“…To the best of our knowledge, this is the first observation of a superconducting transition in 4 Hb -TaSe 2 . A similar enhancement of superconductivity has also been reported in similar structures of 4 Hb -TaS 2 and 6 R -TaS 2 very recently. − , Furthermore, the magnetic anisotropy of 4 Hb -TaSe 2 is characterized by the upper critical field in-plane ( H c2 ∥ ) to out-of-plane ( H c2 ⊥ ) ( H c2 ∥ / H c2 ⊥ = 7.5) ratio, which is significantly enhanced by about 3 times compared to the bulk 2 H -TaSe 2 . The details can be found in Figure S4.…”
supporting
confidence: 83%
“…Recently, the emerging natural bulk TMD VDWHs that share configurations similar to those of 2D VDWHs are ideal systems suitable for such studies. They are alternately stacked with octahedral ( T ) layers with CDW order and trigonal-prismatic ( H ) layers with superconductivity and different CDW orders. − Pressure is a clean, continuous, and reversible way to regulate the interlayer coupling by changing the interlayer distance without introducing any chemical impurities into VDWHs. , Pressure has also been broadly applied in bulk TMD systems to tune the electronic properties associated with the CDW states and superconductivity. − …”
van der Waals heterostructures (VDWHs) containing a charge-density wave (CDW) and superconductivity (SC) have revealed rich tunability in their properties, which provide a new route for optimizing their novel exotic states. The interaction between SC and CDW is critical to its properties; however, understanding this interaction within VDWHs is very limited. A comprehensive in situ study and theoretical calculation on bulk 4Hb-TaSe 2 VDWHs consisting of alternately stacking 1T-TaSe 2 and 1H-TaSe 2 monolayers are investigated under high pressure. Surprisingly, the superconductivity competes with the intralayer and adjacent-layer CDW order in 4Hb-TaSe 2 , which results in substantially and continually boosted superconductivity under compression. Upon total suppression of the CDW, the superconductivity in the individual layers responds differently to the charge transfer. Our results provide an excellent method to efficiently tune the interplay between SC and CDW in VDWHs and a new avenue for designing materials with tailored properties.
“…To the best of our knowledge, this is the first observation of a superconducting transition in 4 Hb -TaSe 2 . A similar enhancement of superconductivity has also been reported in similar structures of 4 Hb -TaS 2 and 6 R -TaS 2 very recently. − , Furthermore, the magnetic anisotropy of 4 Hb -TaSe 2 is characterized by the upper critical field in-plane ( H c2 ∥ ) to out-of-plane ( H c2 ⊥ ) ( H c2 ∥ / H c2 ⊥ = 7.5) ratio, which is significantly enhanced by about 3 times compared to the bulk 2 H -TaSe 2 . The details can be found in Figure S4.…”
supporting
confidence: 83%
“…Recently, the emerging natural bulk TMD VDWHs that share configurations similar to those of 2D VDWHs are ideal systems suitable for such studies. They are alternately stacked with octahedral ( T ) layers with CDW order and trigonal-prismatic ( H ) layers with superconductivity and different CDW orders. − Pressure is a clean, continuous, and reversible way to regulate the interlayer coupling by changing the interlayer distance without introducing any chemical impurities into VDWHs. , Pressure has also been broadly applied in bulk TMD systems to tune the electronic properties associated with the CDW states and superconductivity. − …”
van der Waals heterostructures (VDWHs) containing a charge-density wave (CDW) and superconductivity (SC) have revealed rich tunability in their properties, which provide a new route for optimizing their novel exotic states. The interaction between SC and CDW is critical to its properties; however, understanding this interaction within VDWHs is very limited. A comprehensive in situ study and theoretical calculation on bulk 4Hb-TaSe 2 VDWHs consisting of alternately stacking 1T-TaSe 2 and 1H-TaSe 2 monolayers are investigated under high pressure. Surprisingly, the superconductivity competes with the intralayer and adjacent-layer CDW order in 4Hb-TaSe 2 , which results in substantially and continually boosted superconductivity under compression. Upon total suppression of the CDW, the superconductivity in the individual layers responds differently to the charge transfer. Our results provide an excellent method to efficiently tune the interplay between SC and CDW in VDWHs and a new avenue for designing materials with tailored properties.
“…Thus, the Ru SACs@FeCo-LDH formed generates new electronic states near the Fermi level, suggesting a more conductive electronic structure. 36 This can be further shown by the partial density of states (PDOS) caused by the change of the electronic structure of Co, Fe, and Ru (Fig. S22, ESI†).…”
The single-atomic-site doping of oxophilic-metal (Ru) species in FeCo-LDH leads to the active atom reconstruction at symmetry-breaking interfaces and then the excellent catalytic performance for OER/HER and overall water splitting at large current densities.
“…In the differential conductance (d I /d V ) spectra measured with STM, there are insulating gaps for both surface terminations, and the Type-I surface has a slightly larger insulating gap than that on the Type-II surface 13 . It has recently been demonstrated that the insulating gap on the Type-I surface is an interlayer-dimerization-induced insulating gap and the smaller insulating gap on the Type-II surface is likely a Mott-insulating gap 18 , 19 . Fig.…”
Although the single-impurity Kondo physics has already been well understood, the understanding of the Kondo lattice where a dense array of local moments couples to the conduction electrons is still far from complete. The ability of creating and tuning the Kondo lattice in non-f-electron systems will be great helpful for further understanding the Kondo lattice behavior. Here we show that the Pb intercalation in the charge-density-wave-driven narrow-electronic-band system 1T-TaS2 induces a transition from the insulating gap to a sharp Kondo resonance in the scanning tunneling microscopy measurements. It results from the Kondo screening of the localized moments in the 13-site Star-of-David clusters of 1T-TaS2. As increasing the Pb concentration, the narrow electronic band derived from the localized electrons shifts away from the Fermi level and the Kondo resonance peak is gradually suppressed. Our results pave the way for creating and tuning many-body electronic states in layered narrow-electronic-band materials.
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