Single crystal raman studies of pyrite-type RuS2, RuSe2, OsS2, OsSe2, PtP2, and PtAs2

Müller, Beate; Lutz, H. D.

doi:10.1007/bf00202242

Cited by 22 publications

(10 citation statements)

References 14 publications

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“…The lattice parameters optimized using DFT calculations are a = b = c = 6.08 Å (OsSe 2 ) / 6.47 Å (OsTe 2 ). These values are close to the values reported by previous experimental investigations [34,36].…”

Section: Resultssupporting

confidence: 92%

“…Crystal Structure and Bulk Electronic Band Structure OsSe 2 and OsTe 2 are both transition metal dichalcogenides crystallized in pyrite-type structure. The single crystals of pyrite-type OsSe 2 and OsTe 2 can be synthesized via chemical vapor transport and are shown to be stable in ambient conditions [34]. Other crystalline forms of these two materials have not been reported.…”

Section: Resultsmentioning

confidence: 99%

“…Other crystalline forms of these two materials have not been reported. The pyrite structure of OsSe 2 and OsTe 2 is chemically stable and robust against high temperature and pressure [34,35]. The crystal structure of OsSe 2 and OsTe 2 belongs to the space group P a3 (SG 205) and is shown in Figure 1 (a).…”

Section: Resultsmentioning

confidence: 99%

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Selective control of surface spin current in topological pyrite-type OsX2 (X = Se, Te) crystals

2019

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Topological materials host robust surface states, which could form the basis for future electronic devices. As such states have spins that are locked to the momentum, they are of particular interest for spintronic applications. Understanding spin textures of the surface states of topologically nontrivial materials, and being able to manipulate their polarization, is therefore essential if they are to be utilized in future technologies. Here we use first-principles calculations to show that pyrite-type crystals OsX 2 (X= Se, Te) are a class of topological material that can host surface states with spin polarization that can be either in-plane or out-of-plane. We show that the formation of low-energy states with symmetry-protected energy-and direction-dependent spin textures on the (001) surface of these materials is a consequence of a transformation from a topologically trivial to nontrivial state, induced by spin orbit interactions. The unconventional spin textures of these surface states feature an in-plane to out-of-plane spin polarization transition in the momentum space protected by local symmetries. Moreover, the surface spin direction and magnitude can be selectively filtered in specific energy ranges. Our demonstration of a new class of topological material with controllable spin textures provide a platform for experimentalists to detect and exploit unconventional surface spin textures in future spin-based nanoelectronic devices. *

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

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Selective control of surface spin current in topological pyrite-type OsX2 (X = Se, Te) crystals

2019

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“…Raman spectroscopic analysis of the OsS 2 showed an intense peak at ~ 354 cm -1 and a weak peak at ~ 393 cm -1 (Figure 2), which is consistent with the literature (Müller 1991). No spectral data above 500 cm -1 was reported by Müller, but a weak peak near 900 cm -1 was noted.…”

Section: Oss 2 Synthesis and Characterizationsupporting

confidence: 89%

Accelerator-based production of the 99mTc-186Re diagnostic-therapeutic pair using metal disulfide targets (MoS2, WS2, OsS2)

Gott

Hayes

Wycoff

et al. 2016

Applied Radiation and Isotopes

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Novel, natural abundance metal disulfide targets were irradiated for 1h with a 10µA proton beam in a small, medical cyclotron. Osmium disulfide was synthesized by simple distillation and precipitation methods while MoS2 and WS2 were commercially available. The targets dissolved under mild conditions and were analyzed by γ-spectroscopy. Production rates and potential applications are discussed, including target recovery and recycling schemes for OsS2 and WS2.

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“…The first and second peaks are attributed to E g and A g vibrational modes. 37,38 RuS 2 main peaks were located at 378.9, 391.8, and 410.1 cm −1 . The first two peaks of RuS 2 belong to the E g or T g mode, and the 410.1 cm −1 peak corresponds to the A g mode.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Highly Active Rhenium-, Ruthenium-, and Iridium-Based Dichalcogenide Electrocatalysts for Oxygen Reduction and Oxygen Evolution Reactions in Aprotic Media

et al. 2020

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Transition metal dichalcogenides (TMDCs) have garnered much attention recently due to their remarkable performance for different electrochemical systems. In this study, we report on the synthesis and catalysis of less studied TMDC nanoflakes (NFs) with a design space comprised of three transition metals (rhenium, ruthenium, and iridium) and three chalcogens (sulfur, selenium, and tellurium) for the oxygen reduction and evolution reactions (ORR and OER) in an aprotic hybrid electrolyte containing 0.1 M lithium bis(trifluoromethanesulfonyl)imide salt in 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid and dimethyl sulfoxide. Our results indicate that among the tested catalysts, ReS2 exhibits the highest current density for both ORR and OER, beyond those of the state-of-the-art catalysts used in aprotic media with Li salts. We performed density functional calculations to provide a mechanistic understanding of the reactions in the ReS2 NFs/ionic liquid system. These novel bifunctional catalyst results could open a way for exploiting the unique properties of these materials in Li–O2 batteries as well as other important electrochemical systems.

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Single crystal raman studies of pyrite-type RuS2, RuSe2, OsS2, OsSe2, PtP2, and PtAs2

Cited by 22 publications

References 14 publications

Selective control of surface spin current in topological pyrite-type OsX2 (X = Se, Te) crystals

Selective control of surface spin current in topological pyrite-type OsX2 (X = Se, Te) crystals

Accelerator-based production of the 99mTc-186Re diagnostic-therapeutic pair using metal disulfide targets (MoS2, WS2, OsS2)

Highly Active Rhenium-, Ruthenium-, and Iridium-Based Dichalcogenide Electrocatalysts for Oxygen Reduction and Oxygen Evolution Reactions in Aprotic Media

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