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JoungYoungSug,Gi-HongRue,SuHoLee,SungYeolKwon,JinGyuKim,SangDonChoi,NamLyongKangy 한국물리학회 2002 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.40 No.5
In the present work, utilizing the equilibrium average projection scheme (EAPS), we will introduce ways to obtain the conductivity formulas which include the scattering factor-function.
THE TEMPERATURE PROPERTIES OF THIN FILM PIEZOELECTRIC MATERIALS
JOUNG-YOUNG, SUG,SU-HO, LEE,JUN-YONG, CHOI,SOON-CHEOL, PARK,JU-HYUN, YOO,GEON, SA-GONG Taylor Francis 2008 Integrated ferroelectrics Vol.99 No.1
<P> Based on quantum transport theory, we analysis the temperature dependence of optical quantum transition line shapes (QTLS) of GaAs and CdS in some temperatures, through the numerical analysis of theoretical result. We study the thermal properties of electron-piezoelectric phonon interacting system in the confinement of electrons by square well confinement potential. In order to analysis the quantum transition process, we compare the temperature dependence of the QTLW and the QTLS of two transition process, which are the phonon emission transition process and the phonon absorption transition process. We use the theory of the projected Liouville equation method with Equilibrium Average Projection Scheme (EAPS).</P>
Joung Young Sug,이수호,최준용 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.4
We apply the quantum transport theory (QTR) to system in the confinement of electrons by a square well confinement potential. We use the projected Liouville equation method with the equilibrium average projection scheme (EAPS). We select the current system under a linearly oscillatory external field. We derive the response formulas and the scattering factor formulas in four interacting systems of two transition types, the intraband transitions and interband transitions. With the compact procedure and the compact representations, we obtain results for scattering factor formulas in the Landau splitting system that can be applied directly to numerical analyses.
HyunJungLee,JaiHoonLee,YounJuLee,SangGyuJo,SamNyungYi,JoungYoungSug,NamLyongKang,최상돈 한국물리학회 2003 Current Applied Physics Vol.3 No.6
The quantum theory of intraband magneto-optical transition in semiconductors introduced previously in terms of continued-fraction-based power-series-expansion technique is reviewed in connection with examination of temperature- and dimensional-dependence of the width in GaAs and CdS in which piezoelectric scattering is dominant. With the same values of the piezoelectriccoupling constantK and the expansion parameterethe width in two-dimensions increases with temperature as in three-dimensions.Furthermore, the width becomes smaller uniformly as the dimension is reduced in the direction of static magnetic eld in thequantum limit, which is physical. Therefore, the continued-fraction-based theory gives quite good interpretation of the acousticphonon scattering in the quantum limit.. 2003 Elsevier B.V. All rights reserved.