New Critical Density in Metal-Insulator Transition, obtained in n(p)- Type Degenerate InP1-x Asx (Sbx), GaAs1-xTex(Sbx,Px), CdS1-xTex(Sex)-Crystalline Alloys. (II) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue European Journal of Applied Science, Engineering and Technology Année : 2024

New Critical Density in Metal-Insulator Transition, obtained in n(p)- Type Degenerate InP1-x Asx (Sbx), GaAs1-xTex(Sbx,Px), CdS1-xTex(Sex)-Crystalline Alloys. (II)

Résumé

By basing on the same physical model and treatment method, as used in our recent works [1, 2], we will investigate the critical impurity densities in the metal-insulator transition (MIT), obtained in n(p)-type degenerate [〖InP_(1-x) As_x (Sb_x),GaAs〗_(1-x) Te_x 〖(Sb_x,P_x),CdS〗_(1-x) Te_x (Se_x)]- crystalline alloys, 0≤x≤1, being due to the effects of the size of donor (acceptor) d(a)-radius, r_(d(a)), the x- concentration, and finally the high d(a)-density, N, assuming that all the impurities are ionized even at T=0 K. In such n(p)-type degenerate crystalline alloys, we will determine: (i)-the critical impurity density N_(CDn(CDp)) (r_(d(a)),x) in the MIT, as that given in Eq. (8), by using an empirical Mott parameter M_(n(p))=0.25, and (ii)-the density of electrons (holes) localized in the exponential conduction (valence)-band tails (EBT), N_CDn(CDp)^EBT (〖 r〗_d(a) ,x), as that given in Eq. (26), by using our empirical Heisenberg parameter, H_(n(p))=0.47137, as given in Eq. (15), according to: for given〖 r〗_d(a) and x, N_CDn(CDp)^EBT (〖 r〗_d(a) ,x)≅N_(CDn(CDp)) (r_(d(a)),x), with a precision of the order of 2.92×10^(-7) , as observed in Tables 2-8 in Appendix 1. In other words, such the critical d(a)-density N_CDn(NDp) (r_(d(a))),x), is just the density of electrons (holes) localized in the EBT, N_CDn(CDp)^EBT (〖 r〗_(d(a)),x), respectively.
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hal-04538741 , version 1 (09-04-2024)

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  • HAL Id : hal-04538741 , version 1

Citer

Huynh Van-Cong. New Critical Density in Metal-Insulator Transition, obtained in n(p)- Type Degenerate InP1-x Asx (Sbx), GaAs1-xTex(Sbx,Px), CdS1-xTex(Sex)-Crystalline Alloys. (II). European Journal of Applied Science, Engineering and Technology, 2024, 2 (2), pp.186-211. ⟨hal-04538741⟩

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