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Formation, structure, and electric property of single crystal synthesized under high pressure
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) The calculated enthalpies for and as a function of pressure. Inset is a SEM image of the typical shape of our synthesized single crystals; (b) The Temperature (T)-Pressure (P) phase diagram of Ca–B binary system. The solid curvature represents the Ca melting point under high pressure (Ref. 14).

Image of FIG. 2.
FIG. 2.

(a) The EELS taken from a crystal (Inset shows its transmission electron microscope image), in which only the and edges are observed. The SAED patterns taken along the zone axes of (b) [100], (c) , and (d) [101]. From these SAED patterns, the single crystal is determined to have a -type tetragonal structure with the lattice parameters estimated to be and .

Image of FIG. 3.
FIG. 3.

The measured and calculated (solid line) powder XRD patterns of . Below the XRD patterns is the difference between the measured and calculated profiles. The vertical bars mark all possible Bragg’s reflections.

Image of FIG. 4.
FIG. 4.

(a) The temperature-dependent resistivity of a single crystal. Inset is the temperature-dependent Hall coefficient of . These measurements were measured in a physical property measurement system (PPMS-9, QUANTUMDESIGN). (b) The band structure of is along several special points in the first Brillouin zone.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Formation, structure, and electric property of CaB4 single crystal synthesized under high pressure