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Related papers: Phonon Anharmonicity in Bulk $T_d$-MoTe$_2$

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The detailed temperature dependence of the infrared-active mode in Fe$_{1.03}$Te ($T_N\simeq 68$ K) and Fe$_{1.13}$Te ($T_N\simeq 56$ K) has been examined, and the position, width, strength, and asymmetry parameter determined using an…

Strongly Correlated Electrons · Physics 2016-05-18 C. C. Homes , Y. M. Dai , J. Schneeloch , R. D. Zhong , G. D. Gu

We report on the temperature dependent Raman spectroscopic studies of orthorombic distorted perovskite YCrO3 in the temperature range of 20-300K. Temperature dependence of DC-magnetization measurement under field cooled and zero field…

Materials Science · Physics 2013-09-30 Yogesh Sharma , Satyaprakash Sahoo , W. Perez , Ram S. Katiyar

High quality single crystals of Bi2Se3 were grown using a modified Bridgman technique, the detailed study were carried out using Raman spectroscopy and characterized by Laue diffraction and high resolution transmission electron microscopy.…

High-resolution angle-resolved photoemission spectroscopy and ultrafast optical pump-probe spectroscopy were used to study semimetallic 1T - TiTe2 quasiparticle dispersion and dynamics. A kink and a flat band, having the same energy scale…

The temperature and magnetic field dependence of lattice and carrier excitations in MnSi is studied in detail using inelastic light scattering. The pure symmetry components of the electronic response are derived from the polarization…

Strongly Correlated Electrons · Physics 2014-07-23 H. -M. Eiter , P. Jaschke , R. Hackl , A. Bauer , M. Gangl , C. Pfleiderer

We present a Raman scattering study of Ca$_2$RuO$_4$, in which we investigate the temperature-dependence of the lattice dynamics and the electron-phonon interaction below the metal-insulator transition temperature ({\it T}$_{\rm MI}$).…

Strongly Correlated Electrons · Physics 2009-11-11 H. Rho , S. L. Cooper , S. Nakatsuji , H. Fukazawa , Y. Maeno

Temperature dependence of vibrational modes in semiconductors depends on lattice thermal expansion and anharmonic phonon-phonon scattering. Evaluating the two contributions from experimental data is not straightforward, especially for…

Polarization- and temperature-dependent Raman data along with theoretical simulations are presented for the Kagome ferromagnet Fe_3Sn_2. Eight out of nine expected phonon modes were identified. The experimental energies compare well with…

We study anharmonic effects in MgB2 by comparing Inelastic X-ray and Ramanscattering together with ab-initio calculations. Using high statistics and high q resolution measurements we show that the E2g mode linewidth is independent of…

We conduct first-principles theoretical studies to investigate the temperature-dependent phonon properties of orthorhombic SrZrO$_3$ (SZO) perovskite. Our calculations include the quasiharmonic approximation, in which we explored mode…

Materials Science · Physics 2023-09-06 P. K. Verma

Time-resolved Raman spectroscopy has been applied to probe the anharmonic coupling and electron-phonon interaction of optical phonons in graphite. From the decay of the transient anti-Stokes scattering of the G-mode following ultrafast…

Materials Science · Physics 2015-05-14 Hugen Yan , Daohua Song

2H-TaSe2 is a model transition metal dichalcogenide material that develops charge density waves (CDWs).Here we present variable-temperature Raman spectroscopy study on both incommensurate charge density waves (ICDW) and optical phonon modes…

Materials Science · Physics 2017-12-13 Lin Cui , Qiaoling Huang , Gaomin Li , Yumeng You , Mingyuan Huang

The structural polymorphism in transition metal dichalcogenides (TMDs) provides exciting opportunities for developing advanced electronics. For example, MoTe$_2$ crystallizes in the 2H semiconducting phase at ambient temperature and…

We study the valence crossover and strong electron-phonon coupling of EuPd$_2$Si$_2$ by polarization-resolved Raman spectroscopy. The fully-symmetric phonon mode shows strongly asymmetric lineshape at low temperature, indicating Fano-type…

The effect of pressure on optical phonon frequencies of MgB$_2$ has been calculated using the frozen-phonon approach based on a pseudopotential method. Gr\"uneisen parameters of the harmonic mode frequencies are reported for the…

Superconductivity · Physics 2009-11-07 K. Kunc , I. Loa , K. Syassen , R. K. Kremer , K. Ahn

We report Raman spectra measurements on a MoS2 monolayer supported on SiO2 as a function of temperature. Unlike in previous studies, the positions of the two main Raman modes, E2g1 and A1g exhibited nonlinear temperature dependence.…

Mesoscale and Nanoscale Physics · Physics 2014-06-13 Andrzej Taube , Jarosław Judek , Cezariusz Jastrzębski , Anna Duzynska , Krzysztof Świtkowski , Mariusz Zdrojek

Recently colossal positive volume thermal expansion has been found in the framework compounds Ag3Co(CN)6 and Ag3Fe(CN)6. Phonon spectra have been measured using the inelastic neutron scattering technique as a function of temperature and…

Materials Science · Physics 2015-06-05 R Mittal , M. Zbiri , H. Schober , S. N. Achary , A. K. Tyagi , S. L. Chaplot

We report temperature-dependent Raman scattering and X-ray diffraction studies of pyrochlore iridates, (Eu$_{1-x}$Bi$_x$)$_2$Ir$_2$O$_7$, for x=0, 0.02, 0.035, 0.05 and 0.1. The temperature variation in Raman experiments spans from 4 K to…

Strongly Correlated Electrons · Physics 2022-03-14 Anoop Thomas , Prachi Telang , Kshiti Mishra , Martin Cesnek , Jozef Bednarcik , D V S Muthu , Surjeet Singh , A K Sood

Resonance Raman scattering, a very effective and sensitive technique for atomically thin semiconducting transition metal dichalcogenide, can be used to observe the phonons from the entire Brillouin zone. In addition to the significance of…

Materials Science · Physics 2023-02-06 Deepu Kumar , Nasaru Khan , Rahul Kumar , Mahesh Kumar , Pradeep Kumar

Inelastic light scattering studies on single crystal of electron-doped Ca(Fe0.95Co0.05)2As2 superconductor, covering the tetragonal to orthorhombic structural transition as well as magnetic transition at TSM ~ 140 K and superconducting…