The crystal structure of CuTeO<sub>4</sub>

Falck, L.; Lindqvist, Oliver; Mark, Wanda; Philippot, E.; Moret, J.

doi:10.1107/s0567740878005889

Cited by 23 publications

(22 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The first attempt to make Cu 3 TeO 6 was by high temperature hydrothermal synthesis [20]. CuTeO 4 has been made under similar conditions [23], though Cu 3 TeO 6 is thermodynamically more stable. The interest in CuTeO 4 is that it exhibits a square lattice net for the copper ions ( Fig.…”

Section: Figmentioning

confidence: 99%

“…It has been proposed that replacing Te 6+ by Sb 5+ could hole dope this material, potentinally leading to a superconducting phase [37]. Experimenally, only the structure is known, and beyond the original synthesis paper [23], the only reports in the literature is finding it as a secondary phase. [23].…”

Section: Figmentioning

confidence: 99%

“…Experimenally, only the structure is known, and beyond the original synthesis paper [23], the only reports in the literature is finding it as a secondary phase. [23]. View is along the b axis, with y ranging from 0.4 to 0.6.…”

Section: Figmentioning

confidence: 99%

See 2 more Smart Citations

Copper tellurium oxides – A playground for magnetism

Norman

2018

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

A variety of copper tellurium oxide minerals are known, and many of them exhibit either unusual forms of magnetism, or potentially novel spin liquid behavior. Here, I review a number of the more interesting materials with a focus on their crystalline symmetry and, if known, the nature of their magnetism. Many of these exist (so far) in mineral form only, and most have yet to have their magnetic properties studied. This means a largely unexplored space of materials awaits our exploration.In 2005, Dan Nocera's group reported the synthesis of the copper hydroxychloride mineral, herbertsmithite [1]. A number of years later, they were able to report the growth of large single crystals [2]. Since then, a number of relatives of this mineral have been discovered and characterized [3]. Despite the existence of a large Curie-Weiss temperature of order 300 K, herbertsmithite does not order down to 20 mK [4].The reason these events have significance is that these minerals could be a realization of an idea proposed by Phil Anderson back in 1973 [5] that was based on an early debate in the field of magnetism between Louis Néel and Lev Landau. Néel had proposed the existence of antiferromagnetism, where there are two sub lattices of ferromagnetic moments oppositely aligned. This state was subsequently seen by neutron scattering (which resulted in a Nobel prize for Néel, and later for the neutron scatterer, Clifford Shull). But at the time, there was great skepticism about the existence of this state. The reason is that it is not an eigenstate of the spin operator (unlike ferromagnetism). There was suspicion that the true ground state would be a singlet. We now know that the origin of the Néel state is broken symmetry [6], and that fluctuations are usually not enough to destabilize long range order. But Phil realized that if the spins sat on a non-bipartite lattice, matters could change. Imagine a triangle with Ising spins. Then if two spins are anti-aligned, the direction of the third spin is undetermined. Phil speculated that instead of Néel order, the spins instead paired up to form singlets, and this would be preferred in two dimensions (where thermal fluctuations have a tendency to suppress order) and for low spin (where quantum fluctuations are more important). This is particularly obvious for S=1/2, where a singlet bond has an energy of -3J/4 compared to -J/4 for an antiferromagnetic bond. But to avoid the energy loss from the unpaired spin, these singlets should fluctuate from bond to bond, much like Pauling's model for how double carbon bonds in benzene rings resonate from one link to the next (hence the name, resonating valence bonds).Most attention has been given to the Heisenberg model, given the more important role of fluctuations in this case. But we now know that the near neighbor Heisenberg model on a triangular lattice does order, with the spins rotating by 120 • from one sub lattice to the next [7]. This is most clear from exact diagonalization studies, where precursors of the broken symmetry state, and associa...

show abstract

Section: Figmentioning

confidence: 99%

Section: Figmentioning

confidence: 99%

See 1 more Smart Citation

Copper tellurium oxides – A playground for magnetism

Norman

2018

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

show abstract

“…Even though its crystal structure was reported almost forty years ago [3], the electronic and magnetic properties of CuTeO 4 have not been explored. This may be due to the difficulty of growing the material (Cu 3 TeO 6 tends to form instead [9]), and the fact that the crystals are disordered, probably due to stacking faults.…”

mentioning

confidence: 99%

Electronic structure of CuTeO4 and its relationship to cuprates

Botana¹,

Norman²

2017

Phys. Rev. B

View full text Add to dashboard Cite

Based on first principles calculations, the electronic structure of CuTeO4 is discussed in the context of superconducting cuprates. Despite some significant crystallographic differences, we find that CuTeO4 is similar to these cuprates, exhibiting a quasi two dimensional electronic structure that involves hybridized Cu-d and O-p states in the vicinity of the Fermi level, along with an antiferromagnetic insulating ground state. Hole doping this material by substituting Te 6+ with Sb 5+ would be of significant interest.

show abstract

“…2. Strukturausschnitte aus dem [Cu50 18]-Netzwerk von Cu5Zn4(Te06)3. a) Schnitt senkrecht zur fr-Achse bei y = 0; b) Schnitt senkrecht zur fr-Achse bei y = 0,5; c) Schnitt senkrecht zur c-Achse bei z = 0,5.…”

unclassified

Zur Kristallchemie der Kupfer(II)-ZinkteIlurate Cu₅Zn₄Te₃O₁₈ und Cu_1,5Zn_1,5TeO₆, mit einer Notiz über Cu_1,5Co_1,5TeO₆ / On the Crystal Chemistry of the Copper(II) Zinc Tellurates Cu₅Zn₄Te₃O₁₈ and Cu_1,5Zn_1,5TeO₆ with a Note on Cu_1,5Co_1,5TeO₆

Wulff¹,

Müller‐Buschbaum²

1998

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

Single crystals of Cu5Zn4Te3O18 (I), Cu1.5Zn1.5TeO6 (II) and Cu1.5Co1.5TeO6 (III) have been prepared and investigated by X-ray work. The structure of (I) was solved in the monoclinic space group C32-C2, a = 14.834(2), b = 8.801(1), c = 10.375(2) Å, β = 93.27(2)°, Z = 4. (II) and (III) crystallize with cubic symmetry, space group Th7-Ia3̄, a(II) = 9.557(1), a(III) = 9.570(1) Å, Z = 8. (I) shows a complicated structure formed by TeO6 octahedra isolated from each other, Zn2O6 double tetrahedra and Zn2O8 double square pyramids. These polyhedra are incorporated into a network of edge and corner connected stretched CuO6 octahedra. (II) and (III) are isotypic to Cu3TeO6 and have a (Cu/M)3O6 octahedra network, statistically occupied by Cu2+ and Zn2+ or Cu2+ and Co2+.

show abstract

The crystal structure of CuTeO₄

Cited by 23 publications

References 3 publications

Copper tellurium oxides – A playground for magnetism

Copper tellurium oxides – A playground for magnetism

Electronic structure of CuTeO4 and its relationship to cuprates

Zur Kristallchemie der Kupfer(II)-ZinkteIlurate Cu₅Zn₄Te₃O₁₈ und Cu_1,5Zn_1,5TeO₆, mit einer Notiz über Cu_1,5Co_1,5TeO₆ / On the Crystal Chemistry of the Copper(II) Zinc Tellurates Cu₅Zn₄Te₃O₁₈ and Cu_1,5Zn_1,5TeO₆ with a Note on Cu_1,5Co_1,5TeO₆

Contact Info

Product

Resources

About

The crystal structure of CuTeO4

Cited by 23 publications

References 3 publications

Copper tellurium oxides – A playground for magnetism

Copper tellurium oxides – A playground for magnetism

Electronic structure of CuTeO4 and its relationship to cuprates

Zur Kristallchemie der Kupfer(II)-ZinkteIlurate Cu5Zn4Te3O18 und Cu1,5Zn1,5TeO6, mit einer Notiz über Cu1,5Co1,5TeO6 / On the Crystal Chemistry of the Copper(II) Zinc Tellurates Cu5Zn4Te3O18 and Cu1,5Zn1,5TeO6 with a Note on Cu1,5Co1,5TeO6

Contact Info

Product

Resources

About

The crystal structure of CuTeO₄

Zur Kristallchemie der Kupfer(II)-ZinkteIlurate Cu₅Zn₄Te₃O₁₈ und Cu_1,5Zn_1,5TeO₆, mit einer Notiz über Cu_1,5Co_1,5TeO₆ / On the Crystal Chemistry of the Copper(II) Zinc Tellurates Cu₅Zn₄Te₃O₁₈ and Cu_1,5Zn_1,5TeO₆ with a Note on Cu_1,5Co_1,5TeO₆