98 citations · 275 across the 19 of their papers we have counts for
20 papers
Quantum Metric Induced Critical Current Anomaly in Flat Band Josephson Junctions
Zhong C. F. Li, Yuxuan Deng, Dmitri K. Efetov +1
In well-established theories of Josephson junctions, the superconducting critical current \( I_\mathrm{c} \) increases as the normal state conductance \( \mathcal{G} \) increases.…
Quantum Metric Localization and Quantum Metric Protection
Wen-Bo Dai, Jinchao Zhao, Shuai A. Chen +1
The study of disorder effects in electronic systems is one of the central themes in physics. It is well established that in the Anderson localization regime, the localization lengt…
Quantum-Geometric Fingerprints of Altermagnetic Order in Planar Magnetotransport
Zhichun Ouyang, Wei-Jing Dai, Zi-Ting Sun +2
Identifying altermagnetic order through transport requires signatures that are sensitive to magnetic symmetry but do not rely on a net magnetization. Here we show that planar magne…
Unconventional Josephson effects in {\it PT}-symmetric antiferromagnetic bilayers
Jin-Xin Hu, Mengli Hu, Ying-Ming Xie +1
We propose that unconventional Josephson effects can typically emerge in {\it PT}-symmetric antiferromagnetic (AFM) bilayer systems. When proximitized by a conventional superconduc…
Layer Pseudospin Superconductivity in Twisted MoTe
Jin-Xin Hu, Akito Daido, Zi-Ting Sun +2
Recent experiments have observed signatures of spin-valley-polarized unconventional superconductivity in twisted bilayer MoTe (tMoTe). Here, we explore the rich physics of…
Topological Fermi-arc-like surface states in Kramers nodal line metals
Zi-Ting Sun, Ruo-Peng Yu, Xue-Jian Gao +1
The discovery of Kramers nodal line metals (KNLMs) and Kramers Weyl semimetals (KWSs) has significantly expanded the range of metallic topological materials to all noncentrosymmetr…
Topological altermagnetic Josephson junctions
Grant Z. X. Yang, Zi-Ting Sun, Ying-Ming Xie +1
Planar Josephson junctions are pivotal for engineering topological superconductivity, yet are severely hindered by orbital effects induced by in-plane magnetic fields. In this work…
Asynchronous mass inversion enriched quantum anomalous Hall states in multilayer graphene
Xilin Feng, Zi-Ting Sun, K. T. Law
Recently, multilayer graphene systems have attracted significant attention due to the discovery of a variety of intriguing phases, particularly quantum anomalous Hall (QAH) states.…
Pseudo-spin-polarized topological superconductivity in kagome RbVSb
Xilin Feng, Zi-Ting Sun, Ben-Chuan Lin +1
Kagome superconductors AVSb (A=K, Rb, Cs) have sparked considerable interest due to the presence of several intertwined symmetry-breaking phases within a single material. I…
Pseudo-Ising superconductivity induced by -wave magnetism
Zi-Ting Sun, Xilin Feng, Ying-Ming Xie +3
Unconventional magnetic orders usually interplay with superconductivity in intriguing ways. Here we propose that a conventional superconductor in proximity to a compensated -wav…
Disorder-induced diffusion transport in flat-band systems with quantum metric
Chun Wang Chau, Tian Xiang, Shuai A. Chen +1
Our previous understanding of transport in disordered system depends on the assumption that there is a well-defined Fermi velocity. The Fermi velocity determines important length s…
Flat-band Fulde-Ferrell-Larkin-Ovchinnikov State from Quantum Geometric Discrepancy
Zi-Ting Sun, Ruo-Peng Yu, Shuai A. Chen +2
We propose a new scheme for realizing Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) Cooper pairing states within flat bands, in contrast to the conventional paradigm such as the Zeeman e…
Superconductivity from Quasiparticle Pairing of Intervalley Coherent State in Rhombohedral Trilayer Graphene
Chun Wang Chau, Shuai A. Chen, K. T. Law
Superconductivity is observed in rhombohedral trilayer graphene in a narrow regime between the flavor-symmetric state and the symmetry breaking phase, which cannot be described by…
Flat Band Josephson Junctions with Quantum Metric
Zhong C. F. Li, Yuxuan Deng, Shuai A. Chen +2
In this work, we consider superconductor/flat band material/superconductor (S/FB/S) Josephson junctions (JJs) where the flat band material possesses isolated flat bands with exactl…
Geometric and conventional contributions of superconducting diode effect: Application to flat-band systems
Jin-Xin Hu, Shuai A. Chen, K. T. Law
Nonreciprocal critical supercurrents give rise to the superconducting diode effect (SDE) in noncentrosymmetric superconductors when time-reversal symmetry is broken. In this paper,…
Anomalous periodicity and Majorana zero modes in chiral Josephson junctions
Zi-Ting Sun, Jin-Xin Hu, Ying-Ming Xie +1
Recent experiments reported that quantum Hall chiral edge state-mediated Josephson junctions (chiral Josephson junctions) could exhibit Fraunhofer oscillations with a periodicity o…
Quantum geometry quadrupole-induced third-order nonlinear transport in antiferromagnetic topological insulator MnBi2Te4
Hui Li, Chengping Zhang, Chengjie Zhou +7
The study of quantum geometry effects in materials has been one of the most important research directions in recent decades. The quantum geometry of a material is characterized by…
Josephson Diode Effect Induced by Valley Polarization in Twisted Bilayer Graphene
Jin-Xin Hu, Zi-Ting Sun, Ying-Ming Xie +1
Recently, the Josephson diode effect (JDE), in which the superconducting critical current magnitudes differ when the currents flow in opposite directions, has attracted great inter…
Orbital Fulde-Ferrell pairing state in moiré Ising superconductors
Ying-Ming Xie, K. T. Law
In this work, we study superconducting moiré homobilayer transition metal dichalcogenides where the Ising spin-orbit coupling (SOC) is much larger than the moiré bandwidth. We call…
Valley-Polarized Quantum Anomalous Hall State in Moiré MoTe/WSe Heterobilayers
Ying-Ming Xie, Cheng-Ping Zhang, Jin-Xin Hu +2
Moiré heterobilayer transition metal dichalcogenides (TMDs) emerge as an ideal system for simulating the single-band Hubbard model and interesting correlated phases have been obser…