Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite

Wulferding, Dirk; Lemmens, P.; Scheib, P.; Röder, J.; Mendels, P.; Chu, Shaoyan; Han, Tianheng; Lee, Young S.

doi:10.1103/physrevb.82.144412

Cited by 105 publications

(122 citation statements)

References 35 publications

(40 reference statements)

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“…It should be noted that this continuum of antiferromagnetic fluctuations persists down to the lowest accessible temperatures, which is consistent with the temperature dependence of the Fano resonance. 41 Remarkably, the intensity of this mode is decreasing with decreasing x until it is no longer observable for x = 0.5. The diminishing intensity of the Fano resonance of the room-temperature spin dynamics could be related to the change in the magnetic ground state as the 3D connectivity of the lattice is increased with lower x, from spin liquid to cluster glass, as observed using μSR.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Extension of the zinc paratacamite phase diagram: Probing the effect of spin vacancies in anS=12kagome antiferromagnet

et al. 2012

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Section: Raman Spectroscopymentioning

confidence: 99%

Extension of the zinc paratacamite phase diagram: Probing the effect of spin vacancies in anS=12kagome antiferromagnet

et al. 2012

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“…Although one might expect many similarities to the cuprates, the fact that these materials are hydroxychlorides instead of oxides means there will be many differences as well. So far, Raman has indicated a spin background somewhat reminiscent of cuprates (Wulferding et al, 2010), and the in-plane THz conductivity sees field-independent power-law behavior (Pilon et al, 2013) as expected for a gapless (or near gapless) spin liquid (Potter et al, 2013). Still, we have a long way to go before we have as thorough an understanding for herbertsmithite as we do for stoichiometric cuprates.…”

Section: The Futurementioning

confidence: 99%

Colloquium : Herbertsmithite and the search for the quantum spin liquid

2016

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Quantum spin liquids form a novel class of matter where, despite the existence of strong exchange interactions, spins do not order down to the lowest measured temperature. Typically, these occur in lattices that act to frustrate the appearance of magnetism. In two dimensions, the classic example is the kagome lattice composed of corner sharing triangles. There are a variety of minerals whose transition metal ions form such a lattice. Hence, a number of them have been studied, and were then subsequently synthesized in order to obtain more pristine samples. Of particular note was the report in 2005 by Dan Nocera's group of the synthesis of herbertsmithite, composed of a lattice of copper ions sitting on a kagome lattice, which indeed does not order down to the lowest measured temperature despite the existence of a large exchange interaction of 17 meV. Over the past decade, this material has been extensively studied, yielding a number of intriguing surprises that have in turn motivated a resurgence of interest in the theoretical study of the spin 1 2 Heisenberg model on a kagome lattice. In this colloquium article, I will review these developments, and then discuss potential future directions, both experimental and theoretical, as well as the challenge of doping these materials with the hope that this could lead to the discovery of novel topological and superconducting phases.

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“…The kagomé antiferromagnets herbertsmithite and kapellasite have recently emerged as prominent examples [18][19][20][21][22][23][24] . The absence of magnetic order is evidenced by many different techniques including muon spin rotation and susceptibility measurements [18][19][20][21][22][23][24] , and neutron scattering measurements of herbertsmithite show a purely continuum spectrum, interpreted as a signature of fractional "spinon" excitations 23 . Further instances of QSLs have been found in organic Mott insulators with a triangular lattice structure [25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

Global phase diagram of competing ordered and quantum spin-liquid phases on the kagome lattice

et al. 2015

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We study the quantum phase diagram of the spin-1/2 Heisenberg model on the kagomé lattice with first-, second-, and third-neighbor interactions J1, J2, and J3 by means of density matrix renormalization group. For small J2 and J3, this model sustains a time-reversal invariant quantum spin liquid phase. With increasing J2 and J3, we find in addition a q = (0, 0) Néel phase, a chiral spin liquid phase, an apparent valence-bond crystal phase, and a complex non-coplanar magnetically ordered state with spins forming the vertices of a cuboctahedron known as a cuboc1 phase. Both the chiral spin liquid and cuboc1 phase break time reversal symmetry in the sense of spontaneous scalar spin chirality. We show that the chiralities in the chiral spin liquid and cuboc1 are distinct, and that these two states are separated by a strong first order phase transition. The transitions from the chiral spin liquid to both the q = (0, 0) phase and to time-reversal symmetric spin liquid, however, are consistent with continuous quantum phase transitions.

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Interplay of thermal and quantum spin fluctuations in the kagome lattice compound herbertsmithite

Cited by 105 publications

References 35 publications

Extension of the zinc paratacamite phase diagram: Probing the effect of spin vacancies in anS=12kagome antiferromagnet

Extension of the zinc paratacamite phase diagram: Probing the effect of spin vacancies in anS=12kagome antiferromagnet

Colloquium : Herbertsmithite and the search for the quantum spin liquid

Global phase diagram of competing ordered and quantum spin-liquid phases on the kagome lattice

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