Rapid oscillation and Fermi-surface reconstruction due to spin-density-wave formation in the organic conductor (TMTSF ) 2 PF 6
Rapid oscillation and Fermi-surface reconstruction due to spin-density-wave formation in the organic conductor (TMTSF ) 2 PF 6
复制标题
由于有机导体中自旋密度波的形成而导致的快速振荡和费米面重建 (TMTSF ) 2 PF 6
DOI：
10.1103/physrevb.55.12446
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发表时间：
1997
影响因子：
3.7
通讯作者：
H. Anzai
中科院分区：
文献类型：
--
作者：
S. Uji;J. Brooks;M. Chaparala;S. Takasaki;J. Yamada;H. Anzai
在较宽的磁场和温度范围内测量了准一维有机导体(TMTSF2)的电阻和磁矩，以研究快速振荡(RO)和自旋密度波(SDW)的形成之间的关系.在高于15T的电阻中发现了频率为220T的RO，在SDW相中的ab面霍尔电阻中发现了频率为220T的RO。RO幅度在3K附近有一个尖锐的峰值，这与归一化磁阻的最大值有关。随着温度的降低，磁矩在SDW转变温度(11.5K)处出现跳跃，然后在3K($\mathm{T}}_{\mathm{max}}$)附近出现一个较宽的极大值，表明存在亚相变。随着磁场的增加，${\mathm{T}}_{\mathm{max}}$略微向高温方向移动。在SDW形成的费米面重构的基础上，讨论了RO的可能机制。
Resistance and magnetic torque for the quasi-one-dimensional organic conductor (TMTSF${)}_{2}$${\mathrm{PF}}_{6}$ have been measured over a wide magnetic field and temperature ranges to investigate the correlation between the rapid oscillation (RO) and the spin-density-wave (SDW) formation. The RO with the frequency of 220 T is found in the resistance above 15 T for all the current directions and in the ab-plane Hall resistance in the SDW phase. The RO amplitude has a sharp peak around 3 K, which is associated with a maximum of the normalized magnetoresistance. The magnetic torque shows a jump at the SDW transition tempera- ture (\ensuremath{\sim}11.5 K) with decreasing temperature, and then a broad maximum around 3 K (${\mathrm{T}}_{\mathrm{max}}$) suggesting a subphase transition. ${\mathrm{T}}_{\mathrm{max}}$ slightly shifts to a high temperature with increasing magnetic field. A possible mechanism of the RO is discussed on the basis of the Fermi surface reconstruction due to the SDW formation.