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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.27 no.2 (2000), pp. 094-098
Effects of Electron ? Electron Interactions and of Magnetic Field on Density of States in Disordered Metallic Systems
S. Caliskan, E. Şaşioğlu, E. Makhmedov, M. Kumru
Fatih University, Faculty of Arts and Sciences, Physics Department, 34900 B. Cekmece, Istanbul, Turkey
go backFatih University, Faculty of Arts and Sciences, Physics Department, 34900 B. Cekmece, Istanbul, Turkey
Abstract. Effect of electron-electron interaction and of magnetic field on the one particle density of states (DOS) is considered for two and three-dimensional weakly disordered metallic systems. High order corrections to the Green's function is taken into account by means of Dyson equation. By summing up infinite series of diagrams in magnetic field for the DOS, it is shown that in two and three dimensions the dependences of the DOS on the magnetic field and energy are nonlinear and it is obtained that at the Fermi level when energy, reckoned from Fermi level, goes to zero the DOS vanishes for both dimensions.