ARPES and STM view of heavy-electron quantum criticality: perspectives and challenges

ARPES and STM view of heavy-electron quantum criticality: perspectives and challenges
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ARPES 和 STM 的重电子量子临界性观点:前景和挑战

DOI:
--
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发表时间:
2018-10
期刊:
arXiv:1810.13293
影响因子:
--
通讯作者:
Qimiao Si
Qimiao Si
中科院分区:
其他
文献类型:
--
作者:
Stefan Kirchner;Silke Paschen;Qiuyun Chen;Steffen Wirth;Donglai Feng;Joe D. Thompson;Qimiao Si

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角分辨光电子能谱(ARPES)和扫描隧道显微镜(STM)已成为研究关联量子物质不可缺少的工具。两者都探测单粒子激发光谱的互补方面。总之,ARPES和STM有潜力探索电子绿色函数的性质,多体理论的中心目标。在这篇文章中,我们解释了这种潜力,重点是重电子量子临界性,特别是近藤破坏的作用。我们讨论了如何使用ARPES和STM测量来探测量子临界点附近的近藤破坏效应。我们特别强调的问题是如何区分的杂交间隙的形成,这是“高能量”的物理预期在所有重电子系统的初始发病的签名,和近藤破坏,其特点是量子临界性的性质。本文综述了近年来实验测量方面的进展和可能面临的挑战,比较了几种量子临界重电子化合物的STM谱和ARPES谱,并展望了进一步的研究前景。
Angle resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM) have become indispensable tools in the study of correlated quantum matter. Both probe complementary aspects of the single-particle excitation spectrum. Taken together, ARPES and STM have the potential to explore properties of the electronic Green function, a central object of many-body theory. In this article, we explicate this potential with a focus on heavy-electron quantum criticality, especially the role of Kondo destruction. We discuss how to probe the Kondo destruction effect across the quantum critical point using ARPES and STM measurements. We place particular emphasis on the question of how to distinguish between the signatures of the initial onset of hybridization-gap formation, which is the "high-energy" physics to be expected in all heavy electron systems, and those of Kondo destruction, which characterizes the nature of quantum criticality. We survey the recent progresses and possible challenges in the experimental measurements, compare the STM and ARPES spectra for several quantum-critical heavy-electron compounds, and outline the prospects for further progresses.
DOI: 10.1073/pnas.2001778117
发表时间: 2020-09-22
影响因子: 11.1
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通讯作者: Shim, Ji Hoon
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