Physics: Recent submissions

Now showing items 321-330 of 420

Supersolid and solitonic phases in the one-dimensional extended Bose-Hubbard model

Mishra, T.; Pai, R.V.; Ramanan, S.; Luthra, M.S.; Das, B.P. (Physical Review A. 80(4); 2009; Article ID: 043614.)

We report our findings on the quantum phase transitions in cold bosonic atoms in a one-dimensional optical lattice using the finite-size density-matrix renormalization-group method in the framework of the extended Bose-Hubbard ...
Structural investigation of activated lattice Oxygen in Ce(1-x)Sn(x)O(2) and Ce(1-x-y)Sn(x)Pd(y)O(2-delta) by EXAFS and DFT calculation

Gupta, A.; Hegde, M.S.; Priolkar, K.R.; Waghmare, U.V.; Sarode, P.R.; Emura, S. (Chemistry of Materials. 21(24); 2009; 5836-5847.)

Substitution of Sn4+ ion in CeO(2) creates activated oxygen in Ce(0.8)Sn(0.2)O(2) leading to higher oxygen storage capacity compared to Ce(0.8)Zr(0.2)O(2). With Pd ion substitution in Ce(0.8)Sn(0.2)O(2), activation of ...
Optical properties of Pr and Nd ions in a borate glass

Desa, J.A.E.; Vaz, W.A.; DeSouza, B.L.; ManjuSingh (Glass Technology-European Journal of Glass Science and Technology Part A. 50(4); 2009; 230-232.)

A set of five borate glasses containing oxides of praseodymium and neodymium have been prepared with several relative molar ratios of Pr and Nd. FTIR measurements showed the presence of the B-O stretching mode in BO(4) ...
Phase-separated charge-density-wave phase in the two-species extended Bose-Hubbard model

Mishra, T.; Sahoo, B.K.; Pai, R.V. (Physical Review A. 78(1); 2008; Article ID 013632)

We study the quantum phase transitions in a two component Bose mixture in a one-dimensional optical lattice. The calculations have been performed in the framework of the extended Bose-Hubbard model using the finite size ...
Local structural changes in paramagnetic and charge-ordered phases of Sm(0.2)Pr(0.3)Sr(0.5)MnO(3): an EXAFS study

Priolkar, K.R.; Kulkarni, V.; Sarode, P.R.; Emura, S. (Journal of Physics-Condensed Matter. 20(33); 2008; Article ID: 335227)

Sm(0.5-x)Pr(x)Sr(0.5)MnO(3) exhibits a variety of ground states as x is varied from 0 to 0.5. At an intermediate doping of x = 0.3 a charge-ordered CE-type antiferromagnetic insulating (AFI) ground state is seen. The ...
Effect of heterovalent substitution at Mn site on the magnetic and transport properties of La(0.67)Sr(0.33)MnO(3)

Priolkar, K.R.; Rawat, R. (Journal of Magnetism and Magnetic Materials. 320(41702); 2008; 325-330.)

Magnetic and transport properties of Ti substituted La(0.67)Sr(0.33)MnO(3) are drastically affected with a change in preparation conditions. Low temperature infra-red absorption measurements reveal that this is perhaps due ...
Phase diagram of a bosonic ladder with two coupled chains

Luthra, M.S.; Mishra, T.; Pai, R.V.; Das, B.P. (Physical Review B. 78(16); 2008; Article ID: 165104)

We study a bosonic ladder with two coupled chains using the finite-size density-matrix renormalization group method. We show that in a commensurate bosonic ladder the critical on-site interaction (U(C)) for the superfluid ...
Phases and transitions in the spin-1 Bose-Hubbard model: Systematics of a mean-field theory

Pai, R.V.; Sheshadri, K.; Pandit, Rahul (Physical Review B. 77(1); 2008; Article ID: 014503)

We generalize the mean-field theory for the spinless Bose-Hubbard model to account for the different types of superfluid phases that can arise in the spin-1 case. In particular, our mean-field theory can distinguish polar ...
Effect of Ti(4+) substitution on structural, transport and magnetic properties of La(0.67)Sr(0.33)Mn(1-x)Ti(x)O(3)

Kulkarni, V.; Priolkar, K.R.; Sarode, P.R.; Rawat, R.; Banerjee, A.; Emura, S. (Journal of Physics-Condensed Matter. 20(7); 2008; Article ID: 075203)

La(0.67)Sr(0.33)Mn(1-x)Ti(x)O(3) (0 less than or equal to x less than or equal to 0.20) polycrystalline materials are prepared by employing lower annealing temperature compared to the temperatures reported for the materials ...
Local atomic arrangement and martensitic transformation in Ni(50)Mn(35)In(15): An EXAFS Study

Bhobe, P.A.; Priolkar, K.R.; Sarode, P.R. (Journal of Physics D-Applied Physics. 41; 2008; Article ID: 45004.)

Heusler alloys that undergo martensitic transformation in ferromagnetic state are of increasing scientific and technological interest. These alloys show large magnetic field induced strains upon martensitic phase change ...

Now showing items 321-330 of 420

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