Abstract:A pressure-induced
structural phase transition and its intimate
link with the superconducting transition was studied for the first
time in TiSe2 up to 40 GPa at room temperature using X-ray
diffraction, transport measurement, and first-principles calculations.
We demonstrate the occurrence of a first-order structural phase transition
at 4 GPa from the standard trigonal structure (S.G.P3̅m1) to another trigonal structure (S-G-P3̅c1). Additionally, at 16 GPa,
the P3̅c1 phase spontaneously
transforms into a monoc… Show more
“…65 This sign inversion of the thermopower occurred in the pressure range in which earlier studies observed a transition to a superconducting state at low temperatures. 7,66 At B4-4.5 GPa, the thermopower curves inverted their slopes (the inset in Fig. 5).…”
A possibility of efficient controlling the optoelectronic properties of quasi-two-dimensional transition metal chalcogenides could greatly expand their innovative applications. Titanium diselenide (TiSe2) is a scientifically and industrially important representative of...
“…65 This sign inversion of the thermopower occurred in the pressure range in which earlier studies observed a transition to a superconducting state at low temperatures. 7,66 At B4-4.5 GPa, the thermopower curves inverted their slopes (the inset in Fig. 5).…”
A possibility of efficient controlling the optoelectronic properties of quasi-two-dimensional transition metal chalcogenides could greatly expand their innovative applications. Titanium diselenide (TiSe2) is a scientifically and industrially important representative of...
“…The pressure dependence of the electrical resistance of Sb 2 S 3 was determined by using the standard four-electrode method in a DAC. 49 The gasket was covered with an insulating layer of fine cubic boron nitride (cBN) powder, and thin platinum wires were used as electrodes. No PTM was loaded to avoid additional errors in the electrical measurements.…”
Despite the extensive and systematic studies of pressure-induced phase transitions in sesqui-chalcogenides, several puzzles still remain to be solved. Here, the complicated phase transitions, amorphization, and alloying behaviors of the...
“…The pressure dependence of the electrical resistance of Bi 2 Te 2 Se and Bi 2 Se 2 Te was determined using the standard four-electrode method in a DAC. 23 The gasket was covered with an insulating layer of fine cubic boron nitride ( c BN) powder, and thin platinum wires were used as electrodes. No PTM was loaded to avoid additional errors in the electrical measurements.…”
Over the past decade, external pressure has been found to play an important role in modulating the structures and properties of sesqui-chalcogenides, but several key puzzles still remain to be...
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