ZrTe3中电荷密度波的无序猝灭
Disorder quenching of the Charge Density Wave in ZrTe3
摘要：
当Te被Se等电子取代时，ZrTe 3中的电荷密度波（CDW）被猝灭。使用角分辨光电子能谱，我们观察到Se取代后电子能带色散和费米表面的微妙变化。散射率大大增加，特别是对于大的三维费米面片。准一维能带不受取代的影响，并且在低温下仍然显示出能隙，该能隙从室温开始打开。详细的温度依赖性表明，长程序是不存在的电子状态中的周期性晶格畸变。因此，超导性和CDW之间的竞争与CDW的长程序的抑制有关。
英文摘要：
The charge density wave (CDW) in ZrTe3 is quenched in samples with small amount of Te iso-electronically substituted by Se. Using angle-resolved photoemission spectroscopy we observe subtle changes in the electronic band dispersions and Fermi surfaces on Se substitution. The scattering rates are substantially increased, in particular for the large three-dimensional Fermi surface sheet. The quasi-one-dimensional band is unaffected by the substitution and still shows a gap at low temperature, which starts to open from room temperature. The detailed temperature dependence reveals that the long-range order is absent in the electronic states as in the periodic lattice distortion. The competition between superconductivity and CDW is thus linked to the suppression of long-range order of the CDW.
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