Repositorio Dspace

Listar Unidad Académica de Física por autor "39945"

Listar Unidad Académica de Física por autor "39945"

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  • An alternative way of calculating the superlattice Green function for discrete media 
    Vlaev, Stoyan; Rodríguez Vargas, Isaac; Gaggero Sager, Luís Manuel; Velasco, Víctor (Elsevier, 2004-04)
    We present an alternative and efficient way for calculating the superlattice Green function for discrete systems. Theidea is to consider the superlattices as a crystal with the unit cell having the size of the superlattice ...
  • Angle-dependent bandgap engineering in gated graphene superlattices 
    García Cervantes, Heraclio; Gaggero Sager, Luís Manuel; Sotolongo Costa, Oscar; Naumis, Gerardo; Rodríguez Vargas, Isaac (American Institute of Physics, 2016-03-14)
    Graphene Superlattices (GSs) have attracted a lot of attention due to its peculiar properties as well as its possible technological implications. Among these characteristics we can mention: the extra Dirac points in the ...
  • Angle-dependent bandgap engineering in gated graphene superlattices 
    García Cervantes, Heraclio; Gaggero Sager, Luís Manuel; Sotolongo Costa, Oscar; Rodríguez Vargas, Isaac (AIP Publishing, 2016-03)
    Graphene Superlattices (GSs) have attracted a lot of attention due to its peculiar properties as well as its possible technological implications. Among these characteristics we can mention: the extra Dirac points in the ...
  • Asymmetrical external effects on transmission, conductance and giant tunneling magnetoresistance in silicene 
    Outmane, Oubram; Navarro, Oracio; Rodríguez Vargas, Isaac; Guzmán, E. J. (Elsevier, 2018-01)
    Electron transport in a silicene structure, composed of a pair of magnetic gates, is studied in a ferromagnetic and antiferromagnetic configuration. The transport properties are investigated for asymmetrical external ...
  • Concentration and band offset dependence of the electronic basic transition of cubic InxGa1−xN/InyGa1−yN quantum wells 
    Hernández Cocoletzi, Heriberto; Contreras Solorio, David Armando; Vlaev, Stoyan; Rodríguez Vargas, Isaac (Elsevier, 2009-08)
    We calculate the transition energy from the first level of holes to the first level of electrons for cubic InxGa1−xN/InyGa1−yN quantum wells. We employ the empirical tight binding approach with an sp3s* orbital basis, ...
  • Controlling the optical absorption properties of d-FETs by means of contact voltage and hydrostatic pressure effects 
    Outmane, Oubram; Navarro, Oracio; Rodríguez Vargas, Isaac; Gaggero Sager, Luís Manuel; Noverola, H.G (Elsevier, 2017-12)
    The effects of contact voltage and hydrostatic pressure on subband structure and optical transitions in GaAs delta-Field Effect Transistor (d-FET) are theoretically studied. The electronic structure of d-FET under ...
  • Effect of the magnetic field on the nonlinear optical rectification and second and third harmonic generation in double δ-doped GaAs quantum wells 
    Martínez Orozco, Juan Carlos; Rojas Briseño, J. G.; Rodríguez Magdaleno, Karla Arely; Rodríguez Vargas, Isaac; Mora Ramos, Miguel Eduardo; Restrepo Arango, Ricardo León; Ungan, Fatih; Kasapoǧlu, Esin; Duque, Carlos Alberto (Elsevier, 2017-11)
    In this paper we are reporting the computation for the Nonlinear Optical Rectification (NOR) and the Second and Third Harmonic Generation (SHG and THG) related with electronic states of asymmetric double Si-δ-doped quantum ...
  • Electron transport in AlxGa1 xAs d-MIGFETs: Conductivity enhancement induced by magnetic field effects 
    Outmane, Oubram; Rodríguez Vargas, Isaac; Gaggero Sager, Luís Manuel; Cisneros Villalobos, Luis; Bassam, Ali; Velásquez Aguilar, J.G.; Limon Mendoza, Mario (Elsevier, 2016-10-21)
    The electronic structure and the transport phenomena of d-MIGFETs have been studied in an AlxGa1 xAs host matrix. The subband structure and mobility calculations were performed within the effective mass approximation and ...
  • Energy minibands degeneration induced by magnetic fieldeffects in graphene superlattices 
    Reyes Villagrana, Raúl A.; Carrera Escobedo, Víctor Hugo; Suárez López, Jaime Raúl; Madrigal Melchor, Jesús; Rodríguez Vargas, Isaac (Elsevier, 2017-12)
    Energy minibands are a basic feature of practically any superlattice. In this regard graphene superlattices are not the exception and recently miniband transport has been reported through magneto-transport measurements. ...
  • Fano resonances in bilayer graphene superlattices 
    Briones Torres, José Alberto; Rodríguez Vargas, Isaac (Springer Nature, 2017-12-01)
    In this work, we address the ubiquitous phenomenon of Fano resonances in bilayer graphene. We consider that this phenomenon is as exotic as other phenomena in graphene because it can arise without an external extended ...
  • Giant oscillating magnetoresistance in silicene-based structures 
    Outmane, Oubram; Navarro, Oracio; Rodríguez Vargas, Isaac; Guzmán, E. J.; Cisneros Villalobos, Luis; Velásquez Aguilar, J.G. (AIP Publishing, 2018-02-08)
    Ballistic electron transport in a silicene structure, composed of a pair of magnetic gates, in the ferromagnetic and an-tiferromagnetic configuration is studied. This theoretical study has been done using the matrix transfer ...
  • Hole states in diamond p-delta-doped field effect transistors 
    Martínez Orozco, Juan Carlos; Rodríguez Vargas, Isaac; Mora Ramos, Miguel (IOP PUBLISHING, 2009)
    The p-delta-doping in diamond allows to create high density two-dimensional hole gases. This technique has already been applied in the design and fabrication of diamond-based field effect transistors. Consequently, the ...
  • Hole-level structure of double -doped quantum wells in Si: The influence of the split-off band 
    Rodríguez Vargas, Isaac; Gaggero Sager, Luís Manuel (Elsevier, 2007-02-15)
    We present the electronic structure calculation of two closely p-type -doped quantum wells within the lines of the Thomas–Fermi–Dirac (TFD) theory. The distance between the impurity planes as well as the impurity density ...
  • Improvement of the quantum confined Stark effect characteristics by means of energy band profile modulation: The case of Gaussian quantum wells 
    Ramírez Morales, Alejandro; Martínez Orozco, Juan Carlos; Rodríguez Vargas, Isaac (AIP Publishing, 2011-11-29)
    We study the quantum confined stark effect (QCSE) characteristics in Gaussian quantum wells (GQW). This special energy band profile is built varying the aluminum concentration of the AlGaAs ternary alloy in Gaussian ...
  • Intermediate band formation in a d-doped like QW superlattices of GaAs/AlxGa1 xAs for solar cell design 
    del Río de Santiago, Antonio; Martínez Orozco, Juan Carlos; Rodríguez Magdaleno, Karla Arely; Contreras Solorio, David Armando; Rodríguez Vargas, Isaac; Ungan, Fatih (Elsevier, 2018-03)
    It is reported a numerical computation of the local density of states for a d-doped like QW superlattices of AlxGa1 xAs, as a possible heterostructure that, being integrated into a solar cell device design, can provide ...
  • k p calculations of p-type d-doped quantum wells in Si 
    Rodríguez Vargas, Isaac; Mora Ramos, Miguel (Elsevier, 2008-06)
    We present the hole subband structure calculation in single and double p-type δ-doped quantum wells in Si based on the Luttinger–Kohn Hamiltonian. The valence band bending and the hole states are calculated within the ...
  • k · p calculations for double p-type -doped quantum wells in GaAs 
    Rodríguez Vargas, Isaac; Mora Ramos, Miguel (Elsevier, 2006-07-11)
    The hole subband structure in double p-type -doped quantum wells in GaAs is computed with the use of the 4 × 4 k · p Hamiltonian. The Thomas–Fermi–Dirac approach is implemented for the description of the valence band ...
  • Low-dimensional thermoelectricity in graphene: The case of gated graphene superlattices 
    Molina Valdovinos, Sergio; Martínez Rivera, Freddyson J.; Moreno Cabrera, Nadia E.; Rodríguez Vargas, Isaac (Elsevier, 2018-07)
    Low-dimensional thermoelectricity is a key concept in modern thermoelectricity. This concept refers to the possibility to improve thermoelectric performance through redistribution of the density of states by reducing the ...
  • Refractive index changes in n-type delta-doped GaAs under hydrostatic pressure 
    Outmane, Oubram; Rodríguez Vargas, Isaac; Martínez Orozco, Juan Carlos (Sociedad Mexicana de Física, 2014-04)
    The effect of hydrostatic pressure on the refractive index changes (RIC) is studied in δ-doped quantum well (DDQW) in GaAs. Based on the effective mass approximation we implement an algebraic formalism to calculate the ...
  • Self-similar conductance patterns in graphene Cantor-like structures 
    García Cervantes, Heraclio; Gaggero Sager, Luís Manuel; Díaz Guerrero, Dan Sidney; Sotolongo Costa, Oscar; Rodríguez Vargas, Isaac (Springer, 2017-04-04)
    Graphene has proven to be an ideal system for exotic transport phenomena. In this work, we report another exotic characteristic of the electron transport in graphene. Namely, we show that the linearregime conductance can ...

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