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Low-cost imaging technique shows how smartphone batteries could charge in minutes 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:12/0  |  提交时间:2021/07/26
Microbes in ocean play important role in moderating Earth's temperature 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2021/06/24
Microbes in ocean play important role in moderating Earth's temperature 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2021/06/24
Research could dramatically lower cost of electron sources 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:9/0  |  提交时间:2021/02/10
Harnessing the power of AI to understand warm dense matter 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:7/0  |  提交时间:2021/02/10
Researchers measure, model desalination membranes to maximize flow, clean more water 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:6/0  |  提交时间:2021/01/06
Catalytic activity of individual cobalt oxide nanoparticles determined 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:6/0  |  提交时间:2020/12/22
Protein aggregates nucleate ice: the example of apoferritin 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (6) : 3291-3315
作者:  Cascajo-Castresana, Maria;  David, Robert O.;  Iriarte-Alonso, Maiara A.;  Bittner, Alexander M.;  Marcolli, Claudia
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
Pathways toward realizing the promise of all-solid-state batteries 新闻
来源平台:EurekAlert! - Earth Science. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:11/0  |  提交时间:2020/03/26
Strongly correlated electrons and hybrid excitons in a moire heterostructure 期刊论文
NATURE, 2020, 580 (7804) : 472-+
作者:  Banerjee, Antara;  Fyfe, John C.;  Polvani, Lorenzo M.;  Waugh, Darryn;  Chang, Kai-Lan
收藏  |  浏览/下载:28/0  |  提交时间:2020/07/03

Two-dimensional materials and their heterostructures constitute a promising platform to study correlated electronic states, as well as the many-body physics of excitons. Transport measurements on twisted graphene bilayers have revealed a plethora of intertwined electronic phases, including Mott insulators, strange metals and superconductors(1-5). However, signatures of such strong electronic correlations in optical spectroscopy have hitherto remained unexplored. Here we present experiments showing how excitons that are dynamically screened by itinerant electrons to form exciton-polarons(6,7) can be used as a spectroscopic tool to investigate interaction-induced incompressible states of electrons. We study a molybdenum diselenide/hexagonal boron nitride/molybdenum diselenide heterostructure that exhibits a long-period moire superlattice, as evidenced by coherent hole-tunnelling-mediated avoided crossings of an intralayer exciton with three interlayer exciton resonances separated by about five millielectronvolts. For electron densities corresponding to half-filling of the lowest moire subband, we observe strong layer pseudospin paramagnetism, demonstrated by an abrupt transfer of all the (roughly 1,500) electrons from one molybdenum diselenide layer to the other on application of a small perpendicular electric field. Remarkably, the electronic state at half-filling of each molybdenum diselenide layer is resilient towards charge redistribution by the applied electric field, demonstrating an incompressible Mott-like state of electrons. Our experiments demonstrate that optical spectroscopy provides a powerful tool for investigating strongly correlated electron physics in the bulk and paves the way for investigating Bose-Fermi mixtures of degenerate electrons and dipolar excitons.


Optical spectroscopy is used to probe correlated electronic states in a moire heterostructure, showing many-body effects such as strong layer paramagnetism and an incompressible Mott-like state of electrons.