2020年8月24日 · 1 T -TaS 2 undergoes successive phase transitions upon cooling and eventually enters an insulating state of mysterious origin. Some consider this state to be a band insulator with interlayer...

2022年7月19日 · In this article, we review the recent progress of the scanning tunneling microscopy studies of 1 T -TaS 2 and 1 T -TaSe 2 for bulk single crystals and molecular beam epitaxy monolayer films. We focus on how to understand the Mott insulating state in the whole set of materials, even when the stacking order takes effect.

2024年4月23日 · In this study, we present a unique approach to unlock the intertwined two-dimensional Mott-insulator and three-dimensional band-insulator states in bulk 1T-TaS 2 crystals by structuring a...

2008年11月9日 · Here, we show the appearance of a series of low-temperature electronic states in 1T-TaS 2 with pressure: the Mott phase melts into a textured charge-density wave (CDW); superconductivity...

2024年4月11日 · Here, we synthesized TaS 2 monolayers in H and T phases using the molecular beam epitaxial (MBE) method and studied their electronic structures via angle-resolved photo-emission spectroscopy (ARPES). We found that the H phase TaS 2 (H-TaS 2) monolayer is metallic, with an energy band crossing the Fermi level.

2 insulator-to-superconductor transition induced by high pressure, charge doping, or isovalent substitution. By combining scanning tunneling microscopy measurements and first-principles calculations, we investigate the atomic scale electronic structure of the T-TaS Mott insulator and its evolution to the.

2020年8月25日 · 1T-TaS2是一种具有丰富物相的层状二维材料。 其在经过多个电荷密度波相变后，在低温下变为绝缘体。 而这一现象的起因一直存疑。 张焱课题组和合作者，从实验上对其电子结构和晶格结构进行了刻画，并揭示了其绝缘性的起因。

2 天之前 · An intriguing metal was discovered in a chiral charge density wave material, 1T-TaS2. The random substitution of S by Se induces a transition from an insulator to a metal with a strongly suppressed e...

2020年5月18日 · Here, scanning tunnelling microscopy reveals two distinct terminations of the charge order in 1 T -TaS 2, the sign of such a double-layer stacking pattern. However, spectroscopy at both...

南京大学温锦生教授提供了1T-TaS2单晶样品。 作为铜氧化物高温超导体的母体电子结构，Mott绝缘体物理一直被凝聚态物理领域广泛关注和研究。 在Mott绝缘体中，库仑排斥能U、单电子带宽W和能带填充数n的共同作用导致了Mott绝缘体-金属相变。