2015年2月17日 · Here we investigate, using photoemission, X-ray scattering and scanning tunnelling microscopy, the canonical CDW compound 2H-NbSe2 intercalated with Mn and Co, and show that the conventional view...

2017年8月30日 · Atomic-resolution scanning transmission electron microscope imaging reveals the atomic structure of the intrinsic point defects and grain boundaries in monolayer NbSe 2, and confirms the low...

2016年9月16日 · We perform scanning tunneling microscopy simulations and find that the images noticeably change with the sign and magnitude of the voltage bias. The atomic corrugation of the Se sublayer induced by the modulation plays a primary role in leading to these images, but the electronic reorganization also has an important contribution.

2014年2月18日 · By comparing 2 𝐻 − NbSe 2 and its isostructural partner 2 H -NbS 2 which shows superconductivity but lacks the charge density wave order, we demonstrate that the superconducting mode in 2 𝐻 − NbSe 2 owes its spectral weight to the presence of the coexisting charge density wave order.

2024年10月2日 · Here, by using angle-resolved photoemission spectroscopy, we revisit the charge density wave order and study the effects of uniaxial strain on the electronic structure of …

2013年7月8日 · We report the direct observation in real space of the charge density wave (CDW) phase transition in pristine 2H-NbSe2 using atomic-resolution scanning tunneling microscopy (STM). We find that static CDW order is established in nanoscale regions in the vicinity of defects at temperatures that are several times the bulk transition temperature Tcdw.

2019年4月18日 · Bulk and single-layer 2H-NbSe2 exhibit identical charge density wave order (CDW) with a quasi-commensurate 3 × 3 superlattice periodicity. Here we combine scanning tunnelling microscopy (STM) imagi...

2024年7月30日 · Here, we investigated the effects of large, uniform biaxial compressive strain on the superconducting phase transition of multilayered 2H-NbSe 2 flakes. We observed a consistent decrease in the critical temperature of NbSe 2 flakes induced by the large thermal compression of a polymeric substrate (>1.2%) at cryogenic temperatures.

多频段电荷密度波作为一种非常重要的不稳定电子性，可能产生新颖的结构，目前人们对多能带超导现象进行广泛和深入的研究，但是人们通常忽略电荷密度波的多带电荷密度波（CDWs）。 有鉴于此， 日内瓦大学Árpád Pásztor、Christoph Renner等 报道能量分辨 扫描隧道显微镜 以简单的电荷累积模型、计算结果自洽的多带电荷密度波CDW能带结合， 揭示二维过渡金属卤化物2H-NbSe2材料具有多带电荷密度波CDW。 本文要点：（1） CDW不仅仅能够在K点附近的内能 …

2022年8月3日 · The phase evolves from a mixture phase (2H + 4H) for the pristine NbSe 2 to Fe intercalated 2H phase for 0 < x < 0.20, which transforms to the 2H(I) phase with a 2a o × 2a o × 1c o ordered superstructure for 0.2 ≤ x ≤ 0.25 and finally to the 2H(II) phase with a × 1c o ordered superstructure for 0.33 ≤ x ≤ 0.5 in Fe x NbSe 2 at the ...