Crafting the Straintronics and Twistronics with Artificial 2D Hybrid Quantum Materials

Shao-Yu Chen^3,1*, Chuan-Yu Chang², Min-Jia Zhang⁴, Chi Tai Chang⁴

¹凝態科學研究中心, 國立臺灣大學, 台北市, Taiwan
²物理所, 國立臺灣大學, 台北市, Taiwan
³新穎材料原子級科學研究中心, 國立臺灣大學, 台北市, Taiwan
⁴物理學系, 國立台灣師範大學, 台北市, Taiwan

* Presenter:Shao-Yu Chen, email:shaoyuchen@ntu.edu.tw

The advent of atomically thin materials brings out innovative paradigms, examining the intricate relationships among charge, spin, lattice, valley, and photons. Particularly striking are the quantum effects observed when layering two-dimensional (2D) materials. A notable example is the pioneering study demonstrating that two graphene layers twisted at specific "magic" angles can exhibit insulating or superconductivity. This approach paves the way to developing artificial 2D hybrid quantum materials that merge various 2D materials deliberately, unlocking groundbreaking functions and expanding the horizon of quantum materials. In my talk, I will share our latest advances in crafting artificial 2D hybrid materials with meticulous control over twist angles and strain. We integrate the 2D materials stacking technologies with a handful of optical spectroscopy, including second harmonic generation, absorption, photoluminescence, and Raman spectroscopy. Our homemade system can facilitate in-situ monitoring and precisely controls strain and twist-angle. Our research is a stepping stone toward realizing the full potential of 2D materials, potentially leading to breakthroughs in quantum computing, exciton physics, and other emergent fields.

Keywords: straintronics, twistronics, 2D materials, hybrid 2D materials, optical spectroscopy