Schottky barrier formation between GaAs( 110) and alkali metals

نویسندگان

  • J. Ortega
  • R. Perez
چکیده

The mechanism responsible of the Schottky barrier formation is anaiysed by considering a monolayer deposition of Li. Na or K on GaAs(ll0). These cases are studied by means of a free parameter consistent molecular orbital method. Che~so~tion energies. adsorption sites and Schottky barrier heights are calculated and found to be in good agreement with the experimental evidence. Our results tend to give a strong support to the induced density of interface states model.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Orientation-dependent chemistry and Schottky-barrier formation at metal-GaAs interfaces.

Soft-x-ray photoemission spectroscopy of metals deposited on GaAs demonstrates that minor misorientations of the (100) surface produce major deviations from Schottky-like behavior via increased chemical interactions. The degree of chemical activity correlates with the density of dangling bonds at the [110], [111]A,and [111]8steps, producing deep levels with acceptor character which dramatically...

متن کامل

Schottky contacts on passivated GaAs(1 0 0) surfaces: barrier height and reactivity

We present results on the experimental and theoretical investigations of metal contacts on chalcogen passivated GaAs(1 0 0) surfaces. Photoemission spectroscopy investigations show that depending on the metal used for the contact formation the chalcogen passivation reduces the interaction between metals and GaAs(1 0 0). For Sb no chemical reaction at all with the substrate surface is found, whi...

متن کامل

Ab Initio Study of Interface States at Metal Contacts to Iii-v Semiconductors

We present a theoretical study of the physical characteristics of metal/semiconductor junctions. Using first principle pseudopotential calculations, we have investigated the nature of electronic states with energies within the semiconductor band gap of representative abrupt, defect-free, anion-terminated metal/III-V interfaces. Namely, we focused on Al contacts to GaAs(001), AlAs(001) and cubic...

متن کامل

Electrical properties of GaAs photonic crystal cavity lateral p-i-n diodes

Related Articles GaAs nanowire Schottky barrier photovoltaics utilizing Au–Ga alloy catalytic tips Appl. Phys. Lett. 101, 013105 (2012) Effective work functions for the evaporated metal/organic semiconductor contacts from in-situ diode flatband potential measurements Appl. Phys. Lett. 101, 013501 (2012) Controlled formation of charge depletion zones by molecular doping in organic pin-diodes and...

متن کامل

Tantalum silicide Schottky contacts to GaAs

Tantalum silicide (TaSix ) films with different Si to Ta ratios (x) as Schottky contacts to GaAs have been studied. The films were prepared by coevaporation. The metallurgical properties of the film and the stability of the silicide-GaAs interface were studied by x-ray diffraction, Auger electron spectroscopy, and Rutherford backscattering spectroscopy. The films were annealed at various temper...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2002