Charge density wave transition in Na2Ti2Sb2O probed by 23Na NMR
作者： GuoZhi Fan , Xu Zhang , YouGuo Shi , JianLin Luo
DOI: 10.1007/S11433-013-5347-3
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摘要: Herein we investigated the electronic properties of layered transition-metal oxides Na2Ti2Sb2O by 23Na nuclear magnetic resonance (NMR) measurement. The resistivity, susceptibility and specific heat measurements show a phase transition at approximately 114 K (TA). No splitting or broadening in central line NMR spectra is observed below above temperature indicating no internal field being detected. spin-lattice relaxation rate divided T (1/T1T) shows sharp drop about 110 which suggests gap opening behavior. Below zone, 1/T1T Fermi liquid behavior but with much smaller value loss large part density states (DOS) because gap. signature enhancement spin fluctuations order found decreasing temperature. These results suggest commensurate charge-density-wave (CDW) occurring.
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