Phosphides: Solid‐State Chemistry

Pöttgen, Rainer; Hönle, Wolfgang

doi:10.1002/9781119951438.eibc0170

Cited by 22 publications

(34 citation statements)

References 316 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Polyphosphides are known to form a variety of crystal structures with different elements [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. From three-dimensional frameworks to isolated cages, phosphorous backbones form a wide range of stable structures.…”

Section: Introductionmentioning

confidence: 99%

Zintl Salts Ba2P7X (X = Cl, Br, and I): Synthesis, Crystal, and Electronic Structures

Dolyniuk

Kovnir

2013

Crystals

View full text Add to dashboard Cite

Two barium phosphide halides, Ba 2 P 7 Br and Ba 2 P 7 I, were synthesized and structurally characterized by single crystal X-ray diffraction. Both compounds crystallize in the monoclinic space group P2 1 /m (No. 11) and are isostructural to Ba 2 P 7 Cl. The crystal structures of Ba 2 P 7 X (X = Cl, Br, I) feature the presence of heptaphosphanortricyclane P 7 3− clusters along with halogen anions and barium cations. According to the Zintl concept, Ba 2 P 7 X compounds are electron-balanced semiconductors. Quantum-chemical calculations together with UV-Visible spectroscopy confirm the title compounds are wide bandgap semiconductors. The bonding in the P 7 3− clusters was analyzed by means of electron localization function. The elemental compositions were confirmed using energy dispersive X-ray spectroscopy.

show abstract

Section: Introductionmentioning

confidence: 99%

Zintl Salts Ba2P7X (X = Cl, Br, and I): Synthesis, Crystal, and Electronic Structures

Dolyniuk

Kovnir

2013

Crystals

View full text Add to dashboard Cite

show abstract

“…3(a)]. The structure has angular P 3 -chains, with each P atom lying in the center of a trigonal prism formed by six K + ions [44,45]. The detailed structure information can be found in Ref.…”

mentioning

confidence: 99%

Type-II nodal loops: Theory and material realization

et al. 2017

View full text Add to dashboard Cite

Nodal loop appears when two bands, typically one electron-like and one hole-like, are crossing each other linearly along a one-dimensional manifold in the reciprocal space. Here we propose a new type of nodal loop which emerges from crossing between two bands which are both electron-like (or hole-like) along certain direction. Close to any point on such loop (dubbed as a type-II nodal loop), the linear spectrum is strongly tilted and tipped over along one transverse direction, leading to marked differences in magnetic, optical, and transport responses compared with the conventional (type-I) nodal loops. We show that the compound K4P3 is an example that hosts a pair of type-II nodal loops close to the Fermi level. Each loop traverses the whole Brillouin zone, hence can only be annihilated in pair when symmetry is preserved. The symmetry and topological protections of the loops as well as the associated surface states are discussed.Topological metals and semimetals have become a focus of current physics research [1,2]. These materials feature nontrivial band-crossings in their low-energy band structures, around which the quasiparticles behave drastically different from the usual Schrödinger-type fermions. Depending on its dimensionality, the crossing manifold may take zero-dimensional (nodal point), onedimensional (nodal loop), or two-dimensional (nodal surface) form [3]. There has already been extensive studies on nodal points, especially on so-called Weyl and Dirac semimetal materials [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Recently, nodal loops begin to attract considerable interest: several nodal-loop materials have been proposed, with interesting physical consequences revealed [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33].Consider the generic case of a nodal loop formed by the linear crossing between two bands in a three-dimensional system. Close to any point P on the loop, the dispersion is linear along the two transverse directions of the loop, and is at least quadratic along the tangential direction. The low-energy effective model near P can be expressed as (set = 1)up to first order in the wave-vector q measured from P . Here q i 's (i = 1, 2) are the components of q along two orthogonal transverse directions [see Fig. 1(a)], v i 's are

show abstract

“…This presentation is solely based on the geometrical motif; however, such propeller-like substructures can easily be distinguished from each other. This building pattern is similar to the structural chemistry of metalrich phosphides [1,2].…”

Section: Discussionmentioning

confidence: 98%

“…Besides, many cage clusters, chains, and tubular substructures are known. The crystal chemical concepts of these materials are reviewed in [2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Lead-flux Growth of Eu₄Ir₈As₇ Crystals

Pfannenschmidt¹,

Pöttgen²

2013

Zeitschrift Für Naturforschung B

Self Cite

View full text Add to dashboard Cite

Single crystals of the new arsenide Eu 4 Ir 8 As 7 were grown from a lead flux. The structure was refined on the basis of single-crystal X-ray diffractometer data: Ca 4 Ir 8 P 7 type, P2 1 /m, a = 1311.3(1), b = 408.4(1), c = 1360.3(1) pm, β = 98.45(1) • , wR2 = 0.0640, 1985 F 2 values, 95 variables. The iridium and arsenic atoms in the Eu 4 Ir 8 As 7 structure build up a complex three-dimensional, covalently bonded [Ir 8 As 7 ] network with Ir-As distances ranging from 239 to 260 pm. Each iridium atom has three or four arsenic neighbors in slightly distorted trigonal-planar or tetrahedral coordination. The four crystallographically independent europium atoms fill cavities of coordination numbers 12, 13, and 15 (2 ×) within the [Ir 8 As 7 ] network. Parts of the Eu 4 Ir 8 As 7 structure resemble known simpler structure types, and one can describe the Eu 4 Ir 8 As 7 structure as an intergrowth variant of CaBe 2 Ge 2 -, TiNiSi-and AlB 2 -related slabs.

show abstract

Phosphides: Solid‐State Chemistry

Cited by 22 publications

References 316 publications

Zintl Salts Ba2P7X (X = Cl, Br, and I): Synthesis, Crystal, and Electronic Structures

Zintl Salts Ba2P7X (X = Cl, Br, and I): Synthesis, Crystal, and Electronic Structures

Type-II nodal loops: Theory and material realization

Lead-flux Growth of Eu₄Ir₈As₇ Crystals

Contact Info

Product

Resources

About

Phosphides: Solid‐State Chemistry

Cited by 22 publications

References 316 publications

Zintl Salts Ba2P7X (X = Cl, Br, and I): Synthesis, Crystal, and Electronic Structures

Zintl Salts Ba2P7X (X = Cl, Br, and I): Synthesis, Crystal, and Electronic Structures

Type-II nodal loops: Theory and material realization

Lead-flux Growth of Eu4Ir8As7 Crystals

Contact Info

Product

Resources

About

Lead-flux Growth of Eu₄Ir₈As₇ Crystals