The exciting story of TiSe2
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چکیده
One of the most beautiful theories of condensed matter is certainly the theory of conventional superconductivity. Called the BCS theory after the names of the creators (Bardeen, Cooper and Schrieffer), it explains the zero resistance appearing in particular materials when their temperature approaches absolute zero. In the BCS theory, electrons are bound together by an attractive interaction and form pairs which will condense into a macroscopic quantum state at low temperature. Since breaking such a pair costs energy, it is more favorable for the system to let them flow without losses, giving rise to conductivity with zero resistance.
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Superconductivity at 2.3 K in the misfit compound (PbSe)1.16(TiSe2)2
The structural misfit compound PbSe 1.16 TiSe2 2 is reported. It is a superconductor with a Tc of 2.3 K. PbSe 1.16 TiSe2 2 derives from a parent compound, TiSe2, which shows a charge-density wave transition and no superconductivity. The crystal structure, characterized by high-resolution electron microscopy and powder x-ray diffraction, consists of two layers of 1T-TiSe2 alternating with a doub...
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