Structural Phase Transition of Cd-based Approximant Crystals
نویسندگان
چکیده
منابع مشابه
Order-disorder transition in a Cd-Ca quasicrystal approximant
Recent experiments discovered an order-disorder transition occuring at very low temperatures in large unit cell approximants of the stable Cd-based binary alloy quasicrystals. The transition is related to correlations among orientational degrees of freedom whose separations are 12 Å. The orientational degrees of freedom represent a type of phason disorder within the unit cells of these large ap...
متن کاملOrder-disorder transition in the Cd-Ca cubic approximant
Recent experiments discovered an order-disorder transition occuring at low temperatures in large unit 1/1 cell cubic approximants of the stable Cd-based binary alloy quasicrystals. The transition is related to correlations among orientational degrees of freedom whose separations are around 12 Å. We analyze the interactions between the degrees of freedom using ab-initio calculations for Cd-Ca al...
متن کاملInvestigation into the temperature dependence of isotropic- nematic phase transition of Gay- Berne liquid crystals
Density functional approach was used to study the isotropic- nematic (I-N) transition and calculate the values of freezing parameters of the Gay- Berne liquid crystal model. New direct and pair correlation functions of a molecular fluid with Gay- Berne pair potential were used. These new functions were used in density functional theory as input to calculate the isotropic- nematic transition den...
متن کاملExploring structural phase transitions of ion crystals
Phase transitions have been a research focus in many-body physics over past decades. Cold ions, under strong Coulomb repulsion, provide a repealing paradigm of exploring phase transitions in stable confinement by electromagnetic field. We demonstrate various conformations of up to sixteen laser-cooled (40)Ca(+) ion crystals in a home-built surface-electrode trap, where besides the usually menti...
متن کاملTopological defect transformation and structural transition of two-dimensional colloidal crystals across the nematic to smectic-A phase transition.
We observe that topological defects in nematic colloids are strongly influenced by the elasticity and onset of smectic layering across the nematic (N) to smectic-A (SmA) phase transition. When approaching the SmA phase from above, the nematic hyperbolic hedgehog defect that accompanies a spherical colloidal inclusion is transformed into a focal conic line in the SmA phase. This phase transforma...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nihon Kessho Gakkaishi
سال: 2007
ISSN: 0369-4585,1884-5576
DOI: 10.5940/jcrsj.49.68