scholarly journals Characterization of informational completeness for covariant phase space observables

2012 ◽  
Vol 53 (10) ◽  
pp. 102103 ◽  
Author(s):  
J. Kiukas ◽  
P. Lahti ◽  
J. Schultz ◽  
R. F. Werner
2014 ◽  
Vol 52 ◽  
pp. 75-79
Author(s):  
A. Cianchi ◽  
D. Alesini ◽  
M.P. Anania ◽  
M. Bellaveglia ◽  
M. Castellano ◽  
...  

Ultrasonics ◽  
2018 ◽  
Vol 84 ◽  
pp. 446-458 ◽  
Author(s):  
Ehsan Dehghan-Niri ◽  
Helem Al-Beer

2004 ◽  
Vol 37 (18) ◽  
pp. 5057-5066 ◽  
Author(s):  
C Carmeli ◽  
G Cassinelli ◽  
E DeVito ◽  
A Toigo ◽  
B Vacchini

2002 ◽  
Vol 17 (4) ◽  
pp. 301-319 ◽  
Author(s):  
G. O. Jones ◽  
J. Kreisel ◽  
P. A. Thomas

Rietveld neutron powder profile analysis of the (Na1−xKx)0.5Bi0.5TiO3 (NKBT) series (x=0, 0.2, 0.4, 0.5, 0.6, 0.8, 1.0) is reported over the temperature range 293–993 K. A detailed characterization of the structures and phase transitions occurring across this series as a function of temperature has been made. Room-temperature refinements have revealed a rhombohedral phase, space group R3c for x=0, 0.2, and 0.4, which exhibits an antiphase, a−a−a− oxygen tilt system with parallel cation displacements along [111]p. An intermediate zero-tilt rhombohedral phase, space group R3m possessing cation displacements along [111]p, has been established for x=0.5 and 0.6. At the potassium-rich end of the series at x=0.8 and 1.0, a tetragonal phase, space group P4mm is observed possessing cation displacements along [001]. At the sodium-rich end of the series for x=0.2, the unusual tetragonal structure with space group P4bm is seen for Na0.5Bi0.5TiO3 which possesses a combination of in-phase a0a0c+ tilts and antiparallel cation displacements along the polar axis. Temperature-induced phase transitions are reported and structural modifications are discussed.


2010 ◽  
Vol 82 (4) ◽  
Author(s):  
Vinitha Balachandran ◽  
Giuliano Benenti ◽  
Giulio Casati ◽  
Jiangbin Gong

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