scholarly journals Berry curvature-induced emerging magnetic response in two-dimensional materials

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
◽  
◽  
◽  
Keyword(s):  
Magnetic Response ◽  
Two Dimensional ◽  
Berry Curvature ◽  
Two Dimensional Materials

Flexible Piezoelectricity of Two-Dimensional Materials Governed by Effective Berry Curvature

2021 ◽  
pp. 8220-8228
Author(s):  
Yilimiranmu Rouzhahong ◽  
Chao Liang ◽  
Chong Li ◽  
Huashan Li ◽  
Biao Wang
Keyword(s):  
Two Dimensional ◽  
Berry Curvature ◽  
Two Dimensional Materials

scholarly journals Local Berry curvature signatures in dichroic angle-resolved photoelectron spectroscopy from two-dimensional materials

2020 ◽  
Vol 6 (9) ◽  
pp. eaay2730 ◽  
Author(s):  
Michael Schüler ◽  
Umberto De Giovannini ◽  
Hannes Hübener ◽  
Angel Rubio ◽  
Michael A. Sentef ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Great Promise ◽  
Two Dimensional ◽  
Topological Properties ◽  
Time Resolved ◽  
Berry Curvature ◽  
Two Dimensional Materials ◽  
Geometrical Character ◽  
Chern Insulators ◽  
Topological Character

Topologically nontrivial two-dimensional materials hold great promise for next-generation optoelectronic applications. However, measuring the Hall or spin-Hall response is often a challenge and practically limited to the ground state. An experimental technique for tracing the topological character in a differential fashion would provide useful insights. In this work, we show that circular dichroism angle-resolved photoelectron spectroscopy provides a powerful tool that can resolve the topological and quantum-geometrical character in momentum space. In particular, we investigate how to map out the signatures of the momentum-resolved Berry curvature in two-dimensional materials by exploiting its intimate connection to the orbital polarization. A spin-resolved detection of the photoelectrons allows one to extend the approach to spin-Chern insulators. The present proposal can be extended to address topological properties in materials out of equilibrium in a time-resolved fashion.

Redox-Active Approach Towards New Magnetic And Conductive Two-Dimensional Materials

2018 ◽  
Author(s):  
Penny Perlepe ◽  
Rodolphe Clérac ◽  
Itziar Oyarzabal ◽  
Corine Mathonière
Keyword(s):  
Two Dimensional ◽  
Active Approach ◽  
Redox Active ◽  
Two Dimensional Materials

scholarly journals Polarization-sensitive photodetectors based on three-dimensional molybdenum disulfide (MoS2) field-effect transistors

Nanophotonics ◽  
2020 ◽  
Vol 9 (16) ◽  
pp. 4719-4728
Author(s):  
Tao Deng ◽  
Shasha Li ◽  
Yuning Li ◽  
Yang Zhang ◽  
Jingye Sun ◽  
...  
Keyword(s):  
Molybdenum Disulfide ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Three Dimensional ◽  
Polarized Light ◽  
Optical Field ◽  
Two Dimensional ◽  
Polarization Ratio ◽  
Two Dimensional Materials

AbstractThe molybdenum disulfide (MoS2)-based photodetectors are facing two challenges: the insensitivity to polarized light and the low photoresponsivity. Herein, three-dimensional (3D) field-effect transistors (FETs) based on monolayer MoS2 were fabricated by applying a self–rolled-up technique. The unique microtubular structure makes 3D MoS2 FETs become polarization sensitive. Moreover, the microtubular structure not only offers a natural resonant microcavity to enhance the optical field inside but also increases the light-MoS2 interaction area, resulting in a higher photoresponsivity. Photoresponsivities as high as 23.8 and 2.9 A/W at 395 and 660 nm, respectively, and a comparable polarization ratio of 1.64 were obtained. The fabrication technique of the 3D MoS2 FET could be transferred to other two-dimensional materials, which is very promising for high-performance polarization-sensitive optical and optoelectronic applications.

scholarly journals Two-Dimensional Materials with Giant Optical Nonlinearities near the Theoretical Upper Limit

ACS Nano ◽  
2021 ◽  
Vol 15 (4) ◽  
pp. 7155-7167
Author(s):  
Alireza Taghizadeh ◽  
Kristian S. Thygesen ◽  
Thomas G. Pedersen
Keyword(s):  
Optical Nonlinearities ◽  
Two Dimensional ◽  
Upper Limit ◽  
Two Dimensional Materials
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