hafid KHALFOUN

RESEARCH, TEACHING, or OTHER INTERESTS

Condensed Matter Physics, Materials Science

Scopus Publications

The electronic transport properties of armchair carbon nanotubes with single and multiple horizontal boron-nitride lines: Unusual effects of high bias voltage on I-V characteristics
A. Khemissi and H. Khalfoun
Elsevier BV



Stability and electronic transport properties for discernible binary (BN)C<inf>x</inf> armchair heteronanotubes
A. Khemissi and H. Khalfoun
Elsevier BV



Spin gapless semiconductor and nearly spin semimetal antiferromagnets: The case of the inverse Heusler compounds Mn<inf>2</inf>LiZ (Z = Al and Ga)
Tariq Hadji, Hafid Khalfoun, Habib Rached, and Ahmed Azzouz-Rached
Elsevier BV



Ab-initio prediction of high T<inf>C</inf> half-metallic ferrimagnetism in Li-based Heusler compounds Mn<inf>2</inf>LiZ (Z = Si, Ge and Sn)
Tariq Hadji, Hafid Khalfoun, Habib Rached, and Ahmed Azzouz-Rached
Elsevier BV



DFT study with different exchange-correlation potentials of physical properties of the new synthesized alkali-metal based Heusler alloy
Tariq Hadji, Hafid Khalfoun, Habib Rached, Youcef Guermit, Ahmed Azzouz-Rached, and Djamel Rached
Springer Science and Business Media LLC



Transport regimes in nitrogen-doped carbon nanotubes: Perfect order, semi-random, and random disorder cases
Hafid Khalfoun, Aurélien Lherbier, Philippe Lambin, Luc Henrard, and Jean-Christophe Charlier
American Physical Society (APS)
The electronic structure and the transport properties of nitrogen-doped carbon nanotubes are investigated using a tight-binding model and a real-space Kubo-Greenwood approach, respectively. The transport regimes of various axial and helical doping configurations, from perfectly periodic to fully random disordered cases, are examined through the time dependence of the diffusivity. By varying the degree of disorder, a rich set of transient regimes is predicted going from persisting quasiballistic to momentarily localized regimes. A spectacular long-time ballistic regime is also observed for a specific semi-random disorder doping configuration owing to symmetry effects.


Long-range resonant effects on electronic transport of nitrogen-doped carbon nanotubes
Hafid Khalfoun, Philippe Lambin, and Luc Henrard
American Physical Society (APS)
(Received 30 August 2013; revised manuscript received 1 October 2013; published 13 January 2014)The electronic transport properties of ordered and disordered nitrogen-doped metallic carbon nanotubes withlong-rangecorrelationarestudiednumericallywithatight-bindingmodel.Dopingwithbothtranslational(axial)and screw symmetry are considered. In periodic defective systems, when axial doping is considered, two classesof electronic transport responses are obtained. One quantum conductance plateau settles down around the defectenergy only when the period of the structure is a multiple of the Fermi wavelength 3


B and N codoping effect on electronic transport in carbon nanotubes
Hafid Khalfoun, Patrick Hermet, Luc Henrard, and Sylvain Latil
American Physical Society (APS)



Nature of the enhanced resonant modes in one-dimensional photonic random dimer systems
H Khalfoun, M Bouamoud, S Bentata, L Henrard, and C Vandenbem
IOP Publishing
The propagation of light in a one-dimensional multilayer stack is examined for a disordered system with short range correlation. As known in the random dimer model, pairing the defect elements at random breaks down the Anderson localization and opens a frequency window of extended propagating modes around the predicted conventional dimer resonance. By dealing with host and defect layers with identical phase thicknesses at both host and defect principal standing resonances, we demonstrate the existence of a new ballistic-like regime at an additional standing commuting resonance. Moreover, by suitably tuning the host standing and conventional defect dimer resonances relative to each other, the transmission responses are both turned into a ballistic transmission regime. By scaling the transmission coefficient over the system length within the resonance window, we analyse the nature of the propagating modes, i.e. ballistic or diffusive. Beyond the resonance, quantitative views on the different transmission regimes and their related phase transitions are examined, pointing out the possibility of designing attractive ballistic resonant optical devices with adjustable transmission responses.


The ballistic dimer resonance in the one-dimensional disordered photonic crystals
H. Khalfoun, S. Bentata, M. Bouamoud, L. Henrard, and C. Vandenbem
Elsevier BV



The ballistic resonance of transversal mechanical waves in random-dimer systems
H. Khalfoun, S. Bentata, M. Bouamoud, and L. Henrard
Elsevier BV



To the ballistic dimer resonance in the propagation of mechanical waves in one dimensional linear lattice
H. Khalfoun, M. Bouamoud ., and S. Bentata .
Science Alert