Zobrazeno 1 - 10
of 43
pro vyhledávání: '"N. Chandrabhas"'
Publikováno v:
Physical Review B. 51:8892-8896
Raman experiments have been carried out on single crystals of ${\mathrm{BaTiO}}_{3}$ as a function of pressure up to 3.5 GPa across the ferroelectric (tetragonal) to paraelectric (cubic) phase transition. The unusual features in the Raman spectra ass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b73d31e89d3d03e39cb444c62f3b4fa
https://doi.org/10.1103/physrevb.51.8892
https://doi.org/10.1103/physrevb.51.8892
Autor:
A. K. Sood, N. Chandrabhas
Publikováno v:
Physical Review B. 51:8795-8800
The pressure dependence of the Raman spectra of RbIO4 has been investigated up to 27.3 GPa at room temperature using the diamond-anvil cell. The changes in the Raman spectra show clearly two pressure-induced phase transitions at 5.3 GPa from scheelit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36891f3a97f6bb124d0e59c9718b873e
https://doi.org/10.1103/physrevb.51.8795
https://doi.org/10.1103/physrevb.51.8795
Autor:
A. Bharathi, C. S. Sundar, Y. Hariharan, D. V. S. Muthu, N. Chandrabhas, A. K. Sood, C. N. R. Rao
Publikováno v:
Physical Review Letters. 73:3411-3414
We have studied single crystals of C70 by Raman scattering and photoluminescence in the pressure range from 0 to 3 1.1 GPa. The Raman spectrum at 3 1.1 GPa shows only a broadband similar to that of the amorphous carbon without any trace of the Raman
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f3ceeca0b3840ab008ca5c8ce798670
https://doi.org/10.1103/physrevlett.73.3411
https://doi.org/10.1103/physrevlett.73.3411
Publikováno v:
Philosophical Magazine B. 70:347-358
Photoluminescence and Raman scattering experiments have been carried out on single crystals of C70 up to 31 GPa to investigate the effect of pressure on the optical band gap, vibrational modes and stability of the molecule. The photoluminescence band
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4800ae5c280d5b0342c004957a26050
https://doi.org/10.1080/01418639408240211
https://doi.org/10.1080/01418639408240211
Autor:
D. Sundararaman, Y. Hariharan, S. Raju, T.S. Radhakrishnan, V. S. Sastry, V. S. Raghunathan, A. Bharathi, N. Chandrabhas, G.V.N. Rao, C. S. Sundar, A. K. Sood
Publikováno v:
Pramana. 42:375-385
The structure of multilayered carbon tubules has been investigated by electron microscopy and X-ray diffraction. The structure of tubules is characterized by disorder in the stacking of cylindrical graphene sheets. Raman scattering measurements have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4c57c39a2a2157359ea80ec8acc3149
https://doi.org/10.1007/bf02847554
https://doi.org/10.1007/bf02847554
Publikováno v:
Journal of Physics and Chemistry of Solids. 55:107-112
A Raman study of $LiCsSO_4$ as a function of pressure up to 26 GPa has revealed three distinct first order phase transitions at 2.0, 4.0 and 7.2 GPa. Above 10 GPa the external modes merge with the background and the internal moda broaden, suggesting
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc46022e95e72a9b08a73c8ad961a282
https://doi.org/10.1016/0022-3697(94)90190-2
https://doi.org/10.1016/0022-3697(94)90190-2
Publikováno v:
Physical Review B. 47:10963-10966
Raman investigations of C70 films in the 14-370-K range show significant changes across the orientational phase transitions around 270 and 330 K. Seven of the Raman modes of C70 soften smoothly across the transitions, the magnitude of the decrease in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fc0a1d54e621eae9ffb2567b3d3155b
https://doi.org/10.1103/physrevb.47.10963
https://doi.org/10.1103/physrevb.47.10963
Publikováno v:
Journal of Raman Spectroscopy. 23:611-614
The octachloro cyclic phosphazene tetramer P 4 N 4 Cl 8 was studied by high-pressure Raman spectroscopy up to 10 GPa in the K form (boat-shaped molecule) and in the T form (chair-shaped molecule). There are pressure-induced phase transitions in the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3572b0cf7ec9317d4720cd489ec7bee
https://doi.org/10.1002/jrs.1250231106
https://doi.org/10.1002/jrs.1250231106
Autor:
Thalappil Pradeep, N. Chandrabhas, D. Victor S. Muthu, A. K. Sood, A. Jayaraman, H. R. Krishnamurthy, C. N. R. Rao, Narendra Kumar
Publikováno v:
Solid State Communications. 81:89-92
We report the first observation of a large pressure-induced red-shift of the photoluminescence band in single crystals of C 60 and the associated colour change of the sample from red to black at 3.2 GPa. Interpreting the red shift of the luminescence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cff6de03a69616e79ad419f8cc065b9
https://doi.org/10.1016/0038-1098(92)90577-v
https://doi.org/10.1016/0038-1098(92)90577-v
Autor:
N Y Vasanthacharya, G V Kulkarni, G Rango Rao, G.N. Subbanna, A K Sood, A. R. Raju, C. N. R. Rao, N Chandrabhas, Rajamani Nagarajan, P Somasundaram, A M Umarji, R. Vijayaraghavan
Publikováno v:
Superconductor Science and Technology. 3:242-248
A systematic investigation of the properties of the series Bi2Ca1-xLnxSr2Cu2O8+ delta (Ln-rare earth or Y) of superconducting cuprates has been carried out by employing a variety of techniques. In these cuprates, the a and b parameters of the unit ce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2471aef11052cacdf1c0dadb155611a6
https://doi.org/10.1088/0953-2048/3/5/006
https://doi.org/10.1088/0953-2048/3/5/006