Temperature dependence of the absorption coefficient in doped quantum wells

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The temperature dependence of the absorption coefficient of porous silicon

The spectral behavior and the temperature dependence of the absorption coefficient of microporous silicon films are studied in the energy range of 1.2–3.8 eV, between 7 and 450 K. For photon energies above the direct band gap at 3.3 eV, the spectral behavior of the absorption coefficient is similar to that of crystalline silicon, and its absolute value is comparable to that estimated using Brug...

متن کامل

The onset of exciton absorption in modulation doped GaAs quantum wells

We study the evolution of the absorption spectrum of a modulation doped GaAs/AlGaAs semiconductor quantum well with decreasing the carrier density. We find that there is a critical density which marks the transition from a Fermi edge singularity to a hydrogen-like behavior. At this density both the lineshape and the transitions energies of the excitons change. We study the density dependence of...

متن کامل

Temperature dependence of the band-band absorption coefficient in crystalline silicon from photoluminescence

in crystalline silicon from photoluminescence Hieu T. Nguyen, Fiacre E. Rougieux, Bernhard Mitchell, and Daniel Macdonald Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Canberra, ACT 0200, Australia Australian Centre for Advanced Photovoltaics, School of Photovoltaic and Renewable Energy Engineering, University of New South Wales...

متن کامل

Ising quantum Hall ferromagnet in magnetically doped quantum wells.

We report on the observation of the Ising quantum Hall ferromagnet with Curie temperature T(C) as high as 2 K in a modulation-doped (Cd,Mn)Te heterostructure. In this system field-induced crossing of Landau levels occurs due to the giant spin-splitting effect. Magnetoresistance data, collected over a wide range of temperatures, magnetic fields, tilt angles, and electron densities, are discussed...

متن کامل

Carrier-density dependence of the photoluminescence lifetimes in ZnCdSe/ZnSSe quantum wells at room temperature

Photoluminescence lifetimes have been measured at room temperature as a function of carrier density in ZnCdSe/ZnSSe quantum wells. We show that, at low carrier density (5310 – 5 310 cm), nonradiative recombination dominates, while radiative recombination becomes more dominant as the carrier density is increased from 5310 to 5310 cm. Above ;5 310 cm, band filling effects are shown to produce a s...

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

ژورنال

عنوان ژورنال: Brazilian Journal of Physics

سال: 1999

ISSN: 0103-9733

DOI: 10.1590/s0103-97331999000400021