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Zinc-blende 구조를 가진 CrS(001) 표면에서의 반쪽금속성과 자성에 대한 제일원리 연구
변영신, 이재일, Byun. Y.S., Lee. J.I. 한국자기학회 韓國磁氣學會誌 4 Pages
한국자기학회 韓國磁氣學會誌 2005, Vol.15 No.5 257-260 (4 pages)
Zinc-blende 구조를 가진 CrS(001) 표면에서의 반쪽금속성과 자성을 제일원리 방법을 이용하여 연구하였다. 이를 위해 (001)면에서 서로 다른 두 개의 원자로 끝나는 면, 즉 Cr원자로 끝나는 (001) 표면(Cr-Term)과 S원자로 끝나는 (001) 표면(S-Term)계의 전자구조를 총 퍼텐셜 선형보강평면파동(FLAPW) 에너지띠 방법을 이용하여 계산하였다. 계산된 상태밀도로부터 Cr-Term과 S-Term계 모두 그 표면에서 반쪽금속성이 유지됨을 알았다 Cr-Term계의 표면 Cr원자의 자기모멘트는 덩치상태($3.61;{mu}_B$)에 비해 상당히 큰... -
Physics-Based SPICE Model of a-InGaZnO Thin-Film Transistor Using Verilog-A
Jeon. Yong-Woo, Hur. In-Seok, Kim. Yong-Sik, Bae. Min-Kyung, Jung. Hyun-Kwang, Kong. Dong-Sik, Kim. Woo-Joon, Kim. Jae-Hyeong, Jang. Jae 대한전자공학회 Journal of semiconductor technology and science 9 Pages
대한전자공학회 Journal of semiconductor technology and science 2011, Vol.11 No.3 153-161 (9 pages)
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Mechanisms of Na adsorption on graphene and graphene oxide: density functional theory approach
Hye Sook Moon, Ji Hye Lee, Soonchul Kwon, Il Tae Kim, Seung Geol Lee 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.2 7 116-120 (5 pages)
to be stronger than the adsorption of Na on pristine graphene. However, the adsorption of Na on graphene oxide-hydroxyl resulted in the generation of NaOH as a by-product. Using density of states (DOS) calculations, we found that the DOS of the Na-adsorbed graphene was shifted down more than that of the Na-adsorbed graphene oxide-epoxide. In addition, the intensity of the DOS around the Fermi level for the Na-adsorbed graphene was higher than that for the Na-adsorbed graphene oxide-epoxide. -
(CrAs)3(MnAs)3(110) 초격자의 전자구조와 자성에 대한 제일원리 연구
이재일, 홍순철, Lee. J.I., Hong. S.C. 한국자기학회 韓國磁氣學會誌 4 Pages
한국자기학회 韓國磁氣學會誌 2006, Vol.16 No.2 111-114 (4 pages)
Zinc-blonde 구조를 가지는 CrAs와 MnAs에서 (110)면 원자층으로 이루어진 초격자의 자성을 제일원리 방법을 이용하여 연구하였다. 이를 위해 CrAs와 MnAs의 (110)층이 각기 세 층씩 교대로 반복되는 $(CrAs)_3(MnAs)_3(110)$ 초격자계의 전자구조를 총 퍼텐셜 선형보강평면파동(FLAPW) 에너지띠 방법을 이용하여 계산하였다. Cr-As로 이루어진 층과 Mn-As로 이루어진 층이 접합되는 계면에 있는 Cr과 Mn원자의 자기모멘트를 계산한 결과 각기 $3.07;mu_B$와 $3.74;mu_B$로 가운데 층의 Cr과 Mn의 자기모멘트 값인 $3.06;mu_B$와... -
Effect of nitrogen doping and hydrogen confinement on the electronic properties of a single walled carbon nanotube
Bashir Mohi Ud Din Bhat, Jehangir Rashid Dar, Pratima Sen 한국탄소학회 Carbon Letters 4 Pages
한국탄소학회 Carbon Letters 2016, Vol.17 No.1 4 29-32 (4 pages)
This paper addresses the effect of dopants on the electronic properties of zigzag (8, 0) semiconducting single walled carbon nanotubes (SWCNTs), using extended H?ckel theory combined with nonequilibrium Green’s function formalism. Through appropriate dopant concentrations, the electronic properties of SWCNTs can be modified. Within this context, we present our ongoing investigation on (8, 0) SWCNTs doped with nitrogen. Quantum confinement effects on the electronic properties of the SWCNTs have... -
Research Articles : Responses of Guava Plants to Inoculation with Arbuscular Mycorrhizal Fungi in Soil Infested with Meloidogyne enterolobii
한국식물병리학회 The Plant Pathology Journal 7 Pages
한국식물병리학회 The Plant Pathology Journal 2013, 29권 3호 3 242-248 (7 pages)
In the Northeast of Brazil, expansion of guava crops has been impaired by Meloidogyne enterolobii that causes root galls, leaf fall and plant death. Considering the fact that arbuscular mycorrhizal Fungi (AMF) improve plant growth giving protection against damages by plant pathogens, this work was carried out to select AMF efficient to increase production of guava seedlings and their tolerance to M. enterolobii. Seedlings of guava were inoculated with 200 spores of Gigaspora albida, Glomus... -
Contact resistance in graphene channel transistors
Seung Min Song, Byung Jin Cho 한국탄소학회 Carbon Letters 9 Pages
한국탄소학회 Carbon Letters 2013, Vol.14 No.3 4 162-170 (9 pages)
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Measuring the Environment for Physical Activity in Early Childhood: A Narrative and Systematic Literature Review
Fabiano Camara, Stephen Berg, Brent Bradford, Sarah Hutchinson, Amanda Sardeli 환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 28 Pages
환태평양유아교육연구학회 Asia-Pacific journal of research in early childhood education 2022, Vol.16 No.2 8 159-186 (28 pages)
The aim of this study was to systematically review the protocols to assess the built environment in the context of early childhood and physical activity. Three databases were systematically searched for studies that examined associations between the built environment and preschoolers’ physical activity levels. A total of 27 studies were included in the analysis. Results show a clear distinction between approaches administered in the neighborhoods and childcare domains. Although Geographic...
