The crystal structure of rhodium silicide, RhSi

Geller, S.; Wood, Elizabeth A.

doi:10.1107/s0365110x54001314

Cited by 44 publications

(39 citation statements)

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“…1) between calculated and observed intensities for all but the three strongest reflections is 0.380. This value is probably good to within ±0.002 on the basis of changes occurring in intensities for different parameter values, and gives the same Se-Se distance in RhSe 2 as exists in CoSe 2 (Lewis & Elliot, 1940), namely 2.50 A. This is appreciably greater than the elementary Se-Se distance, 2.32 A (see Lewis & Elliot, 1940).…”

Section: Determination Of the Structurementioning

confidence: 89%

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The crystal structure of RhSe2

Geller¹,

Cetlin²

1955

Acta Cryst

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Section: Determination Of the Structurementioning

confidence: 89%

“…In the study of superconductivity of intermetallic systems in these Laboratories, many binary rhodium compounds have been investigated (Matthias, 1953(Matthias, , 1954Geller & Wood, 1954;Geller, 1955). The rhodium-selenium system is one of those in which superconductivity exists.…”

Section: Introductionmentioning

confidence: 99%

The crystal structure of RhSe2

Geller¹,

Cetlin²

1955

Acta Cryst

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“…Its bulk states host all of exotic fermionic quasiparticles mentioned above under different conditions. To our best knowledge, it is the first attempt to incorporate multiple types of topological fermions in a solid compound that has been synthesized experimentally [39][40][41][42]. Around the Fermi level, the conductance in CoSi-family compounds are mainly contributed by these unconventional excitations.…”

mentioning

confidence: 99%

“…Lattice structure of CoSi-family.-The family of transition metal silicides includes CoSi [39], RhSi [40], CoGe [41] and RhGe [42], which have been synthesized experimentally. All of them have the same cubic lattice with space group P2 1 3 (No.198) and similar electronic properties.…”

mentioning

confidence: 99%

Multiple Types of Topological Fermions in Transition Metal Silicides

Tang¹,

Zhou²,

Zhang³

2017

Phys. Rev. Lett.

411

432

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Exotic massless fermionic excitations with non-zero Berry flux, other than Dirac and Weyl fermions, could exist in condensed matter systems under the protection of crystalline symmetries, such as spin-1 excitations with 3-fold degeneracy and spin-3/2 Rarita-Schwinger-Weyl fermions. Herein, by using ab initio density functional theory, we show that these unconventional quasiparticles coexist with type-I and type-II Weyl fermions in a family of transition metal silicides, including CoSi, RhSi, RhGe and CoGe, when the spin-orbit coupling (SOC) is considered. Their non-trivial topology results in a series of extensive Fermi arcs connecting projections of these bulk excitations on side surface, which is confirmed by (010) surface electronic spectra of CoSi. In addition, these stable arc states exist within a wide energy window around the Fermi level, which makes them readily accessible in angle-resolved photoemission spectroscopy measurements.Introduction.-Three types of fermions play fundamental roles in our understanding of nature: Majorana, Dirac and Weyl [1]. Much attention has been paid to looking for these fundamental particles in high energy physics during past few decades, whereas only signature of Dirac fermions is captured. Interestingly, the same movement comes up in the field of condensed matter physics [2], and great achievements have been made in last few years. For example, the Majorana-like excitations are detected in superconducting heterostructures [3][4][5][6]; the Dirac [7][8][9][10][11][12] and Weyl [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] fermions are observed in some compounds. These quasiparticles in solid states are not only important for basic science, but also show great potential for practical applications on new devices [30,31].Because symmetries in condensed matter physics are usually much lower than the Poincaré symmetry in high energy physics, quasiparticles in solid states are less constrained such that various new types of fermionic excitations are predicted to exist in 3D lattices [32]. Among these allowed by space group (SG) symmetries are spin-1 and spin-3/2 massless fermionic excitations, besides the well-known spin-1/2 case, namely the Weyl fermion. All of these massless quasiparticles can be described by the low energy Hamiltonian in a unified manner to the linear order of momentum

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“…PtSi has B31 orthorhombic crystal structure and a high density of electron states at the Fermi level, which produces low electrical resistivity of 35 lX cm, a short Thomas-Fermi screening length of 0.06 nm, and even superconductivity at low temperatures (T c $ 0.5 K). RhSi forms a cubic crystal structure 47 and has similarly low resistivity. The low resistivity is exploited to produce devices with low-parasitic resistance and thus high operating frequency.…”

Section: Schottky Barrier Detectorsmentioning

confidence: 99%

Platinum and Rhodium Silicide–Germanide Optoelectronics

Lepselter¹,

Fiory

Ravindra

2007

Journal of Elec Materi

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Since the introduction of SiO 2 /Si devices in the 1960s, the only basic change in the design of a MOSFET has been in the gate length. The channel thickness has fundamentally remained unchanged, as the inversion layer in a silicon MOSFET is still about 10 nm thick. Bipolar transistor base widths have been of sub-micron dimensions all this time. It is time for a new property to be exploited in concert with the high mobility strained-silicon channels and silicon-germanium alloys. This property is the inherently low parasitic series resistance of Schottky barrier contacts. Schottky contacts, beam leads, and microbridges, while originally developed in silicon, have been successfully integrated into compound semiconductors for optoelectronics. Reintroduction of these technologies in optoelectronics based on silicon-germanium is proposed. Several new applications using platinum and rhodium compounds of silicon and germanium are presented.

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The crystal structure of rhodium silicide, RhSi

Cited by 44 publications

References 1 publication

The crystal structure of RhSe2

The crystal structure of RhSe2

Multiple Types of Topological Fermions in Transition Metal Silicides

Platinum and Rhodium Silicide–Germanide Optoelectronics

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