Author/Authors :
Dawei Shen، نويسنده , , Lexian Yang، نويسنده , , Yan Zhang، نويسنده , , Jialin Shen، نويسنده , , Lei Fang، نويسنده , , Jing Yan، نويسنده , , Dewei Ma، نويسنده , , Haihu Wen، نويسنده , , Donglai Feng، نويسنده ,
Abstract :
We develop a novel decomposition method to extract a clean charge-density-wave (CDW) gap of sodium doped 2H-TaS2 from its partially suppressed photoemission spectra in the CDW state. We find that about View the MathML source13 of the spectrum is fully gapped, while the other View the MathML source23 is ungapped. Our results are in contrary to a recent theoretical proposal based on the band picture that divides the system into three decoupled sublattices, with two being distorted due to the CDW formation.
