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Dive into the research topics where Emmanuel Nenghabi is active.

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Featured researches published by Emmanuel Nenghabi.


Inorganic Chemistry | 2010

Framework Contraction in Na-Stuffed Si(cF136)

Matt Beekman; Emmanuel Nenghabi; Koushik Biswas; Charles W. Myles; Michael Baitinger; Yuri Grin; George S. Nolas

Systematic crystal structure refinements from powder X-ray diffraction data as well as density functional theory calculations demonstrate that the silicon clathrate II Si(cF136) exhibits a lattice contraction as Na is introduced solely into the Si(28) cages. When the Si(20) cages, in addition, begin to be filled with Na, a contrasting lattice expansion results. The nonmonotonic structural response to filling is an indication of markedly dissimilar guest-framework interactions for Na@Si(20) and Na@Si(28).


Physical Review B | 2008

First principles calculations of the structural and electronic properties of the type-I semiconductor clathrate alloysBa8Ga16SixGe30−xandSr8Ga16SixGe30−x

Emmanuel Nenghabi; Charles W. Myles


Journal of Physics: Condensed Matter | 2008

First principles calculations of the structural, electronic and vibrational properties of the clathrates Ba8Al16Ge30 and Ba8Al16Si30

Emmanuel Nenghabi; Charles W. Myles


Physical Review B | 2008

First-principles calculations of the vibrational and thermal properties of the type-I clathrates Ba 8 Ga 16 Si x Ge 30 − x and Sr 8 Ga 16 Si x Ge 30 − x

Emmanuel Nenghabi; Charles W. Myles


Physica B-condensed Matter | 2007

Rattling ''guest'' impurities in Si and Ge clathrate semiconductors

Charles W. Myles; Koushik Biswas; Emmanuel Nenghabi


Archive | 2011

Structural, Electronic and Vibrational Properties of NaxSi136 (0 < x < 24) Clathrates

Craig Higgins; Emmanuel Nenghabi; Charles W. Myles; Koushik Biswas; Matthew K. Beekman; George S. Nolas


Bulletin of the American Physical Society | 2011

Structural, Electronic and Vibrational Properties of Na

Craig Higgins; Emmanuel Nenghabi; Charles W. Myles; Koushik Biswas; Matt Beekman; George S. Nolas


Archive | 2009

_{x}

Charles W. Myles; Emmanuel Nenghabi


Archive | 2009

Si

Emmanuel Nenghabi; Charles W. Myles


Bulletin of the American Physical Society | 2009

_{136 }

Charles W. Myles; Emmanuel Nenghabi

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Koushik Biswas

Arkansas State University

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George S. Nolas

University of South Florida

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Matt Beekman

Oregon Institute of Technology

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Matthew K. Beekman

University of South Florida

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