High-pressure Raman scattering in InGaN heteroepitaxial layers: Effect of the substrate on the phonon pressure coefficients

نویسندگان

  • R. Oliva
  • J. Ibáñez
  • R. Cuscó
  • A. Dadgar
  • A. Krost
  • J. Gandhi
  • A. Bensaoula
چکیده

برای دانلود رایگان 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

High – pressure Raman study of L - alanine crystal

Pressure-dependent Raman scattering studies in the range 0.0 – 32 kbar were carried out in L-alanine in order to investigate its external mode phonon spectra in relation to the phase transitions in the crystal. A careful analysis of the spectra shows that the low-energy Raman modes exhibit variation both in frequency and in intensity and between 26 and 28 kbar it is observed a splitting of a ex...

متن کامل

Effect of pressure on the Raman anomaly of zinc-blende CuBr and Raman spectra of high-pressure phases

Raman spectra of isotopically pure CuBr (Cu Br) were measured under hydrostatic pressures up to 10 GPa at 10 K. The anomalous line shape of the longitudinal-optic ~LO! scattering in the zinc-blende phase ~CuBr-III, 0–4 GPa!, consisting of a broad structure between 155 and 177 cm, exhibits a continuous change with pressure and develops into a narrow LO phonon peak near 4 GPa. The disappearance o...

متن کامل

Composition dependence of the phonon strain shift coefficients of SiGe alloys revisited

By combining Raman scattering from the cleaved edge and under hydrostatic pressure, we have accurately determined the tetragonal phonon deformation potentials of strained Si1−xGex alloys in the entire compositional range for the Ge-like, Si-like, and mixed Si–Ge optical modes. A known biaxial strain is induced on thin alloy layers by pseudomorphic epitaxial growth on silicon and subsequent capp...

متن کامل

Micro - Raman scattering investigation of MgB 2 and RB 2 ( R = Al , Mn , Nb and Ti )

Phonon spectra have been investigated by micro-Raman scattering from 290 to 20K. New peaks at 500 and 674 cm appear below 250K in MgB2. These peaks are explained by the Fermi resonance, where Raman-active E2g intereacts with the overtone of E1u due to anhamonicity. Raman spectra of the isostructural RB2 (R=Al, Mn, Nb and Ti) have been also measured at 290K. The line width of E2g phonon of the s...

متن کامل

نرم شدگی فونون‌های انرژی بالا با گذار عایق - ابررسانا در سیستم ابررسانای Ba1-xKxBiO3

Single crystals of Ba1-xKxBiO3 compound for 0 < x <0.6 from insulator to superconducting region have been grown by electrochemical method. The crystals have been characterized by powder x-ray diffraction and Laue x-ray to determine the crystal structure, formed phases and potassium concentration. Inelastic x-ray scattering spectrum of the crystals has been studied to investigate the phonon pro...

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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014