Halasyamani Research Group


The Halasyamani research group collaborates with scientists throughout the United States and all over the world. We have one of the few research laboratories capable of measuring second-harmonic generation, piezoelectricity, ferroelectricity, and pyroelectricity on bulk and single crystal samples (Chem. Soc. Rev. 35, 710-717, 2006). We are also able to perform refractive index measurements (5 wavelengths) and Maker Fringe measurements on single crystals. Below is a partial list of scientists who have sent samples to Prof. Halasyamani for measurement.

Individuals interested in pursuing a collaboration with Prof. Halasyamani regarding these measurements are welcome to e-mail me at psh@uh.edu.

Recent Collaborative Papers

  • Zhang, R., Abbet, B.M., Read, G., Lang, F., Lancaster, T., Tran, T.T., Halasyamani, P.S., Blundell, S.J., Benedek, N.A., and Hayward, M.A., La2SrCr2O7: Controlling the tilting distortions of n = 2 Ruddlesden-Popper phases through A-site cation order, Inorg. Chem., In Press, 2016.
  • Kim, H.G., Tran, T.T., Choi, W., You, T.-S., Halasyamani, P.S., and Ok, K.M., Two New Noncentrosymmetric (NCS) n = 3 Layered Dion-Jacobson (DJ) Perovskites: Polar RbBi2Ti2NbO10 and Nonpolar CsBi2Ti2TaO10, Chem. Mater., 28, 2424-2432, 2016.
  • Morrison, G., Tran, T. T., Halasyamani, P.S., and zur Loye, H.-C., K8(K5F)U6Si8O40: The First Intergrowth Uranyl Silicate, Inorg. Chem., 55, 3215-3217, 2016.
  • Yaghoobnejad A. H., Morris, R., Tran, T. T., Halasyamani, P.S., Ghosh, K., and Choudhury, A., A Cubic Non-centrosymmetric Mixed-valence Iron Borophosphate-Phosphite, Cryst. Growth Des., 16, 1187-1194, 2016.
  • McCabe, E.E., Bousquet, E., Stockdale, C.P.J., Deacon, C.A., Tran, T.T., Halasyamani, P.S., Stennett, M.C., Hyatt, N.C., Synthesis, structure and properties of CsBi2Ti2NbO10: A new layered perovskite proper ferroelectric, Chem. Mater., 27, 8298-8309, 2015.
  • Gerke, B., Tran, T. T., Pottgen, R., and Halasyamani, P.S., 119Sn Mossbauer Spectroscopy of Solveothermally Synthesized Fluorides ASnF3 (A = Na, K, Rb, Cs), Z. Naturforsch., 70, 765-767, 2015.
  • Morrison, G., Smith, M.D., Tran, T.T., Halasyamani, P.S., and zur Loye, H.-C., Synthesis and Structure of a New Pentanary Uranium (VI) Silicate: K4CaUSi4O14, CrystEngComm., 17, 4218-4224, 2015.
  • Latshaw, A.M., Wilkins, B.O., Hughey, K.D., Yeon, J., Williams, D.E., Tran, T.T., Halasyamani, P.S., and zur Loye, H.-C., A5RE4X[TO4]4 Crystal Growth and Photoluminescene. Part 2. Fluoride Flux Synthesis of Sodium and Potassium Rare Earth Silicate Oxyfluorides, CrystEngComm, 17, 4654-4661, 2015.
  • Cortese, A., Wilkins, B., Smith, M., Yeon, J., Morrison, G., Tran, T.T., Halasyamani, P.S., and zur Loye, H.-C., Crystal Growth of Four Oxovanadium(IV) Tartrates Prepared via a Mild Two Step Hydrothermal Method: Observation of Spin Dimer Behavior and Second Harmonic Generation, Inorg. Chem., 54, 4011-4020, 2015.
  • Kim, Y.H, Tran, T.T., Halasyamani, P.S., and Ok, K.M., Macroscopic polarity control with alkali metal cation size and coordination environment in a series of tin iodates, Inorg. Chem. Frontiers, 2, 361-368, 2015.
  • Mandal, P., Manjob-Sanz, A., Corkett, A.J., Comyn, T.P., Dawson, K., Stevenson, T., Bennett, J., Henrichs, L.F., Bell, A.J., Nishibori, E., Takata, M., Zanella, M., Dolgos, M.R., Adem, U., Wan, X., Pitcher, M.J., Romani, S., Tran, T.T., Halasyamani, P.S., Claridge, J.B., and Rosseinsky, M.J., Morphotropic Phase Boundary in the Pb-Free (1-x)BiTi3/8Fe2/8Mg3/8O3 - xCaTiO3 System: Tetragonal Polarization and Enhanced Electromechanical Properties, Adv. Mater., 27, 2883-2889, 2015.
  • Donakowski, M.D., Gautier, R., Lu, H., Tran, T.T., Cantwell, J., Halasyamani, P.S., and Poeppelmeier, K.R., Synthesis of Two Vanadium Oxide-Fluoride Materials that Differ in Phase Matchability, Inorg. Chem., 54, 765-772, 2015.
  • Patino, M.A., Smith, M., Zhang, W., Halasyamani, P.S., and Hayward, M.A., Cation Exchange in a 3D Perovskite - Synthesis of Ni0.5TaO3, Inorg. Chem., 53, 8020-8024, 2014.
  • Greenblatt, M., Retuerto, M., Li, M., Ignatov, A., Croft, M., Hodges, J., Tran, T.T, and Halasyamani, P.S., Crystallographic and magnetic properties of Pb2-xBixIr2O7-d, Mat. Res. Express, 1, 046304/1 - 046304/12, 2014.
  • Aliev, A., Endara, D., Huve, M., Colmont, M., Roussel, P., Tran, T. T., Halasyamani, P.S., and Mentre, O., Labile degree of disorder in Bismuth-oxyphosphates compounds: illustration through three new structural types, Inorg. Chem., 53, 861-871, 2014.
  • Holland, M, Donakowski, M.D., Pozzi, E.A., Rasmussen, A.M., Tran, T.T., Pease-Dodson, S.E., Halasyamani, P.S., Seideman, T., Van Duyne, R.P., Poeppelmeier, K.R., Polar Alignment of Lambda-Shaped Basic Building Units within Transition Metal Oxide Fluoride Materials, Inorg. Chem., 53, 221-228, 2014.
  • Luo, K., Tran, T.T., Halasyamani, P.S., and Hayward, M.A., Synthesis and Selective Topochemical Fluorination of the cation and anion-vacancy ordered phases Ba2YCoO5 and Ba3YCo2O7.5, Inorg. Chem., 52, 13762-13769, 2013.
  • Retuerto, M., Li, M.R., Go, Y.B., Ignatov, A., Croft, M., Ramanujachary, K.V., Herber, R.H., Nowik, I., Hodges, J.P., Dachraui, W., Hadermann, J., Van Tendeloo, G., Tran, T.T., Halasyamani, P.S., Greenblatt, M., Polar and magnetic layered A-Site and rock salt B-Site Ordering NaLnFeWO6 (Ln = La, Nd) perovskites, Inorg. Chem, 52, 12482-12491, 2013.
  • Reger, D.L., Leitner, A., Smith, M.D., Tran, T.T., and Halasyamani, P.S., Homochiral Helical Metal-Organic Frameworks of Group 1 Metals using Enantiopure Ligands Containing a 1,8-Naphthalimide Group, Inorg. Chem., 52, 10041-10051, 2013.
  • Lu, Hongcheng; Gautier, Romain; Donakowski, Martin; Tran, T. Thao; Edwards, Bryce; Nino, Juan; Halasyamani, P. Shiv; Liu, Zhengtang; Poeppelmeier, Kenneth, Non-Linear Active Materials: An Illustration of Controllable Phase Matchability, J. Am. Chem. Soc., 135, 11942-11950, 2013.
  • Li, M.-R, Walker, D., Retuerto, M., Sarkar, T., Hadermann, J. Stephens, P.W., Croft, M., Ignatov, A., Hemberger, J., Nowik, I., Halasyamani, P.S., Tran, T.T., Mukherjee, S., Dasgupta, T.S., Greenblatt, M., Polar Mn2FeMO6 (M = Nb, Ta) with LiNbO3-type Structure - High Pressure Synthesis, Angew. Chemie, 52, 8406-8410, 2013.
  • Yeon, J., Sefat, A.A., Tran, T.T., Halasyamani, P.S., zur Loye, H.-C., Crystal Growth, Structure, Polarization and Magnetic Properties of Cesium Vanadate, Cs2V3O8: A Structure-Property Study, Inorg. Chem., 52, 6179-6186, 2013.
  • Luo, K., Johnson, R.D., Tran, T.T., Halasyamani, P.S., Radaelli, P.G., and Hayward, M.A., Ba2YFeO5.5 - A Ferromagnetic Pyroelectric Phase Prepared by Topochemical Oxidation, Chem. Mater., 25, 1800-1808, 2013.
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