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Studies from Peking University Provide New Data on Low Dimensional Structures

May 13, 2014

By a News Reporter-Staff News Editor at Physics Week -- Investigators publish new report on Low Dimensional Structures. According to news reporting from Beijing, People's Republic of China, by VerticalNews journalists, research stated, "Opening a sizable band gap in the zero-gap germanene without heavy loss of carrier mobility is a key issue for its application in nanoelectronic devices such as high-performance field effect transistors (FETs) operating at room temperature. Using the first-principles calculations, we find a band gap is opened at the Dirac point in germanene by single-side adsorption of alkali metal (AM) atoms."

The news correspondents obtained a quote from the research from Peking University, "This band gap is tunable by varying, the coverage and the species of AM atoms, ranging from 0.02 to 0.31 eV, and the maximum global band gap is 0.26 eV. Since the effective masses of electrons and holes in germanene near the Dirac point after surface adsorption (ranging from 0.005 to 0.106m(e)) are small, the carrier mobility is expected not to degrade much."

According to the news reporters, the research concluded: "Therefore germanene is a potential candidate of effective FET channel operating at room temperature upon surface adsorption."

For more information on this research see: Tunable band gap in germanene by surface adsorption. Physica E-Low-Dimensional Systems & Nanostructures, 2014;59():60-65. Physica E-Low-Dimensional Systems & Nanostructures can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

Our news journalists report that additional information may be obtained by contacting M. Ye, Peking University, Academy Adv Interdisciplinary Studies, Beijing 100871, PR, People's Republic of China. Additional authors for this research include R. Quhe, J.X. Zheng, Z.Y. Ni, Y.Y. Wang, Y.K. Yuan, G. Tse, J.J. Shi, Z.X. Gao and J. Lu.

Keywords for this news article include: Asia, Beijing, People's Republic of China, Low Dimensional Structures

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Source: Physics Week

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