Abstract
High resolution Mössbauer effect (ME) of the 6.2 keV γ rays of 181Ta has been observed in a lithiated single crystal of 1T-LiTaS2. The isomer shift of 105.2 mm/s is 35 mm/s larger than that of 2H-TaS2 and comparable to that of 2H-LiTaS2. The ME in 1T-TaS2 is not observable because of the presence of a nearly commensurate charge density wave (CDW). The observation of the ME in 1T-LiTaS2 shows that the CDW is suppressed and also reflects a change in the electronic configuration from Ta4+ (5d1) toward Ta3+ (5d2). A value of 45 mm/s per e− has been derived for the IS change due to charge transfer from Li to Ta.
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