2021年11月19日 · Using MBE, we can achieve controlled growth of the 1T and 1H polymorphs of monolayer NbSe 2 (Fig. 1, A and B) on both graphite and graphene substrates by changing the growth temperature and the Se-to-Nb flux ratio.

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...

2023年7月1日 · The 2D NbSe 2 flakes were grown in an ultrahigh vacuum molecular beam epitaxy (MBE) system with a base pressure of 1 × 10 −8 Pa. After cleaving in the atmosphere with a scotch tape, the HOPG substrates were transferred into the load-lock chamber promptly and degassed at ∼870 °C for several hours before use.

2018年5月3日 · In this paper, we report the MBE growth of highly oriented monolayer NbSe 2, and its characterization by scanning tunneling microscopy (STM), angle-resolved photoemission spectroscopy (ARPES),...

6 天之前 · a, A typical large-scale topographic image of MBE-grown NbSe 2 layers on graphene. The image was taken with a feedback set-point current I set = 100 pA at a sample bias voltage V set = +0.5 V. b ...

2023年9月1日 · We observe a distinct double-gap superconducting spectrum on monolayer MnTe that is absent on the NbSe 2 substrate. The subgap character exhibits a moiré-related oscillation in real space, which can be well described by an effective two-band model.

2022年10月，两篇关于NbSe2超导特性的工作先后发表于Nature Physics和Nature Materials，基于Quantum Design综合物性测量系统PPMS获得的电磁输运数据，对材料超导性的研究和判定，起到了关键性作用。 Nature Physics：插层NbSe2块材中的可调控Ising超导性

2021年6月19日 · Here we grow single-unit-cell (1UC) FeTe film on NbSe2 single crystal by molecular beam epitaxy (MBE) and investigate the film in-situ with home-made cryogenic scanning tunneling microscopy (STM) and non-contact atomic force …

Monolayer NbSe2, has recently been recognized as an intrinsic monolayer superconductor, due to the occurrence of superconductivity without the need of a special substrate4. NbSe2 crystallizes in the same layered hexagonal structure as 2H-MoS2, where the niobium atoms sit at the center of trigonal selenium prisms.

2022年10月1日 · In this paper, we conduct a study on a few-layer Nb 1+x Se 2 grown by MBE on SiO 2 /Si substrates. A single crystal bulk 2H–NbSe 2 sample grown by chemical vapor transport (CVT) was used as a reference. The MBE-grown material was characterized by X-ray photoelectron spectroscopy (XPS) and STM.