Mobile copper ions as heat carriers in polymorphous copper sulfide superionic conductors

Xin Liang
September 2017
Applied Physics Letters;9/25/2017, Vol. 111 Issue 13, p133902-1
Academic Journal
Liquid-like mobile Cu+ ions are generally considered as phonon scatters in copper chalcogenide superionic conductors, but this is recently disproved by a neutron spectroscopy study on lattice dynamics of Cu2Se compound [Voneshen et al., Phys. Rev. Lett. 17, 118 (2017)]. In this work, we provide a different perspective by investigating the thermal transport of three transformable polymorphs of Cu2S compounds with varying Cu+ content. We show that the disordered and mobile Cu+ ions are not the primary factor for suppressing the heat transport. A notable dependence of thermal conductivity on Cu+ content is observed. By correlating the electrically deducted thermal conductivity with the ion motion behavior for β-Cu2S superionic phase, we reveal that these fast ionic species Cu+ are heat carriers instead, which make an appreciable contribution to thermal conduction.


Related Articles

  • Lattice dynamics and elasticity of silver thiogallate (AgGaS[sub 2]) from ab initio calculations. Laz˙ewski, J.; Parlinski, K. // Journal of Chemical Physics;4/15/2001, Vol. 114 Issue 15 

    Using first principle calculations within the local density approximation with either norm-conserving nonlocal or ultrasoft pseudo-potentials the structural parameters of AgGaS[sub 2] were calculated. The phonon dispersion relations were determined from Hellmann-Feynman forces with the direct...

  • Effect of phonon scattering from neutral and charged impurity centers on the lattice heat conductivity of PbTe:(Tl, Na). Zhitinskaya, M. K.; Nemov, S. A.; Ravich, Yu. I. // Physics of the Solid State;Jul98, Vol. 40 Issue 7, p1098 

    Experimental data on the effect of thallium and sodium impurities on the lattice heat conductivity of PbTe at room temperature are reported. Because the lattice of lead chalcogenides is strongly polarized near charged impurities, the effect of impurities on the lattice heat conductivity depends...

  • Ab initio study of lattice instabilities of zinc chalcogenides ZnX (X=O, S, Se, Te) induced by ultrafast intense laser irradiation. Dahua Ren; Baoyan Xiang; Yanjun Gao; Cheng Hu; Hong Zhang // AIP Advances;2017, Vol. 7 Issue 9, p095021-1 

    Ab initio calculations of lattice constants, lattice stabilities of ZnX (X=O, S, Se, Te) at different electronic temperatures (Te) have been performed using generalized gradient approximation (GGA) pseudopotential method within the density functional theory (DFT). The calculated phonon...

  • Lattice dynamics and structure of GeTe, SnTe and PbTe. Bauer Pereira, Paula; Sergueev, Ilya; Gorsse, Stéphane; Dadda, Jayaram; Müller, Eckhard; Hermann, Raphaël P. // Physica Status Solidi (B);Jul2013, Vol. 250 Issue 7, p1300 

    The lattice dynamics in the IV-VI compounds GeTe, SnTe and PbTe were studied by 125Te and 119Sn nuclear inelastic scattering and the obtained partial density of phonon states were compared with published theoretical calculations. The phase purity and structure were characterized by high energy...

  • ACOUSTICAL CHARACTERIZATION OF NANOSTRUCTURED METAL. SINGH, R. K.; SINGH, R. P.; SINGH, M. P. // International Journal of Nanoscience;Dec2008, Vol. 7 Issue 6, p315 

    Ultrasonic attenuation due to phonon–phonon interaction, thermoelastic loss and dislocation damping arising from screw and edge dislocations has been evaluated in nanocrystalline copper (13 nm) in the temperature range 50–500 K, and size-dependent attenuation at a constant...

  • Phonons in Ge nanowires. Peelaers, H.; Partoens, B.; Peeters, F. M. // Applied Physics Letters;9/21/2009, Vol. 95 Issue 12, p122110 

    The phonon spectra of thin freestanding, hydrogen passivated, Ge nanowires are calculated by ab initio techniques. The effect of confinement on the phonon modes as caused by the small diameters of the wires is investigated. Confinement causes a hardening of the optical modes and a softening of...

  • Interplay of electrons and phonons in heavily doped GaN epilayers. Demangeot, F.; Frandon, J.; Renucci, M. A.; Meny, C.; Briot, O.; Aulombard, R. L. // Journal of Applied Physics;8/1/1997, Vol. 82 Issue 3, p1305 

    Analyzes the effect of electrons on the lattice dynamics of unintentionally heavily doped gallium nitride (GaN) using Raman spectroscopy. Influence of deposition temperature of GaN buffer layers on sapphire substrates; Charge density fluctuations; Interaction of LO phonon and plasma; Scattering...

  • Spectral phonon conduction and dominant scattering pathways in graphene. Singh, Dhruv; Murthy, Jayathi Y.; Fisher, Timothy S. // Journal of Applied Physics;Nov2011, Vol. 110 Issue 9, p094312 

    In this paper, we examine the lattice thermal conductivity and dominant phonon scattering mechanisms of graphene. The interatomic interactions are modeled using the Tersoff interatomic potential and perturbation theory is applied to calculate the transition probabilities for three-phonon...

  • Thermal conduction in AlxGa1-xN alloys and thin films. Liu, Weili; Balandin, Alexander A. // Journal of Applied Physics;4/1/2005, Vol. 97 Issue 7, p073710 

    We report on experimental and theoretical investigation of thermal conduction in AlxGa1-xN alloys. A focus of this study is on understanding the effect of the Al mass fraction x and temperature on thermal conductivity in AlxGa1-xN thin films. The thermal conductivity of a set of AlxGa1-xN thin...

  • Effects of composition and phonon scattering mechanisms on thermal transport in MFI zeolite films. Hudiono, Yeny; Greenstein, Abraham; Saha-Kuete, Carine; Olson, Brandon; Graham, Samuel; Nair, Sankar // Journal of Applied Physics;9/1/2007, Vol. 102 Issue 5, p053523 

    We report a systematic study that reveals the effect of composition (silicon-to-aluminum ratio) and the role of different phonon scattering processes on thermal transport in the nanoporous zeolite MFI. This is accomplished via synthesis of a series of films with graded compositions, thermal...


Read the Article


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

Try another library?
Sign out of this library

Other Topics