressively scaled UTB MOSFETs. © 2005 IEEE.
Source Title: 2005 International Semiconductor Device Research Symposium
ISBN: 1424400848
Appears in Collections:Staff Publications

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