Physics: Recent submissions

  • Hydration of bentonite clay by X-ray and neutron scattering 
    Desa, J.A.E. (American Institute of Physics (AIP) Conf. Proc. , 1447. 2012; 197-198.)
    Bentonite clay when hydrated increases its volume several fold to form a pliable mass. X-ray diffraction showed that as hydration increases, the crystalline peaks due to kaolinite, calcite and quartz are gradually replaced ...
  • Characterization and magnetic properties of nanoparticle Ni(1-x)Zn(x)Fe(2)O(4) Ferrites prepared using Microwave assisted combustion method 
    Kothawale, M.M.; Tangsali, R.B.; Naik, G.K.; Budkuley, J.S. (Journal of Superconductivity and Novel Magnetism. 25(6); 2012; 1907-1911.)
    Nanoparticle Ni(1-x)Zn(x)Fe(2)O(4) (x = 0.35, 0.45) samples were prepared successfully via microwave assisted combustion method. Synthesis of nanosize materials at a low temperature using a domestic microwave oven is the ...
  • Influence of local structure on magnetic properties of layered cobaltites PrBaCo(2)O(5+delta), delta greater than 0.5 
    Ganorkar, S.; Priolkar, K.R.; Sarode, P.R.; Banerjee, A.; Rawat, R.; Emura, S. (Journal of Physics-Condensed Matter. 24(47); 2012; Article ID: 476003.)
    The effect of local structure on the magnetic and transport properties of the layered perovskites has been investigated. The samples PrBaCo(2)O(5+delta), (delta = 0.80 and 0.67) crystallize in the same 112 type tetragonal ...
  • Nano-porous structure of a porous ceramics from rice husk 
    Raut-Dessai, R.; Desa, J.A.E.; Sen, D.; Mazumder, S. (Transactions of The Indian Ceramic Society. 71(4); 2012; 243-246.)
    A porous ceramics is obtained using rice husk as the source of silica. The modification of mesoscopic structure under different sintering conditions has been investigated using neutron scattering techniques and scanning ...
  • The inhomogeneous extended Bose-Hubbard model: A mean-field theory 
    Kurdestany, J.M.; Pai, R.V.; Pandit, Rahul (Annalen Der Physik. 524(41702); 2012; 234-244.)
    We develop an inhomogeneous mean-field theory for the extended Bose-Hubbard model with a quadratic, confining potential. In the absence of this potential, our mean-field theory yields the phase diagram of the homogeneous ...
  • Bose-Hubbard model in a strong effective magnetic field: Emergence of a chiral Mott insulator ground state 
    Dhar, A.; Maji, M.; Mishra, T.; Pai, R.V.; Mukerjee, S.; Paramekanti, A. (Physical Review A. 85(4); 2012; Article ID: 041602(R).)
    Motivated by experiments on Josephson junction arrays, and cold atoms in an optical lattice in a synthetic magnetic field, we study the "fully frustrated" Bose-Hubbard model with half a magnetic flux quantum per plaquette. ...
  • Bose-Hubbard models in confining potentials: Inhomogeneous mean-field theory 
    Pai, R.V.; Kurdestany, J.M.; Sheshadri, K.; Pandit, Rahul (Physical Review B. 85(21); 2012; Article ID: 214524.)
    An extensive study of Mott insulator (MI) and superfluid (SF) shells in Bose-Hubbard (BH) models for bosons in optical lattices with harmonic traps is presented. For this we apply the inhomogeneous mean-field theory ...
  • Ground-state properties of linear-exchange quantum spin models 
    Danu, B.; BrijeshKumar; Pai, R.V. (EPL - Europhysics Letters. 100(2); 2012; Article ID: 27003.)
    We study a class of one-dimensional antiferromagnetic quantum spin-1/2 models using DMRG. The exchange interaction in these models decreases linearly with the separation between the spins, J(ij) = R - vertical bar i-j ...
  • Role of crystal defects in red long-lasting phosphorescence of CaMgSi(2)O(6):Mn diopsides 
    Bessiere, A.; Lecointre, A.; Priolkar, K.R.; Gourier, D. (Journal of Materials Chemistry. 22(36); 2012; 19039-19046.)
    CaMgSi(2)O(6):Mn diopsides are used for in vivo long-lasting phosphorescence (LLP) imaging. Trapping defects involved in the LLP mechanism were investigated. On annealing Mn-doped diopsides at 1100 degrees C in an Ar-H-2 ...
  • Optical absorption and photoluminescent studies of cerium-doped cobalt tungstate nanomaterials 
    Naik, S.J.; UmaSubramanian; Tangsali, R.B.; Salker, A.V. (Journal of Physics D-Applied Physics. 44(11); 2011; Article ID: 115404.)
    This paper deals with optical absorption and photoluminescence properties of nanorange (22-65 nm) luminescent materials Co(1-x)Ce(x)WO(4) (where x = 0.01, 0.015, 0.02, 0.025 and 0.03) sintered in air at various temperatures. ...

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