Regulation of the Gap of Gypsum Multilayer Structure and Its Internal Microscopic Mechanism View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2013-2015

FUNDING AMOUNT

240000 CNY

ABSTRACT

Although graphene has great potential in future electric devices, its applications have been blocked by the semi-metal character. Therefore, one of the most important topics in graphene area is how to tune the energy gap. Experimentally, the reported results have shown that the energy gap can be opened by applying electric field on graphene multilayers, but the intrinsic mechanism is not revealed, and the energy gap is too small (the largest energy gap reported in experiments is only 0.25 eV). In this proposal, based on first-principles calculations and tight-binding model, we will study graphene/graphene and two-dimensional porous sheets (PS)/graphene multilayers to address the following issues: 1) The intrinsic mechanism response for the energy-gap opening of graphene/ graphene multilayers under electric field, and predicting the possible ways to improve the energy gap. 2) For [PS]n/[graphene]m/[PS]n (m,n = 1,2) multilayers, we will investigate the band-gap behaviors of graphene. By analysing the different contributions of structures, component, electronic properties, and stacking order, we will explore the intrinsic mechanism of energy-gap modulation under electric field. 3) Based on the revealed mechanism, we will design practicable multilayers structures to improve the energy gap. Through our studies, we wi More... »

URL

http://npd.nsfc.gov.cn/projectDetail.action?pid=21203096

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