%0 Journal Article %1 WOS:000223500800007 %A Vasconcelos, MS %A Mauriz, PW %A Albuquerque, EL %A da Silva, EF %A Freire, VN %C PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS %D 2004 %I ELSEVIER SCIENCE BV %J APPLIED SURFACE SCIENCE %K Dyson's Hamiltonian; approach; density electronic equation; heat} of real-space renormalization-group specific states; tight-binding {electronic %N 1-4 %P 33-37 %R 10.1016/j.apsusc.2004.05.047 %T Electronic spectra of GaAs/GaxAl1-xAs superlattice with impurities arranged according to a Fibonacci sequence %V 234 %X We study the electronic density of states (DOS) of a GaAs/GaxAl1-xAs superlattice with impurities arranged according to the Fibonacci sequence. Our theory uses a Green function method based on Dyson's equation within the real-space renormalization-group approach in the framework of the tight-binding Hamiltonian for the Fibonacci quasiperiodic lattice. An exact decimation transformation has been done for the physical parameters characterizing the Fibonacci chain considering the scaling factor, under which the system is self-similar, equal to the golden mean tau=(1+root5)/2. The electronic energy spectrum are then used to determine the electronic specific heat which, due to the localization of the electronic states, exhibits strong Schottky anomalies when the temperature goes to zero together with a log-periodic oscillation. (C) 2004 Elsevier B.V. All rights reserved.

@article{WOS:000223500800007, abstract = {We study the electronic density of states (DOS) of a GaAs/GaxAl1-xAs superlattice with impurities arranged according to the Fibonacci sequence. Our theory uses a Green function method based on Dyson's equation within the real-space renormalization-group approach in the framework of the tight-binding Hamiltonian for the Fibonacci quasiperiodic lattice. An exact decimation transformation has been done for the physical parameters characterizing the Fibonacci chain considering the scaling factor, under which the system is self-similar, equal to the golden mean tau=(1+root5)/2. The electronic energy spectrum are then used to determine the electronic specific heat which, due to the localization of the electronic states, exhibits strong Schottky anomalies when the temperature goes to zero together with a log-periodic oscillation. (C) 2004 Elsevier B.V. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, author = {Vasconcelos, MS and Mauriz, PW and Albuquerque, EL and da Silva, EF and Freire, VN}, biburl = {https://www.bibsonomy.org/bibtex/2b3e1dc2d33f927bc77d04f3a9045cb9d/ppgfis_ufc_br}, doi = {10.1016/j.apsusc.2004.05.047}, interhash = {416c6c412ff4e29a47d32a6b7047f8ef}, intrahash = {b3e1dc2d33f927bc77d04f3a9045cb9d}, issn = {0169-4332}, journal = {APPLIED SURFACE SCIENCE}, keywords = {Dyson's Hamiltonian; approach; density electronic equation; heat} of real-space renormalization-group specific states; tight-binding {electronic}, note = {9th International Conference on Formation of Semiconductor Interfaces (ICFSI 9), Madrid, SPAIN, SEP 15-19, 2003}, number = {1-4}, pages = {33-37}, publisher = {ELSEVIER SCIENCE BV}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Electronic spectra of GaAs/GaxAl1-xAs superlattice with impurities arranged according to a Fibonacci sequence}, tppubtype = {article}, volume = 234, year = 2004 }