2011 Fiscal Year Final Research Report
Nonequilibrium Quantum Electron Transport Properties of Functional Interfaces
Project/Area Number |
22760500
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Physical properties of metals
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Research Institution | Tohoku University |
Principal Investigator |
WANG Zhongchang 東北大学, 原子分子材料科学高等研究機構, 助教 (20510548)
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Project Period (FY) |
2010 – 2011
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Keywords | 界面 / 電子顕微鏡 / 第一原理計算 |
Research Abstract |
The origin of the long-standing contact issue in silicon carbide devices can be understood and technologically manipulated at atomic level. Using advanced transmission electron microscopy, we attributed qualitatively the formation of ohmic contacts to silicon carbide to an epitaxial, coherent, and atomically ordered interface. First principles calculations predict that this interface can trap an atomic layer of carbon and hence enable lowered Schottky barrier and enhanced quantum electron transport. An unprecedented insulator-to-metal transition has been discovered in A-site excess, nonstoichiometric oxides, La_<0. 5> Sr_<n+ 1-0. 5> TinO_<3n+ 1>, which is found to be driven by an insulating SrTiO_3 unit cell. The transition is accompanied by electron localization due to a complex interplay of electrons and phonons, and is unusual as the majority of electrons in the conducting phase are confined to within an atomic layer forming a two-dimensional electron gas.
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Research Products
(38 results)
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[Journal Article] Electrical Conductivity Optimization in Electrolyte-free Fuel Cells by Single-component Ce_<0. 8> Sm_<0. 2> O_<2-δ>-Li_<0. 15> Ni_<0. 45> Zn_<0. 4> Layer2012
Author(s)
Yanjie Xia, Xiaojuan Liu, Yijia Bai, Hongping Li, Xiaolong Deng, Xiaodong Niu, Xiaojie Wu, Defeng Zhou, Minfeng Lv, Zhongchang Wang, Jian Meng
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Journal Title
RSC Advances
Volume: 2
Pages: 3828
Peer Reviewed
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[Journal Article] Electrical Properties Optimization of Calcium Co-doping System : CeO_2-Sm_2O_32012
Author(s)
Yanjie Xia, Xiaojuan Liu, Yijia Bai, Hongping Li, Xiaolong Deng, Xiaodong Niu, Xiaojie Wu, Defeng Zhou, Minfeng Lv, Zhongchang Wang, Jian Meng
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Journal Title
International Journal of Hydrogen Energy
Volume: (In Press)
Peer Reviewed
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[Presentation] Insulating-Layer-Induced Insulator-to-Metal Transition in Ruddlesden-Popper Series2011
Author(s)
Z. C. Wang, M. Saito, S. Tsukimoto, T. Mizoguchi, M. Okude, A. Ohtomo, T. Kita, M. Tsukada, M. Kawasaki, Y. Ikuhara
Organizer
International Workshop on Advanced Electron Microscopy and Applications in Materials Science
Place of Presentation
Shenyang, China
Year and Date
20110711-15
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