Structural and electrical transport properties of charge density wave material LaAgSb2 under high pressure

Structural and electrical transport properties of charge density wave material LaAgSb2 under high pressure
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高压下电荷密度波材料LaAgSb2的结构和电传输特性

DOI:
10.1088/1674-1056/abf643
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发表时间:
2021-07
期刊:
影响因子:
1.7
通讯作者:
Yang Zhaorong
Yang Zhaorong
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhang Bowen;An Chao;Chen Xuliang;Zhou Ying;Zhou Yonghui;Yuan Yifang;Chen Chunhua;Zhang Lili;Yang Xiaoping;Yang Zhaorong

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层状锑化镧银化物LaAgSb 2在常压下具有电荷密度波(CDW)有序和类Dirac锥能带结构。本文系统地研究了LaAgSb_2单晶的结构和电子性质随压力的演化。我们发现,CDW秩序是不稳定的压缩下,证明了磁阻的逐渐抑制。在P-C = 22 GPa时,同步辐射X射线衍射和拉曼散射测量结果表明在室温下结构发生了变化.同时,在5 K时,观察到霍尔系数的符号变化.我们的研究结果表明,CDW秩序在加压LaAgSb 2单晶的可调谐性,这可能有助于其在下一代器件的潜在应用。
Layered lanthanum silver antimonide LaAgSb2 exhibits both charge density wave (CDW) order and Dirac-cone-like band structure at ambient pressure. Here, we systematically investigate the pressure evolution of structural and electronic properties of LaAgSb2 single crystal. We show that the CDW order is destabilized under compression, as evidenced by the gradual suppression of magnetoresistance. At P C ∼ 22 GPa, synchrotron x-ray diffraction and Raman scattering measurements reveal a structural modification at room-temperature. Meanwhile, the sign change of the Hall coefficient is observed at 5 K. Our results demonstrate the tunability of CDW order in the pressurized LaAgSb2 single crystal, which can be helpful for its potential applications in the next-generation devices.
DOI: 10.1016/s0304-8853(99)00472-2
发表时间: 1999-10
影响因子: 2.7
作者:
K.D Myers;S. Bud’ko;I.R Fisher;Z. Islam;H. Kleinke;A.H Lacerda;P. Canfield
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