Soft x-ray irradiation induced metallization of layered TiNCl

Kataoka, Noriyuki; Tanaka, Masashi; Hosoda, Wataru; Taniguchi, Tadatsugu; Fujimori, Shin–ichi; Wakita, Takanori; Muraoka, Yuji; Yokoya, Takayoshi

doi:10.1088/1361-648x/abbbc3

Cited by 5 publications

(4 citation statements)

References 53 publications

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“…Second, the Ti 2 p HAXPES spectrum consists of two peaks at around 457.5 and 463.5 eV, corresponding to the spin–orbit split of Ti 2 p 3/2 and Ti 2 p 1/2 , respectively, as shown in Figure a. The Ti 2 p 3/2 peak has a broad shoulder-like component in the lower binding energy side, similar to the valence splitting of previously reported electron-doped samples. , …”

Section: Results and Discussionsupporting

confidence: 78%

“…The Ti 2p 3/2 peak has a broad shoulder-like component in the lower binding energy side, similar to the valence splitting of previously reported electron-doped samples. 33,34 Third, the prominent peaks of TiNCl_A shift to the higher binding energy side about 0.3 eV compared to TiNCl_C, even though the sample was not a Na-doped one. The same chemical shift is also observed in the core-level spectrum of the other elements N 1s and Cl 2p (Figure S4).…”

Section: Resultsmentioning

confidence: 99%

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Synthetic Route of Layered Titanium Nitride Chloride TiNCl Using Sodium Amide

et al. 2022

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A synthetic route in a closed system for layered titanium nitride chloride TiNCl has been developed using sodium amide NaNH2 as a nitrogen source. A highly crystalline sample is obtained by an appropriate thermal decomposition of aminated titanium chloride. The obtained TiNCl was also characterized using electronic resistivity measurement and photoemission spectroscopy. TiNCl showed hopping conduction compatible with an in-gap state revealed by photoelectron spectroscopy. However, it appeared highly electron-doped, albeit without showing superconductivity. Comparison with the spectrum of superconducting sodium-doped samples suggests the presence of the microstructure required to exhibit superconductivity.

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Section: Results and Discussionsupporting

confidence: 78%

Section: Resultsmentioning

confidence: 99%

Synthetic Route of Layered Titanium Nitride Chloride TiNCl Using Sodium Amide

et al. 2022

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“…The peak at 396.5 eV belongs to N 3− 1s. The peaks at 198.1 and 199.7 eV correspond to Cl 2p 3/2 and 2p 1/2 , respectively [9]. As shown in Fig.…”

Section: Resultsmentioning

confidence: 85%

“…Layered metal nitrogen halides (MNXs) are composed of metal nitride layers sandwiched by two halogen layers [1][2][3][4][5][6][7]. For example, TiNCl is composed of metallic orthogonal Ti-N layers and loosely packed Cl atomic layers to form a sandwich structure [8,9]. TiNCl is a semiconductor with a relatively narrow band gap of 1.4 eV, which can be applied as photocatalysis and photovoltaic materials in solar cells [6,10].…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional TiNCl for capacitive-like lithium-ion storage

et al. 2022

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In this study, TiNCl was designed and applied in high-rate lithium-ion batteries (LIBs), and the mechanism of the energy storage in TiNCl was uncovered. The Ti-N layer serves as the electronic conductive unit for its high conductivity, while the polyhedral channels constructed with Cl facilitate the transmission of Li ions serving as the ionic conductive units. In addition, due to the negatively charged nature of Cl, the TiNCl anode has a capacitive contribution up to 99.5% at 1 mV s −1 . Even at a high rate of 50 C, it still retains a remarkable reversible capacity of 202 mA h g −1 after 1000 cycles. The concept based on the structure design develops new electrode materials with desired properties.

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Observation of periodic structures and pseudogaps in pristine compound α-TiNCl by STM/STS and break junction methods

Sugimoto

Matsumoto

Saito

et al. 2023

Low Temperature Physics

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Scanning tunneling microscopy and spectroscopy (STM/STS) and break-junction tunnel spectroscopy (B.TTS) measurements are performed on the pristine layered α-TiNCl semiconductor (pri-TiNCl), being the precursor of superconducting nitride chlorides. The STM topography of pri-TiNCl shows basic crystal structures with the lattice periods of a0≈ 0.38 nm and b0≈ 0.31 nm, ensuring that a clean a–b surface of micro-single crystals is obtained. From the STS measurements, the averaged conductance versus voltage dependence dI/dV(V) reveals kink structures at relatively high bias voltages of |F| ∼ −50 mV and −100 mV. The spatial (r-) conductance distributions dI/dV (V, r) (dI/dV maps) proportional to those of quasiparticle local densities of states (LDOSes) exhibit the bias-independent streak structures with the period of (4.8 ± 0.2) b0, which are predominantly observed within the range of |V| < 95 mV. The temperature dependence of the dI/dV B.TTS spectra shows the gap structure with the energy scale of 4Σ = 180 meV vanishing at Ts ∼ 120 K. Thus, the ratio of the gap Σ to the transition temperature Ts is 2Σ/kBTs ∼ 10. Here, kB is the Boltzmann constant. Such a ratio is typical of the pseudogap features in cuprate superconductors and dielectric gap characteristics in layered chalcogenides with charge-density waves.

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Soft x-ray irradiation induced metallization of layered TiNCl

Cited by 5 publications

References 53 publications

Synthetic Route of Layered Titanium Nitride Chloride TiNCl Using Sodium Amide

Synthetic Route of Layered Titanium Nitride Chloride TiNCl Using Sodium Amide

Two-dimensional TiNCl for capacitive-like lithium-ion storage

Observation of periodic structures and pseudogaps in pristine compound α-TiNCl by STM/STS and break junction methods

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