Electron structure and electron dynamics at InSb(111)2×2 semiconductor surface

• The conduction band electronic structure and the electron dynamics of the clean InSb(111)2 x 2 surface have been studied by laser based pump-and-probe photoemission. The results are compared to earlier studies of the InSb(110) surface. It is found that both the energy location and the time dependence of the photoexcited structures are very similar for the two surfaces. This indicates that the dominant part of the photoemission signal in the conduction band region is due to excitations of electrons in the bulk region and that the surface electronic states play a minor role. The fast decay of the excited state, tau similar to 12 ps, indicates that diffusion of hot electrons into the bulk is an important mechanism.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

Band structure

Carrier mobility

Electron scattering

Laser pulses

Laser tuning

Light emission

Photoelectron spectroscopy

Solid state lasers

Conduction band

Electron dynamics

Indium antimonide

Laser based pump-and-probe photoemission

Time and angle resolved photoelectron spectroscopy

Electrophysics

Elektrofysik

Publication and Content Type

ref (subject category)

art (subject category)