TITLE

Raman scattering from surface optical phonon in diameter modulated AlN nanotips

AUTHOR(S)
Sahoo, Satyaprakash; Dhara, S.; Arora, A. K.; Krishnan, R.; Chandramohan, P.; Srinivasan, M. P.
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/8/2010, Vol. 96 Issue 10, p103113
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We investigate the optical phonons in AlN nanotips using Raman spectroscopy. Apart from the group theoretically allowed optical phonons, an additional phonon mode at 850 cm-1 has been observed. Furthermore, the peak position has shown a significant redshift and its intensity increases dramatically with the change in dielectric medium. In view of its strong response to change in dielectric medium and good agreement with calculated surface optical phonon frequency in AlN, the observed phonon mode is assigned as surface optical phonon, which could be attributed to the diameter modulation in case of AlN nanotip.
ACCESSION #
48591056

 

Related Articles

  • Charge- and orbital-ordering patterns in Bi1/2Sr1/2MnO3 thin films studied by Raman scattering. Kawasaki, T.; Ogimoto, Y.; Ogawa, N.; Miyano, K.; Tamaru, H.; Izumi, M. // Journal of Applied Physics;6/15/2007, Vol. 101 Issue 12, p123714 

    Polarized Raman spectroscopy has been applied for Bi1/2Sr1/2MnO3 thin films on SrTiO3(001) substrate in order to clarify the charge- and orbital-ordering patterns. From the mode assignment on the basis of group theoretical analysis and the lattice dynamical calculations previously reported, it...

  • On the curve of the density of phonon states for cubic boron nitride (from the results of photoluminescence measurements). Shishonok, E.; Steeds, J. // Physics of the Solid State;Sep2007, Vol. 49 Issue 9, p1744 

    The fine structure of the phonon wing associated with the zero-phonon line (ZPL) of the BN1 center in the cubic boron nitride is analyzed in comparison with the structure of the phonon wing of the luminescence center at 3.188 eV in diamond, the second-order Raman scattering spectrum, and the...

  • Calculation of the lattice dynamics and Raman spectra of copper zinc tin chalcogenides and comparison to experiments. Khare, Ankur; Himmetoglu, Burak; Johnson, Melissa; Norris, David J.; Cococcioni, Matteo; Aydil, Eray S. // Journal of Applied Physics;Apr2012, Vol. 111 Issue 8, p083707 

    The electronic structure, lattice dynamics, and Raman spectra of the kesterite, stannite, and pre-mixed Cu-Au (PMCA) structures of Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) were calculated using density functional theory (DFT). Differences in longitudinal and transverse optical (LO-TO) splitting...

  • Raman scattering characterization and electron phonon coupling strength for MeV implanted InP(111). Paramanik, Dipak; Varma, Shikha // Journal of Applied Physics;1/15/2007, Vol. 101 Issue 2, p023528 

    Structural modifications in InP(111) due to 1.5 MeV implantation of Sb have been characterized using first-order and second-order Raman spectroscopy. With both longitudinal optical (LO) and transverse optical (TO) modes allowed for InP(111), we have investigated the evolution of both these modes...

  • Off-Center Guest Vibrations and Their Effect on Lattice Thermal Conductivity in n- and p-Type β-Ba8Ga16Sn30. Suekuni, Koichiro; Tanaka, Tomoo; Yamamoto, Shuhei; Avila, Marcos; Umeo, Kazunori; Takasu, Yuichi; Hasegawa, Takumi; Ogita, Norio; Udagawa, Masayuki; Takabatake, Toshiro // Journal of Electronic Materials;Jul2009, Vol. 38 Issue 7, p1516 

    We report on thermoelectric and Raman scattering studies of single crystalline samples of a type I clathrate Ba8Ga16Sn30. The n- and p-type samples have a thermopower of −300 μV/K and +270 μV/K, and electrical resistivity of 20 mΩ cm and 40 mΩ cm at room temperature,...

  • Single-crystal, polarized, Raman scattering study of the molecular and lattice vibrations for the energetic material cyclotrimethylene trinitramine. Haycraft, James J.; Stevens, Lewis L.; Eckhardt, Craig J. // Journal of Applied Physics;9/1/2006, Vol. 100 Issue 5, p053508 

    The single-crystal, polarized, Raman spectra for cyclotrimethylene trinitramine (RDX) have been studied at room temperature and pressure over the region of 5–3400 cm-1. While the observed Raman bands agree well with a previous Raman study, this work provides a consistent interpretation of...

  • Number-of-layer discriminated graphene phonon softening and stiffening. Wang, Y.; Yang, X. X.; Li, J. W.; Zhou, Z. F.; Zheng, W. T.; Sun, Chang Q. // Applied Physics Letters;10/17/2011, Vol. 99 Issue 16, p163109 

    From the perspective of bond order-length-strength correlation and the local bond averaging approach, we have formulated the number-of-layer resolved Raman shifts of graphene, with quantification of the referential origins from which the Raman shifts proceed and clarification of their origins....

  • Analysis of semiconductor surface phonons by Raman spectroscopy. Esser, N. // Applied Physics A: Materials Science & Processing;1999, Vol. 69 Issue 5, p507 

    Abstract. Only recently Raman spectroscopy (RS) has advanced into the study of surface phonons from clean and adsorbate-covered semiconductor surfaces. RS allows the determination of eigenfrequencies as well as symmetry selection rules of surface phonons, by k-conservation limited to the...

  • Raman studies of optical phonons in vertical cadmium sulfide nanorod arrays. Dongjuan Xi; Jianzhong Li; Qibing Pei; Bin Chen // Journal of Materials Research;Nov2006, Vol. 21 Issue 11, p24 

    Electrochemically grown cadmium sulfide (CdS) nanorod arrays were studied with Raman spectroscopy. The resonant Raman spectroscopy unravels the enhanced electron-phonon interaction up to the fifth-order multiphonon process in the vertically aligned CdS nanorods after annealing. Resonant Raman...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics