July 5, 2021

Researchers discover unusual competition between charge density wave and superconductivity

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2021-07-05 22:30:03

July 5, 2021

by Zhang Nannan, Chinese Academy of Sciences

A research team led by Prof. Chen Xianhui from University of Science and Technology of China of the Chinese Academy of Sciences (CAS) found an unusual competition between charge density wave (CDW) and superconductivity in CsV3Sb5, a layered kagome metal, which provides key experimental evidence for understanding novel CDW and superconductivity. The result was published in Nature Communications and recommended as featured article.

Traditional superconductivity and CDW are two different electronic states, which both originate from electron phonon coupling and Fermi instability. In the conventional coexistence image of CDW and superconductor, after entering the CDW state, the energy gap is opened due to the nesting of Fermi surface, resulting in the loss of density of states, showing the behavior of CDW competing with superconductors.

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