Publications

Pre-prints.

  • R. Valdés Aguilar, A. Azad, J. Bowlan, S-W. Cheong, A.J. Taylor, D.A. Yarotski, R.P. Prasankumar. Slow relaxation of photo-carriers and their coupling to magnons in multiferroic Eu0.75Y0.25MnO3. In preparation (2017).
  • A.M. Potts, T.T. Mai, M.T. Warren, and R. Valdés Aguilar. Corrective Re-gridding techniques for non-uniform sampling in time-domain terahertz spectroscopy. In preparation (2017).
  • E.V. Jasper, M.T. Warren, T.T. Mai, J. Brangham, J.M. Shin, R.L. Greene, I. Takeuchi, and R. Valdés Aguilar. Time-domain terahertz studies of thin film spinel superconductor LiTi2O4. In preparation (2017).
  • D.M. Heligman, A.M. Potts, N. Crescimanno, M.T. Warren, E.V. Jasper, T.T. Mai, and R. Valdés Aguilar. Size and periodicity effects on Terahertz gammadion metamaterials. In preparation (2017).
  • E.V. Jasper, T.T. Mai, M.T. Warren, R.K. Smith, D.M. Heligman, and R. Valdés Aguilar. Broadband circular polarization in time-domain terahertz spectroscopy. In preparation (2017).

Peer Reviewed.

  • Matthew T. Warren, G. Pokharel, A. D. Christianson, D. Mandrus, and R. Valdés Aguilar. Terahertz dielectric analysis and spin-phonon coupling in multiferroic GeV4S8. Phys. Rev. B. 96, 054432 (2017) (link).
  • P. Bowlan, J. Bowlan, S. A. Trugman, R. Valdés Aguilar, J. Qi, X. Liu, J. Furdyna, M. Dobrowolska, A. J. Taylor, D. A. Yarotski, and R. P. Prasankumar. Probing and controlling terahertz-driven structural dynamics with surface sensitivity. Optica, 4, 383 (2017) (link).
  • Thuc T. Mai, C. Svoboda, M. T. Warren, T.-H. Jang, J. Brangham, Y. H. Jeong, S.-W. Cheong, and R. Valdés Aguilar. Terahertz spin-orbital excitations in the paramagnetic state of multiferroic Sr2FeSi2O7. Phys. Rev. B. 94, 224416 (2016) (link)
  • L. Wu, W-K. Tse, M. Brahlek, C.M. Morris, R. Valdés Aguilar, N. Koirala, S. Oh, and N.P. Armitage. High-Resolution Faraday Rotation and Electron-Phonon Coupling in Surface States of the Bulk-Insulating Topological Insulator Cu0.02Bi2Se3. Phys. Rev. Lett. 115, 217602 (2015) (link). (PhysRevLett.115.217602) (supplemental)
  • R. Valdés Aguilar, J. Qi, M. Brahlek, N. Bansal, A. Azad, S. Oh, J. Bowlan, A.J. Taylor, R.P. Prasankumar, D.A. Yarotski. Time-resolved terahertz dynamics in thin films of the topological insulator Bi2Se3. App. Phys. Lett. 106, 011901 (2015). (link) (1.4905438)
  • C.M. Morris, R. Valdés Aguilar, A. Ghosh, S.M. Koopayeh, J. Krizan, R.J. Cava, O. Tchernyshyov, T.M. McQueen, N.P. Armitage. Hierarchy of bound states in the 1D ferromagnetic Ising chain CoNb2O6 investigated by high resolution time-domain terahertz spectroscopy. Phys. Rev. Lett. 121, 137403 (2014). (link) (PhysRevLett.112.137403) (supplemental)
  • L. Wu, R. Valdés Aguilar, et alA sudden collapse in the transport lifetime across the topological phase transition in (Bi1-xInx)2Se3. Nature Physics, 9, 410, 2013. (link) (nphys2647) (supplemental)
  • R. Valdés Aguilar, et alAging and reduced bulk conductance in thin films of the topological insulator Bi2Se3. Journal of Applied Physics. 113, 153702 2013. (link) (1.4801911)
  • G. Bossé, L.S. Bilbro, R. Valdés Aguilar, et al. Low energy electrodynamics of the Kondo-lattice antiferromagnet CeCu2Ge2. Physical Review B. 85, 155105, 2012. (link) (PhysRevB.85.155105)
  • C.M. Morris, R. Valdés Aguilar, et al. Polarization modulation time-domain terahertz polarimetry. Optics Express. 20, 12303, 2012. (link) (oe-20-11-12303)
  • R. Valdés Aguilar, et al. Terahertz Response and Colossal Kerr Rotation from the Surface States of the Topological Insulator Bi2Se3. Physical Review Letters. 108, 087403, 2012. (link) (PhysRevLett.108.087403) (supplemental)
  • W. Liu, R. Valdés Aguilar, et al. Broadband microwave and time-domain terahertz spectroscopy of chemical vapor deposition grown graphene. J. Appl. Phys. 110, 083510, 2011. (link) (1.3651168)
  • L.S. Bilbro, R. Valdés Aguilar, et al. On the possibility of fast vortices in the cuprates: A vortex plasma model analysis of THz conductivity and diamagnetism in La2-xSrxCuO4. Physical Review B. 84, 100511, 2011. (link) (PhysRevB.84.100511) (supplemental)
  • L.S. Bilbro, R. Valdés Aguilar, et al. Temporal correlations of superconductivity above the transition temperature in La2−xSrxCuO4 probed by terahertz spectroscopy. Nature Physics, 7, 298, 2011. (link) (nphys1912) (supplemental)
  • R. Valdés Aguilar, et al. Pair-breaking effects and coherence peak in the terahertz conductivity of superconducting BaFe2−2xCo2xAs2 thin films. Physical Review B. 82, 180514, 2010. (link) (PhysRevB.82.180514)
  • R. Valdés Aguilar, et al. Origin of Electromagnon Excitations in Multiferroic RMnO3. Physical Review Letters. 102, 047203, 2009. (link) (PhysRevLett.102.047203)
  • A.B. Sushkov, M. Mostovoy, R. Valdés Aguilar, et al. Electromagnons in multiferroic RMn2O5 compounds and their microscopic origin. J. Phys. Condens. Matter. 20, 434210, 2008. (link) (cm8_43_434210)
  • R. Valdés Aguilar, et al. Spin-phonon coupling in frustrated magnet CdCr2O4. Physical Review B, 77, 092412, 2008. (link) (PhysRevB.77.092412)
  • R. Valdés Aguilar, et al. Colossal Magnon-Phonon Coupling in Multiferroic Eu0.75Y0.25MnO3. Physical Review B, 76, 060404, 2007. (link) (PhysRevB.76.060404)
  • A.B. Sushkov, R. Valdés Aguilar, et al. Electromagnons in Multiferroic YMn2O5 and TbMn2O5. Physical Review Letters. 98, 027202, 2007. (link) (PhysRevLett.98.027202)
  • R. Valdés Aguilar, et al. Infrared Phonon Signatures of Multiferroicity in TbMn2O5. Physical Review B. 74, 184404, 2006. (link) (PhysRevB.74.184404)