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arXiv 1409.4483cond-mat.str-el
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三维顺磁系统GaTa4Se8中绝缘体-金属的一阶Mott相变

First-Order Insulator-to-Metal Mott Transition in the Paramagnetic 3D System GaTa4Se8

A. Camjayi, C. Acha, R. Weht, M. G. Rodríguez, B. Corraze, E. Janod, L. Cario, M. J. Rozenberg

摘要:

在没有任何对称性制动的情况下,莫特转变的性质仍然是一个有争议的问题。我们研究了相关驱动的绝缘体到金属的转变,在原型的3D莫特系统GaTa 4Se 8,作为温度和施加的压力的函数。我们报告新的实验单晶,这表明,过渡是一阶的,并遵循从两个国家的共存,一个绝缘和一个金属,我们用一个小的偏置电流切换。我们提供了支持,我们的研究结果的对比实验数据与计算相结合的局域密度近似与动态平均场论,这是非常好的协议。

英文摘要:

The nature of the Mott transition in the absence of any symmetry braking remains a matter of debate. We study the correlation-driven insulator-to-metal transition in the prototypical 3D Mott system GaTa4Se8, as a function of temperature and applied pressure. We report novel experiments on single crystals, which demonstrate that the transition is of first order and follows from the coexistence of two states, one insulating and one metallic, that we toggle with a small bias current. We provide support for our findings by contrasting the experimental data with calculations that combine local density approximation with dynamical mean-field theory, which are in very good agreement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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