Twistronics has emerged as a transformative frontier in condensed matter physics, offering unprecedented control over quantum phenomena through the relative rotation of two-dimensional materials. By varying the twist angle between atomically thin layers, moiré superlattices are formed, dramatically reshaping electronic band structures and enabling the emergence of correlated and topological quantum phases that are absent in the constituent materials.

Recent breakthroughs have highlighted the remarkable versatility of moiré systems as highly tunable platforms for exploring quantum matter. In twisted graphene and semiconducting transition-metal dichalcogenides, for instance, moiré flat bands can host a rich variety of quantum phases, including unconventional superconductivity, correlated insulators, and integer and fractional Chern insulators, all of which can be controlled through electrostatic gating and twist-angle engineering. This exceptional tunability, together with the ability to engineer band topology and interaction strength, makes moiré systems powerful quantum simulators for investigating strongly correlated and topological quantum phenomena.

This special topic seeks cutting-edge contributions on flat-band physics and strong correlations, moiré superconductivity, topological states in twisted systems, moiré excitons and light–matter interactions, orbital magnetism and quantum anomalous Hall effects, and novel moiré materials beyond graphene, alongside advances in fabrication and characterization techniques that push the resolution and precision of twist-angle control.

We invite reviews, views & perspectives, and original research to map the field's theoretical and experimental frontiers. Publication fees are waived, and all articles will be open access. Manuscripts should be submitted online at https://mc.manuscriptcentral.com/fop.

· Original Research (Regular Article) reports complete, self-contained novel findings. There is no mandatory word limit. Manuscripts typically range from 6,000 to 12,000 words, with 5–10 figures and optional tables. Detailed raw data and lengthy derivations can be placed in supplemental materials. 

· While there are no strict length restrictions for articles, reviews should have a minimum length of 15 pages. Two categories of review articles are welcome: i) Review: A comprehensive, authoritative overview of an established or rapidly maturing research area, suitable as an entry point for graduate students. Length: >30 journal pages (approximately 20,000–40,000 words); figures: 15–50. ii) Topical Review: A focused, self-contained survey of a specific emerging topic or technique. Length: 15–25 journal pages (approximately 8,000–15,000 words); figures: 5–15.

· The Views & Perspectives article is structured as a concise, forward-looking commentary. The manuscript length is 3,000–5,000 words, accompanied by 1–3 figures that provide compact, high-level schematic summaries and key conceptual illustrations. No excessive technical derivations or redundant graphical materials are included, in line with the column’s goal of delivering accessible, insightful, and perspective-oriented discussions of emerging research trends.

Sincerely,

Tingxin Li (Shanghai Jiao Tong University)

E-mail: txli89@sjtu.edu.cn

https://www.physics.sjtu.edu.cn/jsml/litingxin.html

Call for Papers: Special Topic: Non-Hermitian Physics
Editors: Peng Xue, Lan Yang & Wuming Liu

Non-Hermitian physics has emerged as a vibrant and rapidly growing field, challenging traditional paradigms in quantum mechanics and condensed matter physics. Unlike Hermitian systems, which are governed by Hamiltonians with real eigenvalues and unitary time evolution, non-Hermitian systems exhibit complex eigenvalues and non-unitary dynamics, leading to novel phenomena such as exceptional points, parity-time (PT) symmetry breaking, and non-Hermitian topological phases. These unique features have opened up new avenues for exploring fundamental physics and have found applications in diverse areas, including photonics, condensed matter, quantum optics, and metamaterials.

Recent advances in non-Hermitian physics have revealed intriguing connections between gain, loss, and interference effects, enabling the design of systems with tailored spectral properties and unconventional wave dynamics. For instance, the study of PT-symmetric systems has demonstrated that balanced gain and loss can lead to entirely real spectra, despite the non-Hermitian nature of the Hamiltonian. Moreover, the concept of exceptional points—degeneracies where eigenvalues and eigenvectors coalesce—has provided a powerful framework for understanding sensitivity enhancement, topological energy transfer, and non-Hermitian phase transitions.

This special topic aims to highlight the latest research progress and emerging trends in non-Hermitian physics, covering both theoretical developments and experimental breakthroughs. Key areas of interest include non-Hermitian topological insulators, non-Hermitian skin effects, non-Hermitian quantum sensing, and the interplay between non-Hermiticity and nonlinearity. Additionally, the topic will explore the role of non-Hermitian physics in photonic and atomic systems, where synthetic gain and loss can be precisely engineered to realize exotic states of matter and novel functionalities.

By bringing together cutting-edge contributions from leading researchers, this special topic will provide a comprehensive overview of the field, fostering further exploration of the rich and complex phenomena arising in non-Hermitian systems. It will also highlight the potential of non-Hermitian physics to revolutionize technologies in quantum computing, sensing, and wave manipulation, paving the way for future innovations.

We warmly invite theoretical and experimental research groups, as well as individual authors, to submit topical reviews, perspective articles or original research articles to the special issue. While there are no strict length restrictions for articles, reviews should have a minimum length of 15 pages. Publication fees will be waived for all contributors, and all articles published online will be freely available for download.

We look forward to receiving your submission.

Sincerely,

Peng Xue, Beijing Computational Science Research Center, E-mail: bgnep.eux@gmail.com

Lan Yang, Washington University, E-mail: yang@seas.wustl.edu

Wu-Ming Liu, Institute of Physics CAS, E-mail: wmliu@iphy.ac.cn