Journal ArticleDOI
Site Specific X-ray Anomalous Dispersion of the Geometrically Frustrated Kagomé Magnet, Herbertsmithite, ZnCu3(OH)6Cl2
Danna E. Freedman,Tianheng Han,A. Prodi,Peter Müller,Qing Zhen Huang,Yu-Sheng Chen,Samuel M. Webb,Young S. Lee,Tyrel M. McQueen,Daniel G. Nocera +9 more
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TLDR
The lack of Zn mixing onto the kagomé lattice sites lends support to the idea that the electronic ground state in ZnCu(3)(OH)(6)Cl(2) and its relatives is nontrivial.Abstract:
Structural characterization, exploiting X-ray scattering differences at elemental absorption edges, is developed to quantitatively determine crystallographic site-specific metal disorder. We apply this technique to the problem of Zn−Cu chemical disorder in ZnCu3(OH)6Cl2. This geometrically frustrated kagome antiferromagnet is one of the best candidates for a spin-liquid ground state, but chemical disorder has been suggested as a mundane explanation for its magnetic properties. Using anomalous scattering at the Zn and Cu edges, we determine that there is no Zn occupation of the intralayer Cu sites within the kagome layer; however there is Cu present on the Zn intersite, leading to a structural formula of (Zn0.85Cu0.15)Cu3(OH)6Cl2. The lack of Zn mixing onto the kagome lattice sites lends support to the idea that the electronic ground state in ZnCu3(OH)6Cl2 and its relatives is nontrivial.read more
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Fractionalized excitations in the spin-liquid state of a kagome-lattice antiferromagnet
Tianheng Han,Joel S. Helton,Shaoyan Chu,Daniel G. Nocera,Jose A. Rodriguez-Rivera,Jose A. Rodriguez-Rivera,Collin Broholm,Collin Broholm,Young S. Lee +8 more
TL;DR: At low temperatures, neutron scattering measurements on single-crystal samples of the spin-1/2 kagome-lattice antiferromagnet ZnCu3(OD)6Cl2 (also called herbertsmithite), which provide striking evidence for this characteristic feature of spin liquids, find that the spin excitations form a continuum, in contrast to the conventional spin waves expected in orderedAntiferromagnets.
Journal ArticleDOI
Cs V 3 Sb 5 : A Z 2 Topological Kagome Metal with a Superconducting Ground State
Brenden R. Ortiz,Samuel M. L. Teicher,Yong Hu,Julia L. Zuo,P. M. Sarte,Emily C. Schueller,A. M. Milinda Abeykoon,M. J. Krogstad,Stephan Rosenkranz,Raymond Osborn,Ram Seshadri,Leon Balents,Junfeng He,Stephen D. Wilson +13 more
TL;DR: The electronic properties of CsV_{3}Sb_{5} are presented, demonstrating bulk superconductivity in single crystals with a T_{c}=2.5 K, and the implications for the formation of unconventional super conductivity in this material are discussed.
Journal ArticleDOI
New kagome prototype materials: Discovery of KV3Sb5,RbV3Sb5, and CsV3Sb5
Brenden R. Ortiz,Brenden R. Ortiz,Lídia C. Gomes,Lídia C. Gomes,Jennifer R. Morey,Michał J. Winiarski,Michał J. Winiarski,Mitchell M. Bordelon,John S. Mangum,Iain W. H. Oswald,Jose A. Rodriguez-Rivera,Jose A. Rodriguez-Rivera,James R. Neilson,Stephen D. Wilson,Elif Ertekin,Elif Ertekin,Tyrel M. McQueen,Eric S. Toberer +17 more
TL;DR: In this paper, a new kagome prototype structure is presented, which is based on vanadium, with the Fermi level in close proximity to several Dirac points.
Journal ArticleDOI
Evidence for a gapped spin-liquid ground state in a kagome Heisenberg antiferromagnet
TL;DR: O oxygen-17 single-crystal nuclear magnetic resonance measurements of the spin-1/2 kagome lattice in herbertsmithite suggest that herberTSmithite is indeed a QSL, and imply that the k Kagome Heisenberg antiferromagnet has a spin-liquid ground state with a finite gap.
Journal ArticleDOI
Gapless Spin-Liquid Ground State in the S = 1 / 2 Kagome Antiferromagnet
Hai-Jun Liao,Zhi-Yuan Xie,Zhi-Yuan Xie,Jing Chen,Zhi-Yuan Liu,Hai-Dong Xie,Rui-Zhen Huang,Bruce Normand,Bruce Normand,Tao Xiang +9 more
TL;DR: This work applies the formalism of tensor-network states, specifically the method of projected entangled simplex states, which combines infinite system size with a correct accounting for multipartite entanglement to demonstrate the ground state of the nearest-neighbor Heisenberg model is a gapless spin liquid.
References
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X-ray scattering factors computed from numerical Hartree–Fock wave functions
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TL;DR: In this paper, the Hartree-Fock wave function was used to compute X-ray scattering factors for neutral atoms from He to Lw and for most of the chemically significant ions through Lu3+ through Lu 3+.