TITLE

Absorption spectra of thin films of the solid solutions Rb2(Cd1-xZnx)I4

AUTHOR(S)
Miloslavskii, V. K.; Yunakova, O. N.; Kovalenko, E. N.
PUB. DATE
April 2010
SOURCE
Low Temperature Physics;Apr2010, Vol. 36 Issue 4, p329
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The excitonic absorption spectra of thin films of the solid solutions Rb2(Cd1-xZnx)I4 have been studied for the first time. It is determined that the spectra of the solid solutions are stable and consist of two bands which genetically originate from the initial bands of the compounds Rb2CdI4 and Rb2ZnI4. It is shown on the basis of the structure of the crystal lattices of the compounds that the concentration dependence of the spectral position of the excitonic bands AI and AII is related with the transfer of excitons between CdI4 and ZnI4 tetrahedra along the b axis of the solid solutions. The experimental result is in good agreement with the calculation of the energies EAI(x) and EAII(x) on the basis of a theory similar to the theory of Davydov splitting of excitonic bands in molecular crystals.
ACCESSION #
50330391

 

Related Articles

  • Excitonic absorption spectra and phase transitions in thin films of the ferroelastics Cs[sub 2]CdI[sub 4] and Rb[sub 2]CdI[sub 4]. Yunakova, 0. N.; Miloslavsky, V. K.; Kovalenko, F. N. // Low Temperature Physics;Aug2003, Vol. 29 Issue 8, p691 

    The absorption spectrum of thin films of the ferroelastics M[sub 2]CdI[sub 4] (M=Cs, Rb) with a structure of the �-K[sub 2]SO[sub 4] type is investigated in the energy range 3�6 eV and temperature range 90�420 K. It is found that both compounds are direct-gap insulators, and the...

  • Absorption Spectrum of Thin K2CdI4 Films. Yunakova, O. N.; Miloslavski?, V. K.; Kovalenko, E. N. // Physics of the Solid State;Mar2005, Vol. 47 Issue 3, p474 

    The absorption spectrum of thin films of a new compound, K2CdI4, was studied. It was established that this compound belongs to direct-bandgap dielectrics and that its low-frequency electronic and excitonic excitations are localized in CdI2�4 structural blocks of the crystal lattice. It was...

  • Structural properties of the epitaxial (SiC)(AlN) solid solution films fabricated by magnetron sputtering of SiC-Al composite targets. Ramazanov, Sh.; Kurbanov, M.; Safaraliev, G.; Bilalov, B.; Kargin, N.; Gusev, A. // Technical Physics Letters;Apr2014, Vol. 40 Issue 4, p300 

    Epitaxial layers of the (SiC)(AlN) solid solution with x ≈ 0.12 and x = 0.64 without macroscopic structural distortions were grown using a new technique. It was established that the compositional dependences of crystal lattice parameters of the epitaxial films obey the Vegard's law with an...

  • The Excitonic Absorption Spectrum of Thin Ag[sub 2]ZnI[sub 4] Films. Yunakova, O. N.; Miloslavskii, V. K.; Kovalenko, E. N. // Physics of the Solid State;Jan2002, Vol. 44 Issue 1, p48 

    The electron absorption spectrum of thin films of the Ag[sub 2]ZnI[sub 4] complex compound is studied at photon energies of 3-6 eV. It is established that the interband absorption edge corresponds to an allowed direct transitions across the energy gap E[sub g]=3.7 eV. A strong exciton band is...

  • Thin sol–gel bismuth silicate films. Klebanskiı, E. O.; Kudzin, A. Yu.; Pasal’skiı, V. M.; Plyaka, S. N.; Sadovskaya, L. Ya.; Sokolyanskiı, G. Kh. // Physics of the Solid State;Jun99, Vol. 41 Issue 6, p913 

    The sol-gel method is used to obtain thin films with the composition Bi[sub 12]SiO[sub 20]. The characteristic features of the technology for obtaining the films are presented. Diffractometry confirmed that the films possess γ-Bi[sub 2]O[sub 3]-type structure. The transmission spectra of the...

  • Empirical rule of intrinsic absorption spectroscopy in Hg1-xCdxTe. Chu, Junhao; Li, Biao; Liu, Kun; Tang, Dingyuan // Journal of Applied Physics;1/15/1994, Vol. 75 Issue 2, p1234 

    Presents an empirical formula for the calculation of the intrinsic optical absorption coefficient at the Kane region derived from the measured absorption spectra in the whole intrinsic absorption region for Hg[sub1 x]Cd[subx]Te. Part of a complete intrinsic absorption spectra.

  • Two-photon absorption spectrum of 3-butoxycarbonylmethylurethane polydiacetylene thin films. Banfi, GianPiero; Fortusini, Davide // Journal of Chemical Physics;3/8/1998, Vol. 108 Issue 10, p4319 

    Examines the two-photon absorption (TPA) spectrum of 3-butoxycarbonylmethylurethane polydiacetylene (poly(3-BCMU)) thin films. Absence of minor TPA resonances in poly(3-BCMU) films; Wavelength of poly(3-BCMU) in TPA spectrum; Account of the two-photon state features in TPA spectrum.

  • Effect of lattice mismatch on surface morphology of (110) thin films of 214-type superconductors. Sato, H.; Naito, M. // Applied Physics Letters;1/23/1995, Vol. 66 Issue 4, p514 

    Investigates the effect of lattice mismatch between the thin films and substrates on the surface morphology in superconductors. Preparation of the La[sub 2]CuO[sub 4] substrates from single crystals; Growth of thin films by means of reactive coevaporation; Reduction of surface roughness in thin...

  • Absorption spectrum and excitons in thin films of the solid electrolyte RbCu[sub 4]Cl[sub 3]I[sub 2]. Miloslavskii, V. K.; Kovalenko, E. N.; Yunakova, O. N. // Physics of the Solid State;Jun98, Vol. 40 Issue 6, p934 

    We have investigated the absorption spectrum of thin films of the superionic conductor RbCu[sub 4]C1[sub 3]I[sub 2] synthesized on NaCl crystalline substrates. It is shown that the electron and exciton excitations in the energy interval 3-6 eV are associated with optical transitions in the...

Share

Read the Article

Courtesy of AIRBUS FRANCE S.A.S.

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics