TITLE

Effects of spin structures on phonons in BaFe2As2

AUTHOR(S)
Wang, Y.; Shang, S. L.; Hui, X. D.; Chen, L. Q.; Liu, Z. K.
PUB. DATE
July 2010
SOURCE
Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p022504
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The dependences of phonons on the spin structures of BaFe2As2 were studied using first-principles supercell approach. We considered the nonmagnetic, checkerboard, stripe, and spin-density-wave structures as well as a spin structure labeled as STR17. We find that STR17 is lower in energy than the stripe. It is seen the ∼20 meV missing peak at the generalized phonon density-of-states and the measured specific heat are well reproduced when the magnetic effects are accounted. We see phonon energy gaps for all the four magnetic structures but not for the nonmagnetic structure.
ACCESSION #
52289426

 

Related Articles

  • The Mechanism of d-Wave Superconductivity of Underdoped High- T c Cuprates. Mojumder, M. // Journal of Superconductivity & Novel Magnetism;Feb2010, Vol. 23 Issue 2, p285 

    We have worked out the theory of d-wave superconductivity of the doped cuprate that is consistent with up-to-date data on the basis of the assumption of two-channel Kondo fixed point of the latter. Strong local Coulomb scattering between carriers combined with strong and weak involvement,...

  • Efficiency of quasiparticle creation in proximized superconducting photon detectors. Hijmering, R. A.; Verhoeve, P.; Martin, D. D. E.; Kozorezov, A. G.; Wigmore, J. K.; Venn, R.; Groot, P. J.; Jerjen, I. // Journal of Applied Physics;Jun2009, Vol. 105 Issue 12, p123906 

    In previous work using thin superconducting films as photon detectors it has been assumed implicitly that the quasiparticle yield in proximized superconducting bilayers should be the same as for a pure superconducting layer with the same energy gap. The reasoning is that, following the energy...

  • Experimental evidence of the role of quasilocalized phonons in the thermal conductivity of simple alcohols in orientationally ordered crystalline phases. Krivchikov, A. I.; Sharapova, I. V.; Korolyuk, O. A.; Romantsova, O. O.; Bermejo, F. J. // Low Temperature Physics;Nov2009, Vol. 35 Issue 11, p891 

    The thermal conductivity κ(T) of crystalline alcohols (methyl, ethyl and 1-propyl) within their thermodynamic equilibrium phases for T>=2 K and under the equilibrium vapor pressures has been measured and analyzed. While such compounds usually exhibit a rich polymorphism including amorphous...

  • Relaxation of excited donor states in silicon with emission of intervalley phonons. Tsyplenkov, V. V.; Demidov, E. V.; Kovalevsky, K. A.; Shastin, V. N. // Semiconductors;Sep2008, Vol. 42 Issue 9, p1016 

    The process of low-temperature relaxation of excited states of Group V donors in silicon due to coupling of electrons bound at Coulomb centers with intervalley phonons is analyzed. The rate of transitions from the 2 p 0 state to the group of 1 s( E, T 2) states with emission of the intervalley...

  • Role of dispersion on phononic thermal boundary conductance. Duda, John C.; Beechem, Thomas E.; Smoyer, Justin L.; Norris, Pamela M.; Hopkins, Patrick E. // Journal of Applied Physics;Oct2010, Vol. 108 Issue 7, p073515 

    The diffuse mismatch model (DMM) is one of the most widely implemented models for predicting thermal boundary conductance at interfaces where phonons dominate interfacial thermal transport. In the original presentation of the DMM, the materials comprising the interface were described as Debye...

  • Isotope-induced elastic scattering of optical phonons in individual suspended single-walled carbon nanotubes. Zhao, Pei; Einarsson, Erik; Xiang, Rong; Murakami, Yoichi; Chiashi, Shohei; Shiomi, Junichiro; Maruyama, Shigeo // Applied Physics Letters;8/29/2011, Vol. 99 Issue 9, p093104 

    Isotope-induced scattering of optical phonons in individual single-walled carbon nanotubes (SWNTs) was investigated by resonance Raman scattering measurements of more than 600 suspended, isotope-mixed SWNTs. The G+ and G- features in the SWNT G-band exhibit broadening of up to 80% and 25%,...

  • Phonon-assisted stimulated emission from single CdS nanoribbons at room temperature. Pan, A. L.; Liu, R. B.; Zou, B. S. // Applied Physics Letters;4/24/2006, Vol. 88 Issue 17, p173102 

    We report room-temperature stimulated emission in single CdS nanoribbons obtained through Au-catalyzed physical evaporation route. These ribbons have single-crystal structures and uniform rectangular cross sections and grow along the [100] direction. The ribbons show good waveguide/cavity...

  • Isotope effect in the superconducting high-pressure simple cubic phase of calcium from first principles. Errea, Ion; Rousseau, Bruno; Bergara, Aitor // Journal of Applied Physics;Jun2012, Vol. 111 Issue 11, p112604 

    It has been recently shown [I. Errea, B. Rousseau, and A. Bergara, Phys. Rev. Lett. 106, 165501 (2011)] that the phonons of the high-pressure simple cubic phase of calcium are stabilized by strong quantum anharmonic effects. This was obtained by a fully ab initio implementation of the...

  • Phonon scattering at a rough interface between two fcc lattices. Zhao, Hong; Freund, Jonathan B. // Journal of Applied Physics;Jan2009, Vol. 105 Issue 1, p013515 

    Elastic phonon scattering at an atomically rough interface that separates two fcc lattice leads is computed via a Green’s function method. Results are compared to specular and diffuse phonon scattering models, both of which are widely used in the numerical simulations of phonon Boltzmann...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics