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In this page

• Habilitations à Diriger des Recherches
• Thèses
• Papers [2018][2017][2016][2015][2014][2013][2012][2011][2010][2009][2008][2007][2006] [2005] [2004] [2003] [2002] [2001] [2000]

Habilitations à Diriger des Recherches

2005 (July 4) - Ricardo Lobo - Du Continu à l'Ultraviolet: Diffusion Elastique de la Lumière dans les Oxydes [in French - pdf file (4.7 MB)]

Thèses

• 2011 (December 8) - Yaomin Dai - Optical properties of Ba122 iron-based superconductors [in English (except for title page and abstract) - pdf file (11.1 MB)].
• 2010 (September 17) - Renaud Schleck - Optical response of multiferroic materials [in French - pdf file (12.8 MB)].
• 2004 (September 17) - Alexandre Zimmers - Etude par Spectroscopie Infrarouge de l'Electrodynamique du Supraconducteur Pr_2−xCe_xCuO₄ et de la Manganite La_2/3Ca_1/3MnO₃ [in French - pdf file (17.4 MB)]
• 2002 (January 25) - Andrès F. Santander-Syro - Electrodynamique dans l'état normal et supraconducteur de Bi₂Sr₂CaCu₂O_8+δ: Etude par spectroscopie infrarouge-visible [in French - pdf file (5.8 MB)]

Papers

[2018]

• Raman and infrared spectroscopic investigations of a ferroelastic phase transition in Ba₂ZnTeO₆ double perovskite, R.L. Moreira, R.P.S.M. Lobo, S.L.L. Ramos, M.T. Sebastian, F.M. Matinaga, A. Righi, and A. Dias, Phys. Rev. Materials 2, 054406 (2018). [PRM page]
• Optical study of Dirac Fermions and related phonon anomalies in antiferromagnetic compound CaFeAsF, B. Xu, H. Xiao, B. Gao, Y.H. Ma, G. Mu, P. Marsik, E. Sheveleva, F. Lyzwa, Y.M. Dai, R.P.S.M. Lobo, and C. Bernhard, Phys. Rev. B 97, 195110 (2018). [PRB page]
• TeraHertz HgTe nanocrystals: beyond confinement, N. Goubet, A. Jagtap, C. Livache, B. Martinez, H. Portalès, X.Z. Xu, R.P.S.M. Lobo, B. Dubertret, and E. Lhuillier, J. Am. Chem Soc. 140, 5033(2018). [JACS page]
• Infrared dispersion analysis and Raman scattering spectra of taurine single crystals, R.L. Moreira, R.P.S.M. Lobo, and A. A.Dias, Spectrochim. Acta Mol. Biomol. Spectrosc. 188, 276 (2018). [Spectrochimica page]

[2017]

• HgSe self-doped nanocrystals as a platform to investigate the effects of vanishing confinement, B. Martinez, C. Livache, L.D.N. Mouafo, N. Goubet, S. Keuleyan, H. Crugel, S. Ithurria, H. Aubin, A. Ouerghi, B. Doudin, E. Lacaze, B. Dubertret, M.G. Silly, R.P.S.M. Lobo, J.F. Dayen, and E. Lhuillier, ACS Appl. Mater. Interfaces 9, 36173 (2017). [ACS page]
• Infrared probe of the gap evolution across the phase diagram of Ba_1-xK_xFe₂As₂, B. Xu, Y.M. Dai, H. Xiao, B. Shen, H.H. Wen, X.G. Qiu, and R.P.S.M. Lobo, Phys. Rev. B 96, 115125 (2017). [PRB page]
• Dielectric properties of amorphous phase change materials, C. Chen, P. Jost, H. Volker, M. Kaminski, M. Wirtssohn, U. Engelmann, K. Krüger, F. Schlich, C. Schlockermann, R.P.S.M. Lobo, and M. Wuttig, Phys. Rev. B 95, 094111 (2017). [PRB page]

[2016]

• Optical observation of spin-density-wave fluctuations in Ba122 iron-based superconductors, B. Xu, Y.M. Dai, H. Xiao, B. Shen, Z.R. Ye, A. Forget, D. Colson, D.L. Feng, H.H. Wen, X.G. Qiu, and R.P.S.M. Lobo, Phys. Rev. B 94, 085147(2016). [PRB page]

[2015]

• Optical Conductivity of URu₂Si₂} in the Kondo Liquid and Hidden Order Phases, R.P.S.M. Lobo, C.C. Homes, J. Buhot, M.A. Méasson, D. Aoki, G. Lapertot, and P. Lejay, Phys. Rev. B 92, 045129 (2015). [PRB page]
• Optical conductivity evidence of clean-limit superconductivity in LiFeAs, R.P.S.M. Lobo, G. Chanda, A.V. Pronin, J. Wosnitza, S. Kasahara, T. Shibauchi, and Y. Matsuda, Phys. Rev. B 91, 174509 (2015). [PRB page]
• Optical conductivity of mayenite: from insulator to metal, R.P.S.M. Lobo, F. Corré. N. Bontemps, M.I. Bertoni. T.O. Mason. K.R. Poeppelmeier, A.J. Freeman, M.S. Park, and J.E. Medvedeva, J. Phys. Chem C 119, 8849 (2015). [JPCC page]
• Anomalous phonon red shift in K-doped BaFe₂As₂ iron-pnictides, B. Xu, Y.M. Dai, B. Shen, H. Xiao, Z.R. Ye, A. Forget, D. Colson, D.L. Feng, H.H. Wen, C.C. Homes, X.G. Qiu, and R.P.S.M. Lobo, Phys. Rev. B 91, 104510 (2015). [PRB page]
• Optical phonon features of triclinic montebrasite: dispersion analysis and non-polar Raman modes, R.M. Almeida, S. Höfer, T. Mayerh\"ofer, K. Krambrock, R.P.S.M. Lobo, A. Dias, and R.L. Moreira, Vib. Spectrosc. 77, 25 (2015). [Vib. Spectrosc. page]
• Lattice dynamics of the heavy fermion compound URu₂Si₂, J. Buhot, M.A. Méasson, Y. Gallais, M. Cazayous, A. Sacuto, F. Bourdarot, S. Raymond, G. Lapertot, D. Aoki, L.P. Regnault, S. Ivanov, P.Perkarz, K. Parlinski, D. Legut, C.C. Homes, P. Lejay, and R.P.S.M. Lobo, Phys. Rev. B 91, 035129(2015). [PRB page]
• Eliashberg analysis of the optical conductivity in superconducting Pr₂2CuO_x with x ~ 4, E. Schachinger, G. Chanda, R.P.S.M. Lobo, M. Naito, and A.V. Pronin, J. Phys.: Condens. Matter 27,045702 (2015). [JPCM page]

[2014]

• Optical properties of iron arsenic superconductor BaFe₂(As_0.7P_0.3)₂, B. Xu, Y.M. Dai, Z.R. Ye, D.L. Feng, X.G. Qiu, and R.P.S.M. Lobo, Chinese Phys. B 23, 087401 (2014). [Chinese Phys. page]
• Optical study of superconducting Pr₂2CuO_x with x ~ 4, G. Chanda, R.P.S.M. Lobo, E. Schachinger, J. Wosnitza, M. Naito, and A.V. Pronin, Phys. Rev. B 90, 024503 (2014). [PRB page]

[2013]

• Optical Conductivity of Ba_0.6K_0.4Fe₂As₂: The Effect of in-plane and out-of-plane doping in the superconducting gap, Y.M. Dai, B. Xu, B. Shen, H.H. Wen, X.G. Qiu, and R.P.S.M. Lobo, EPL 104, 47006 (2013). [EPL page]
• Hidden T-linear scattering rate in Ba_0.6K_0.4Fe₂As₂ revealed by optical spectroscopy, Y.M. Dai, B. Xu, B. Shen, X. Xiao, H.H. Wen, X.G. Qiu, C.C. Homes, and R.P.S.M. Lobo, Phys. Rev. Letters 111, 117001 (2013). [PRL page]

[2012]

• Optical spectroscopy shows that the normal state of URu₂Si₂ is an anomalous Fermi liquid, U. Nagel, T. Uleksin, T. Rõõm, R.P.S.M. Lobo, P. Lejay, C.C. Homes, J.S. Hall, A.W. Kinross, S. Purdy, T. Munsie, T.J. Williams, G.M. Luke, and T. Timusk, Proc. Natl. Acad. Sci. USA 109, 19161 (2012). [PNAS page]
• Pseudogap in underdoped Ba_1-xK_xFe₂As₂ as seen via optical conductivity, Y.M. Dai, B. Xu, B. Shen, H.H. Wen, J.P. Hu, X.G. Qiu, and R.P.S.M. Lobo, Phys. Rev. B 86, 100501(R) (2012) [PRB page]
• Evolution of the 251 cm^-1 infrared phonon mode with temperature in Ba_0.6K_0.4Fe₂As₂, Y.M. Dai, B. Xu, B. Shen, H. Xiao, R.P.S.M. Lobo, and X.G. Qiu; Chinese Phys. B 21, 077403 (2012). [Chinese Physics page]
• Doping evolution of the optical scattering rate and effective mass of Bi₂Sr_2-xLa_xCuO₆, Y.M. Dai, B. Xu, P. Cheng, H.Q. Luo, H.H. Wen, X.G. Qiu, and R.P.S.M. Lobo; Phys. Rev. B 85, 092504 (2012). [PRB page]

[2011]

• Raman and Infrared Phonon Features in a Designed Cubic Polymorph of CaTa₂O₆, N.G. Teixeira, R.L. Moreira, R.P.S.M. Lobo, M.R.B. Andreeta, A.C. Hernandes and A. Dias; Cryst. Growth Des. 11, 5567-5573 (2011). [CGD page]
• Colloidal nanoplatelets with two-dimensional electronic structure, S. Ithurria, M.D. Tessier, B. Mahler, R.P.S.M. Lobo, B. Dubertret and A.L. Efros; Nature Mater. 10, 936-941 (2011) [Nature Materials page]
• Intrinsic and extrinsic dielectric responses of CaCu₃Ti₄O₁₂ thin films, C.P.L. Rubinger, R.L. Moreira, G.M. Ribeiro, F.M. Matinaga, S. Autier Laurent, B. Mercey and R.P.S.M. Lobo; J. Appl. Phys.110, 074102 (2011). [JAP page]

[2010]

• Infrared reflectivity of the phonon spectra in multiferroic TbMnO₃, R. Schleck, R.L. Moreira, H. Sakata and R.P.S.M. Lobo; Phys. Rev. B 82, 144309 (2010). [PRB page]
• Optical signature of subgap absorption in the superconducting state of Ba(Fe_1-xCo_x)₂As₂, R.P.S.M. Lobo, Y.M. Dai, U. Nagel, T. Rõõm, J.P. Carbotte, T. Timusk, A. Forget and D. Colson; Phys. Rev. B 82, 100506 (2010). [PRB page]
• Elastic and magnetic effects on the infrared phonon spectra of MnF₂, R. Schleck, Y. Nahas, R.P.S.M. Lobo, J. Varignon, M.B. Lepetit, C.S. Nelson and R.L. Moreira; Phys. Rev. B 82, 054412 (2010). [PRB page]

[2009]

• Polar phonons and spin excitations coupling in multiferroic BiFeO₃ crystals, P. Rovillain, M. Cazayous, Y. Gallais, A. Sacuto, R.P.S.M. Lobo, D. Lebeugle and D. Colson; Phys. Rev. B 79, 180411 (2009). [PRB page]
• Microwave and infrared dielectric properties of Sr_1-3x/2Ce_xTiO₃ (x = 0.154 to 0.400) incipient ferroelectrics at cryogenic temperatures, R.L. Moreira, R. Lobo, G. Subodh, M. Sebastian, M. Jacob and A. Dias; J. Phys. D: Appl. Phys. 42, 075411 (2009). [JPD page]
• Exchange boson dynamics in cuprates: Optical conductivity of HgBa₂CuO_4+δ, J. Yang, J. Hwang, E. Schachinger, J.P. Carbotte, R.P.S.M. Lobo, D. Colson, A. Forget, and T. Timusk, Phys. Rev. Letters 102, 027003 (4 pp.) (2009). [PRL page]

[2008]

• Multiple bosonic mode coupling in the charge dynamics of the electron-doped superconductor (Pr_2-xCe_x)CuO₄, E. Schachinger, C.C. Homes, R.P.S.M. Lobo, and J.P. Carbotte, Phys. Rev. B 78, 134522 (10 pp.) (2008). [PRB page]
• Metallic Nature of Strained Single-Crystal La_2/3Sr_1/3MnO₃ Films, A.M. Haghiri-Gosnet, M. Kouba, A.F. Santander-Syro, R.P.S.M. Lobo, P. Lecoeur, B. Mercey, Phys. Rev. B 78, 115118 (5 pp.) (2008). [PRB page]
• Crystal structure, Raman spectroscopy, far-infrared, and microwave dielectric properties of (1-x)La(MgSn)_0.5O₃ - xNd(MgSn)_0.5O₃ system, G. Santosh Babu, V. Subramanian, V.R.K. Murthy, R.L. Moreira, and R.P.S.M. Lobo, J. Appl. Phys. 103, 084104 (7 pp.) (2008). [JAP page]

[2007]

• Optical Phonon Modes and Dielectric Behavior of Sr_1−3x/2Ce_xTiO₃ Microwave Ceramics, R.L. Moreira, R.P.S.M. Lobo, G. Subodh, M.T. Sebastian, F.M. Matinaga, and A. Dias, Chem. Mat. 19, 6548-6554 (2007). [Chem. Mat. page]
• Infrared phonon dynamics of multiferroic BiFeO₃ single crystal, R.P.S.M. Lobo, R.L. Moreira, D. Lebeugle, and D. Colson, Phys. Rev. B 76, 172105 (4 pp.) (2007). [PRB page]
• Silicon beamsplitter for far-infrared and terahertz spectroscopy, C.C. Homes, G.L. Carr, R.P.S.M. Lobo, J.D. LaVeigne, and D.B. Tanner, Appl. Optics 46, pp. 7884-7888 (2007). [Appl. Optics page]
• Optical Spectroscopy as a Probe of Gaps and Kinetic Electronic Energy in p- and n-type cuprates, N. Bontemps, Physica C 460-462, pp. 162-165 (2007). [Physica C page]

[2006]

• Optical determination of the superconducting energy gap in electron-doped Pr_1.85Ce_0.15CuO₄, C.C. Homes, R.P.S.M. Lobo, P. Fournier, A. Zimmers, and R.L. Greene, Phys. Rev. B 74, 214515 (8 pp.) (2006). [PRB page]
• Temperature dependence of the spectral weight in p- and n-type cuprates: A study of normal state partial gaps and electronic kinetic energy, N. Bontemps, R.P.S.M. Lobo, A. F. Santander-Syro, and A. Zimmers, Ann. Phys. 321, 1547-1558 (2006). [Ann. Phys. page]

[2005]

• Kinetic energy change with doping upon superfluid condensation in high temperature superconductors, G. Deutscher, A.F. Santander-Syro, and N. Bontemps, Phys. Rev. B 72, 092504 (3 pp.) (2005) [PRB page]
• Mott physics and the optical conductivity of electron-doped cuprates, A.J. Millis, A. Zimmers, R.P.S.M. Lobo, N. Bontemps, C.C. Homes, Phys. Rev. B 72, 224517 (13 pp.) (2005). [PRB page]
• Photoinduced time-resolved electrodynamics of superconducting metals and alloys, R.P.S.M. Lobo, J.D. LaVeigne, D.H. Reitze, D.B. Tanner, Z.H. Barber, E. Jacques, P. Bosland, M.J. Burns, and G.L. Carr, Phys. Rev. B 72, 024510 (10 pp.) (2005). [PRB page]
• Infrared properties of electron-doped cuprates: Tracking normal-state gaps and quantum critical behavior in Pr_2−xCe_xCuO₄, A. Zimmers, J.M. Tomczak, R.P.S.M. Lobo, N. Bontemps, C.P. Hill, M.C. Barr, Y. Dagan, R.L. Greene, A.J. Millis, and C.C. Homes, Europhys. Lett. 70, pp. 225-231 (2005). [EPL page]
• Optical conductivity spectra of conducting oxides including high-T_c cuprates, F. Gervais, Vinh Ta Phuoc, N. Poirot, C. Coquelet, G. Gruener, R.P.S.M. Lobo, Int. J. Mod. Phys. 19, 153-157 (2005). From: 5th International Conference on New Theories, Discoveries and Applications of Superconductors and Related Materials (New3SC-5), Chongqing, China.
• Interband scattering in MgB₂, R.P.S.M. Lobo, M. Elsen, P. Monod, J.J. Tu, E.M. Choi, H.J. Kim, W. N. Kang, S.I. Lee, R.J. Cava, and G.L. Carr, New Challenges in Superconductivity: Experimental Advances and Emerging Theories, pp. 243-248. NATO Science Series II, Springer (2005). From: 2004 University of Miami Workshop on Unconventional Superconductivity, Ed. J. Ashkenazi, Miami, FL, 11-16 Jan. 2004.
• Optical properties of (Pr,Ce)₂CuO₄, A. Zimmers, N. Bontemps, R.P.S.M. Lobo, C.P. Hill, M.C. Barr, R.L. Greene, C.C. Homes, and A.J. Millis, New Challenges in Superconductivity: Experimental Advances and Emerging Theories, pp. 27-30. NATO Science Series II, Springer (2005). From: 2004 University of Miami Workshop on Unconventional Superconductivity, Ed. J. Ashkenazi, Miami, FL, 11-16 Jan. 2004.
• Sum rules and energy scales in BiSrCaCuO, A.F. Santander-Syro, R.P.S.M. Lobo, N. Bontemps, New Challenges in Superconductivity: Experimental Advances and Emerging Theories, pp. 21-26. NATO Science Series II, Springer (2005). From: 2004 University of Miami Workshop on Unconventional Superconductivity, Ed. J. Ashkenazi, Miami, FL, 11-16 Jan. 2004.

[2004]

• Infrared Signature of the Superconducting State in Pr_2−xCe_xCuO₄, A. Zimmers, R.P.S.M. Lobo, N. Bontemps, C.C. Homes, M.C. Barr, Y. Dagan, and R.L. Greene, Phys. Rev. B 70, 132502 (4 pp.) (2004). [PRB page]
• The in-plane electrodynamics of the superconductivity in Bi₂Sr₂CaCu₂O_8+δ: energy scales and spectral weight distribution, A.F. Santander-Syro, R.P.S.M. Lobo, N. Bontemps, W. Lopera, D. Giratá, Z. Konstantinovic, Z.Z. Li, and H. Raffy, Phys. Rev. B 70, 134514 (14 pp.) (2004). [PRB page]
• Iodine insertion in pentacene thin films investigated by infrared and Raman spectroscopy, M. Cazayous, A. Sacuto, G. Horowitz, Ph. Lang, A. Zimmers, and R.P.S.M. Lobo, Phys. Rev. B 70, 081309(R) (4 pp.) (2004). [PRB page]
• Transparent Conducting Oxides: Texture and Microstructure Effects on Charge Carrier Mobility in MOCVD-Derived CdO Thin Films Grown with a Thermally Stable, Low-Melting Precursor, A.W. Metz, J.R. Ireland, J.G. Zheng, R.P.S.M. Lobo, Y. Yang, J. Ni, C.L. Stern, V.P. Dravid, N. Bontemps, C.R. Kannewurf, K.R. Poeppelmeier, and T.J. Marks, J. Am Chem. Soc. 126, pp. 8477-8492 (2004). [JACS page]
• Reflectivity of optimally doped and underdoped Pr_2−xCe_xCuO_4−δ, A. Zimmers, R P.S.M. Lobo, N. Bontemps, C. P. Hill, and R. L. Greene, Physica C 408-410, pp. 748-749 (2004). [Physica C page]
• Energy scales of the excitations associated with superconductivity: an analysis of the infrared–visible in-plane response of Bi₂Sr₂CaCu₂O_8+δ, A.F. Santander-Syro, R.P.S.M. Lobo, N. Bontemps, Z. Konstantinovic, Z. Z. Li and H. Raffy, Physica C 408-410, pp. 721-724 (2004). [Physica C page]

[2003]

• Overdamped interlayer exchange coupling and disorder dominated magnetoresistance in La_0.7Ca_0.3MnO₃/LaNiO₃ superlattices, P. Padhan, R.C. Budhani and R.P.S.M. Lobo, Europhys. Lett. 63, pp. 771-777 (2003). [EPL page]
• Pairing in cuprates from high energy electronic states, A.F. Santander-Syro, R.P.S.M. Lobo, N. Bontemps, Z. Konstantinovic, Z.Z. Li and H. Raffy; Europhys. Lett. 62, pp. 568-574 (2003). [EPL page]
• Electric-field-tuned metallic fraction and dynamic percolation in a charge-ordered manganite, N. K. Pandey, R. P. S. M. Lobo and R. C. Budhani; Phys. Rev. B 67, 054413 (4 pp.) (2003). [PRB page]

[2002]

• Absence of a loss of in-plane infrared spectral weight in the pseudo-gap regime of Bi₂Sr₂CaCu₂O_8+δ, A.F. Santander-Syro, R.P.S.M. Lobo, N. Bontemps, Z. Konstantinovic, Z.Z. Li and H. Raffy; Phys. Rev. Letters 88, 097005 (4 pp.) (2002). [PRL page]
• Localization by disorder in the infrared conductivity of (Y,Pr)Ba₂Cu₃O₇, R.P.S.M. Lobo, E. Ya. Sherman, D. Racah, Y. Dagan and N. Bontemps; Phys. Rev. B 65, 104509 (6 pp.) (2002). This note is also available. [PRB page]
• Electric- and magnetic-field-driven nonlinear charge transport and magnetic ordering in epitaxial films of Pr_0.7Ca_0.3−xSr_xMnO₃, R.C. Budhani, N.K. Pandey, P. Padhan, S. Srivastava and R.P.S.M.Lobo, Phys. Rev. B 65, 014429 (10 pp.) (2002). [PRB page]
• Energy scales of the excitations associated with superconductivity: an analysis of the infrared and visible in-plane response of Bi₂Sr₂CaCu₂O_8+δ, A. F. Santander-Syro, R. P. S. M. Lobo, N. Bontemps, Z. Konstantinovic, Z. Z. Li and H. Raffy, SPIE Superconducting and Related Oxides: Physics and Nanoengineering V Proc., Vol. 4811, pp. 48-59 (2002). From: Superconducting and Related Oxides: Physics and Nanoengineering V, Ed. I. Bozovic, D. Pavuna, Seattle, WA, USA, 8-11 July 2002.

[2001]

• Pseudo-gap and superconducting condensate energies in the infrared spectra of Pr doped YBa₂Cu₃O₇, R.P.S.M. Lobo, N. Bontemps, D. Racah, Y. Dagan and G. Deutscher, Europhys. Lett. 55, pp. 854-860 (2001). [EPL page]

[2000]

• Infrared reflectivity spectra of underdoped and optimally doped Bi₂Sr₂CaCu₂O_8+δ thin films, A. F. Santander-Syro, R.P.S.M. Lobo, Z. Konstantinovic, Z.Z. Li, H. Raffy, and N. Bontemps, Physica C 341-348, pp. 915-916 (2000). [Physica C page]