LaAu $_x$ Sb $_2$中电荷密度波跃迁的压力和Au化学计量调谐
Tuning of charge density wave transitions in LaAu$_x$Sb$_2$ by pressure and Au-stoichiometry
摘要：
通过对LaAu $_x$ Sb $_2$的电输运测量，在~ 110和~ 90 K下发现了两个电荷密度波跃迁。然而，控制LaAu $_x$ Sb $_2$中的Au位置占据（对于0.9 < x < 1.0）可以将这些跃迁中的每一个抑制约80 K，而应用流体静压力可以将下跃迁完全抑制约10 kbar，并且将上跃迁完全抑制约17 kbar。电阻和磁阻的明显异常被观察到与电荷密度波跃迁被驱动到零的压力一致。
英文摘要：
Two charge density wave transition can be detected in LaAu$_x$Sb$_2$ at ~ 110 and ~ 90 K by careful electrical transport measurements. Whereas control of the Au site occupancy in LaAu$_x$Sb$_2$ (for 0.9 < x < 1.0) can suppress each of these transitions by ~ 80 K, the application of hydrostatic pressure can completely suppress the lower transition by ~ 10 kbar and the upper transition by ~ 17 kbar. Clear anomalies in the resistance as well as the magnetoresistance are observed to coincide with the pressures at which the charge density wave transitions are driven to zero.
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