Superconductivity in the Z 2 kagome metal KV 3 Sb 5
Brenden R. Ortiz,P. M. Sarte,Eric Kenney,Michael Graf,Samuel M. L. Teicher,Ram Seshadri,Stephen D. Wilson +6 more
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In this paper, the authors reported the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal (KV, Rb, Cs) with magnetic susceptibility, resistivity, and heat capacity measurements.Abstract:
Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal ${\mathrm{KV}}_{3}{\mathrm{Sb}}_{5}$. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below ${T}_{c}=0.93\phantom{\rule{0.28em}{0ex}}\mathrm{K}$, and density functional theory (DFT) calculations further characterize the normal state as a ${\mathbb{Z}}_{2}$ topological metal. Our results demonstrate that the recent observation of superconductivity within the related kagome metal ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$ is likely a common feature across the $A{\mathrm{V}}_{3}{\mathrm{Sb}}_{5}$ ($A$: K, Rb, Cs) family of compounds and establishes them as a rich arena for studying the interplay between bulk superconductivity, topological surface states, and likely electronic density wave order in an exfoliable kagome lattice.read more
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Structural instability and charge modulations in the kagome superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>A</mml:mi><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Sb</mml:mi><mml:mn>5</mml:mn></m
TL;DR: In this paper , two kinds of charge density wave (CDW) and superconductivity have been observed in kagome compounds, namely, trimerized-hexamerized and dimerized phase.
Journal ArticleDOI
Pressure-tuning structural and electronic transitions in semimetal CoSb
Mingtao Li,Deju Zhang,Jia Han,Yifei Fang,Nana Li,Xuqiang Liu,Bihan Wang,Limin Yan,Fei Chen,Yan-Ling Li,Wenge Yang +10 more
TL;DR: In this article, a comprehensive study of the electrical transport, crystalline structure, and electronic band structure of the bulk cobalt mono-antimonide (CoSb) with electrical conductivity, synchrotron x-ray diffraction, and first-principles calculations is performed.
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Electrons go loopy in a family of superconductors
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Evolution of ultraflat band in the van der Waals kagome semiconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Pd</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">P</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:m
Shaohua Yan,Benchao Gong,Lin Wang,Jinzhi Wu,Qiangwei Yin,Xinyu Cao,Xiao Zhang,Xiaofeng Liu,Zhong-Yi Lu,Kai Liu,Hechang Lei +10 more
TL;DR: In this paper , the evolutions of structural parameters, optical properties, and electronic structures of a van der Waals kagome semiconductor Pd$3}$P$2}$S$8}$ with Se doping were investigated.
Journal ArticleDOI
Higher-order topological Mott insulator on the pyrochlore lattice.
TL;DR: In this paper, the first unbiased evidence for a higher-order topological Mott insulator in 3D was provided by numerically exact quantum Monte Carlo simulations, and it was shown that the topological phase transition from the third-order TMS to the usual TMS occurs when the bulk spin gap solely closes, and the difference between correlated and non-correlated topological phases is that in the former phase the gapless corner modes emerge only in spin excitations being Mott-like.
References
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