Using ferroelectric polarization to regulate and preserve the valley polarization in a HfN2/CrI3/In2Se3 heterotrilayer

2021 ◽  
Vol 103 (21) ◽  
Author(s):  
Baoxing Zhai ◽  
Ruiqing Cheng ◽  
Wen Yao ◽  
Lei Yin ◽  
Chenhai Shen ◽  
...  
Keyword(s):  
Ferroelectric Polarization ◽  
Valley Polarization

Revealing the many-body interactions and valley-polarization behavior in Re-doped MoS2 monolayers

2021 ◽  
Vol 118 (11) ◽  
pp. 113101
Author(s):  
Xiaoli Zhu ◽  
Siting Ding ◽  
Lihui Li ◽  
Ying Jiang ◽  
Biyuan Zheng ◽  
...  
Keyword(s):  
Many Body ◽  
Polarization Behavior ◽  
Valley Polarization ◽  
Mos2 Monolayers ◽  
The Many ◽  
Many Body Interactions

scholarly journals Spectroscopy of a tunable moiré system with a correlated and topological flat band

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaomeng Liu ◽  
Cheng-Li Chiu ◽  
Jong Yeon Lee ◽  
Gelareh Farahi ◽  
Kenji Watanabe ◽  
...  
Keyword(s):  
Band Structure ◽  
Twist Angle ◽  
Bilayer Graphene ◽  
Scanning Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Flat Band ◽  
Correlated Electron ◽  
Partial Filling ◽  
Valley Polarization ◽  
Spectroscopic Signatures

AbstractMoiré superlattices created by the twisted stacking of two-dimensional crystals can host electronic bands with flat energy dispersion in which enhanced interactions promote correlated electron states. The twisted double bilayer graphene (TDBG), where two Bernal bilayer graphene are stacked with a twist angle, is such a moiré system with tunable flat bands. Here, we use gate-tuned scanning tunneling spectroscopy to directly demonstrate the tunability of the band structure of TDBG with an electric field and to show spectroscopic signatures of electronic correlations and topology for its flat band. Our spectroscopic experiments are in agreement with a continuum model of TDBG band structure and reveal signatures of a correlated insulator gap at partial filling of its isolated flat band. The topological properties of this flat band are probed with the application of a magnetic field, which leads to valley polarization and the splitting of Chern bands with a large effective g-factor.

scholarly journals Valley Polarization in Monolayer Ferromagnetic FeCl: A First‐Principles Study

2021 ◽  
Vol 15 (7) ◽  
pp. 2000551
Author(s):  
Yunxia Liu ◽  
Zhengchun Zou ◽  
Wenqi Li ◽  
Lizhong Sun ◽  
Pan Zhou ◽  
...  
Keyword(s):  
First Principles ◽  
First Principles Study ◽  
Valley Polarization

Tunneling magnetoresistance and spin-valley polarization in magnetic silicene superlattices

2021 ◽  
Vol 103 (15) ◽  
Author(s):  
J. G. Rojas-Briseño ◽  
M. A. Flores-Carranza ◽  
P. Villasana-Mercado ◽  
S. Molina-Valdovinos ◽  
I. Rodríguez-Vargas
Keyword(s):  
Tunneling Magnetoresistance ◽  
Valley Polarization

Two-dimensional intrinsic ferrovalley GdI2 with large valley polarization

2021 ◽  
Vol 103 (12) ◽  
Author(s):  
Hai-Xia Cheng ◽  
Jun Zhou ◽  
Wei Ji ◽  
Yan-Ning Zhang ◽  
Yuan-Ping Feng
Keyword(s):  
Two Dimensional ◽  
Valley Polarization

Tuning the valley polarization in WS2 monolayers via control of active defect sites induced by photochemical doping

2021 ◽  
Vol 118 (12) ◽  
pp. 123103
Author(s):  
I. Demeridou ◽  
A. Papadopoulos ◽  
G. Kourmoulakis ◽  
L. Mouchliadis ◽  
E. Stratakis ◽  
...  
Keyword(s):  
Active Defect ◽  
Defect Sites ◽  
Valley Polarization

Broadband, High‐Sensitivity Graphene Photodetector Based on Ferroelectric Polarization of Lithium Niobate

2021 ◽  
pp. 2100245
Author(s):  
Heyuan Guan ◽  
Jiyu Hong ◽  
Xiaoli Wang ◽  
Jingyuan Ming ◽  
Zilong Zhang ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
High Sensitivity ◽  
Ferroelectric Polarization
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