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Anomalous structural phase transition properties in ReSe2 and Au-doped ReSe2
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10.1063/1.4733985
/content/aip/journal/jcp/137/2/10.1063/1.4733985
http://aip.metastore.ingenta.com/content/aip/journal/jcp/137/2/10.1063/1.4733985

Figures

Image of FIG. 1.
FIG. 1.

Representative ADXRD patterns of (a) ReSe2 and (b) Au-ReSe2 at elevated pressures, respectively. ReSe2 and Au-ReSe2 exhibited a phase transition with an onset pressure of 9.98 and 8.52 GPa marked with *, respectively.

Image of FIG. 2.
FIG. 2.

Pressure dependence of the V/V0 of (a) ReSe2 and (b) Au-ReSe2 at 300 K. The circle and square stand for ReSe2 and Au-ReSe2, respectively.

Image of FIG. 3.
FIG. 3.

The change of (a) ReSe2 and (b) Au-ReSe2 cell parameters a, b, and c with increasing pressures. The square, circle, and triangle stand for the cell parameters a, b, and c, respectively.

Image of FIG. 4.
FIG. 4.

The pressure dependence of cell angles α, β, and γ of (a) ReSe2 and (b) Au-ReSe2. The square, circle, and triangle stand for the cell angles α, β, and γ, respectively.

Image of FIG. 5.
FIG. 5.

(a) Cell parameter ratio as a function of pressure for ReSe2, the black square, red circle, and blue triangle stand for the a/a 0, b/b 0, and c/c 0, respectively. (b) Cell angle ratio as a function of pressure for ReSe2, the black square, red circle, and blue triangle stand for the α/α 0, β/β 0, and γ/γ 0, respectively. (c) The stresses force a counterclockwise rotational trend of the selenium atoms around the chain of Re4 atoms during the decrease of the c-axis distance for ReSe2.

Image of FIG. 6.
FIG. 6.

(a) Cell parameter ratio as a function of pressure for Au-ReSe2, the black square, red circle, and blue triangle stand for the a/a 0, b/b 0, and c/c 0, respectively. (b) Cell angle ratio as a function of pressure for Au-ReSe2, the black square, red circle, and blue triangle stand for the α/α 0, β/β 0, and γ/γ 0, respectively. (c) For Au-ReSe2, anomalous pressure dependence of an inversion of the rotational trend of the selenium atoms around the chain of Re4 atoms during the decrease of the c -axis distance from clockwise to counterclockwise rotational trend.

Tables

Generic image for table
Table I.

Unit-cell lattice parameters a, b, c, α, β, γ, volume V, linear compressibilities, and bulk modulus B 0 of ReSe2 at different pressures.

Generic image for table
Table II.

Unit-cell lattice parameters a, b, c, α, β, γ, volume V, linear compressibilities, and bulk modulus B 0 of Au-ReSe2 at different pressures.

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/content/aip/journal/jcp/137/2/10.1063/1.4733985
2012-07-12
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Anomalous structural phase transition properties in ReSe2 and Au-doped ReSe2
http://aip.metastore.ingenta.com/content/aip/journal/jcp/137/2/10.1063/1.4733985
10.1063/1.4733985
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