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Yayın Complex and real rays in three dimensional Minkowski space(IEEE, 2002) Hasanoğlu, ElmanA new approach to the theory of complex rays is proposed. It is shown that the Minkowski space is more appropriate for describing these rays than the usual, Euclidian spaces. Some illustrative examples are represented.Yayın Electron-phonon mass enhancement parameter of the (Gamma) over-bar surface state on Au(111) measured by photoemission spectroscopy(American Physical Society, 2006-07) LaShell, S.; McDougall, B.A.; Jensen, E.We report the measurement of lambda, the electron-phonon mass enhancement parameter, for the spin-orbit-split Gamma surface state on Au(111). lambda is determined from the change of the photoemission linewidth as a function of temperature. The difference between the normal emission lambda=0.34 +/- 0.01 and midband lambda=0.30 +/- 0.01 is explained as increasing bulk penetration of the surface state as it approaches the Fermi level.
