Energy gap of a charge density wave in NbSe3 induced by a high magnetic field above the Peierls transition temperature
Energy gap of a charge density wave in NbSe3 induced by a high magnetic field above the Peierls transition temperature
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高于 Peierls 转变温度的高磁场在 NbSe3 中引起的电荷密度波的能隙
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
P. Monceau
中科院分区：
文献类型：
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作者：
A. Orlov;Y. Latyshev;D. Vignolles;P. Monceau
利用层间隧道谱研究了磁场对NbSe_3在下Peierls跃迁温度Tp_2附近的电荷密度波（CDW）能隙的影响。已经表明，磁场增加了能隙，甚至可以在高于Tp 2 15-20 K的温度下诱导能隙。随着场强的增加，隧穿谱的差距奇异性峰值幅度先增大，在20-30 T时达到最大值，然后减小。差距峰振幅的增加归因于场诱导的CDW嵌套条件的改善，而在高场下的振幅的减小归因于其塞曼分裂引起的基态的击穿。
The effect of a magnetic field on the energy gap of the charge density wave (CDW) in NbSe3 near the temperature Tp2 of the lower Peierls transition has been investigated using interlayer tunneling spectroscopy. It has been shown that the magnetic field increases the energy gap and can even induce it at temperatures higher than Tp2 by 15–20 K. As the field strength increases, the peak amplitude of the gap singularity of the tunneling spectrum first increases, reaches its maximum at 20–30 T, and then decreases. The increase in the gap peak amplitude is attributed to the field-induced improvement of the condition of the CDW nesting, while the decrease in the amplitude in high fields, to the breakdown of the ground state caused by its Zeeman splitting.