Effective mass (m*) is defined as: where x, y, z are the directions in the reciprocal Cartesian space (2π/A), En(k) is the dispersion relation for the n-th electronic band. The explicit form of the ...

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The Wilson Center’s prestigious Latin America Program provides non-partisan expertise to a broad community of decision makers in the United States and Latin America on critical policy issues facing ...

Abstract: Anticipating the arrival of high-frequency era, the author has been promoting the development of new technology to complement the communication systems from early stages. In this paper, an ...