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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Nested Fermi surfaces and correlated electronic phases in hole-doped semiconductor quantum wells.
TL;DR: In this paper, the authors demonstrate the existence of novel interaction effects in hole-doped semiconductor quantum wells which are connected to dramatic changes in the Fermi surface geometry occurring upon variation of the doping.
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Van Hove tuning of AV3Sb5 kagome metals under pressure and strain
Armando Consiglio,Tilman Schwemmer,Xianxin Wu,Werner Hanke,Titus Neupert,Ronny Thomale,Giorgio Sangiovanni,Domenico Di Sante +7 more
TL;DR: In this article, structural and electronic properties of the kagome metals AV3Sb5 (A = Cs, K, Rb) under isotropic and anisotropic pressure were investigated.
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Modulations in Superconductors: Probes of Underlying Physics
Ye Zhong Guo,Dong Qiu,Mingxin Shao,Jingyan Song,Yang Wang,Minyi Xu,Chao Yang,Peng Li,Haiwen Liu,Jie Xiong +9 more
TL;DR: In this article , a comprehensive review of state-of-the-art modulation techniques in material science, such as electric double-layer transistor, piezoelectric-based strain apparatus, angle twisting, and nanofabrication, have been utilized in superconductors.
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Fermi level tuning and double-dome superconductivity in the kagome metals CsV$_3$Sb$_{5-x}$Sn$_x$
Yuzki M. Oey,Brenden R. Ortiz,Farnaz Kaboudvand,Jonathan Frassineti,Erick Garcia,Samuele Sanna,Vesna Mitrovic,Ram Seshadri,Stephen D. Wilson +8 more
TL;DR: In this paper, a phase diagram for the AV$_3$Sb$_5$ (A = K, Rb, Cs) family of kagome metals is generated, which illustrates the impact of hole-doping the system and lifting the nearest vHs across $E_F.
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Effect of hydrostatic pressure on the unconventional charge density wave and superconducting properties in two distinct phases of doped kagome superconductors <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Cs</mml:mi><mml:msub><mml:mi mathvariant="normal">V</mml:mi><mml:
Jiaxun Hou,K. Y. Chen,J. P. Sun,Y. H. Zhang,Pengfei Shan,H. Zhang,K. J. Zhu,Yoshiya Uwatoko,H. Chen,H. T. Yang,Xing-Liang Dong,Jinguang Cheng +11 more
TL;DR: In this paper , the authors performed a comprehensive high-pressure study on Ti-doped kagome superconductors and provided more insight into the intertwined competing electronic orders in the Ti-depletion.
References
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Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
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Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
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Projector augmented-wave method
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From ultrasoft pseudopotentials to the projector augmented-wave method
Georg Kresse,Daniel P. Joubert +1 more
TL;DR: In this paper, the formal relationship between US Vanderbilt-type pseudopotentials and Blochl's projector augmented wave (PAW) method is derived and the Hamilton operator, the forces, and the stress tensor are derived for this modified PAW functional.
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Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: A detailed description and comparison of algorithms for performing ab-initio quantum-mechanical calculations using pseudopotentials and a plane-wave basis set is presented in this article. But this is not a comparison of our algorithm with the one presented in this paper.
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