287 citations · 1.3k across the 25 of their papers we have counts for
25 papers
Nonreciprocal Superconducting Transport from Chiral Edge States
Jin-Xing Hou, Yan-Song Song, James Jun He +1
Nonreciprocal superconducting transport enables dissipationless rectification and has attracted considerable interest, yet its microscopic origin is typically sought in bulk electr…
Strong Correlation Drives Zero-Field Josephson Diode Effect
Yiheng Sun, Zhenyu Zhang, James Jun He
The supercurrent diode effect (SDE), characterized by unequal critical currents in opposite directions, has been observed with or without magnetic fields, yet mechanisms enabling z…
Directional-dependent Berezinskii-Kosterlitz-Thouless transition at EuO/KTaO(111) interfaces
Zongyao Huang, Zhengjie Wang, Xiangyu Hua +10
In two dimensions, a phase-coherent superconducting state is established via a Berezinskii-Kosterlitz-Thouless (BKT) transition, whose critical temperature is determi…
Dual-mode superconducting diode effect enabled by in-plane and out-of-plane magnetic field
Chengyu Yan, Huai Guan, Zhenyu Zhang +6
The discovery of the superconducting diode effect (SDE) has been cherished as a milestone in developing superconducting electronics. Tremendous efforts are being dedicated to reali…
Optical response of edge modes in time-reversal symmetric topological superconductors
Hirokazu Kobayashi, Han Bi, James Jun He +1
Topological superconductors and Majorana edge modes at their boundaries have been theoretically predicted. However, their experimental observation remains controversial. Recent the…
Spin Signature of Majorana Fermions in Topological Nodal-Point Superconductors
Junjie Zeng, James Jun He, Zhen Ning +2
In two-dimensional topological nodal superconductors, Majorana edge states have been conventionally believed to exhibit only spin-triplet pairing correlations. However, we reveal a…
Inter-band optical transitions of helical Majorana edge modes in topological superconductors
Han Bi, James Jun He
The search for evidence of Majorana states on the edges of topological superconductors (TSCs) is challenging due to the difficulty of detecting such charge-neutral electronic quasi…
The supercurrent diode effect and nonreciprocal paraconductivity due to the chiral structure of nanotubes
James Jun He, Yukio Tanaka, Naoto Nagaosa
The research interest in the supercurrent diode effect (SDE) has been growing. It has been found in various kinds of systems, in a large part of which it may be understood by combi…
Local Raman Spectroscopy of Chiral Majorana Edge Modes in Kitaev Spin Liquids and Topological Superconductors
James Jun He, Naoto Nagaosa
The Raman scattering with local optical excitation from the Majorana edge modes of Kitaev spin liquids and topological superconductors is studied theoretically. Although the effect…
Optical Responses of Chiral Majorana Edge States in Two-Dimensional Topological Superconductors
James Jun He, Yukio Tanaka, Naoto Nagaosa
Majorana fermions exist on the boundaries of two-dimensional topological superconductors (TSCs) as charge-neutral quasi-particles. The neutrality makes the detection of such states…
A phenomenological theory of superconductor diodes
James Jun He, Yukio Tanaka, Naoto Nagaosa
We study theoretically the superconductor diodes, where the magnitude of the critical current changes as the direction is reversed, in terms of a generalized Ginzburg-Landau model…
Higher-Order Weyl-Exceptional-Ring Semimetals
Tao Liu, James Jun He, Zhongmin Yang +1
For first-order topological semimetals, non-Hermitian perturbations can drive the Weyl nodes into Weyl exceptional rings having multiple topological structures and no Hermitian cou…
Superconductivity beyond Pauli's limit in bulk NbS2: Evidence for the Fulde-Ferrell-Larkin-Ovchinnikov state
Chang-woo Cho, Jian Lyu, Cheuk Yin Ng +4
We present magnetic torque, specific heat and thermal expansion measurements combined with a piezo rotary positioner of the bulk transition metal dichalcogenide (TMD) superconducto…
Non-Hermitian topological Mott insulators in one-dimensional fermionic superlattices
Tao Liu, James Jun He, Tsuneya Yoshida +2
We study interaction-induced Mott insulators, and their topological properties in a 1D non-Hermitian strongly-correlated spinful fermionic superlattice system with either nonrecipr…
Platform of chiral Majorana edge modes and its quantum transport phenomena
James Jun He, Tian Liang, Yukio Tanaka +1
We propose a method to create two-dimensional topological superconductors with a heterostructure of ferromagnet (FM), topological insulator (TI) thin film and superconductor, in wh…
Spin supercurrent in two-dimensional superconductors with Rashba spin-orbit interaction
James Jun He, Kanta Hiroki, Keita Hamamoto +1
Spin current is a central theme in spintronics, and its generation is a keen issue. The spin-polarized current injection from the ferromagnet, spin battery, and spin Hall effect ha…
Emergent Josephson current of chiral topological superconductor in quantum anomalous Hall insulator/superconductor heterostructures
Chui-Zhen Chen, James Jun He, Dong-Hui Xu +1
Recently, a quantum anomalous Hall insulator (QAHI)/superconductor heterostructure has been realized and shows half-quantized conductance plateaus in two-terminal conductance measu…
Majorana corner states in a two-dimensional magnetic topological insulator on a high-temperature superconductor
Tao Liu, James Jun He, Franco Nori
Conventional -dimensional topological superconductors (TSCs) have protected gapless -dimensional boundary states. In contrast to this, second-order TSCs are characteriz…
Asymmetric Josephson Effect in Inversion Symmetry Breaking Topological Materials
Chui-Zhen Chen, James Jun He, Mazhar Ali +3
Topological materials which possess topologically protected surface states have attracted much attention in recent years. In this work, we study the critical current of superconduc…
Effects of Domain Walls in Quantum Anomalous Hall Insulator/Superconductor Heterostructures
Chui-Zhen Chen, James Jun He, Dong-Hui Xu +1
In a recent experiment, half-quantized longitudinal conductance plateaus (HQCPs) of height have been observed in quantum anomalous Hall (QAH) insulator/superconduc…
Magnetic Field Driven Nodal Topological Superconductivity in Monolayer Transition Metal Dichalcogenides
Wen-Yu He, Benjamin T. Zhou, James J. He +3
Recently, Ising superconductors which possess in-plane upper critical fields much larger than the Pauli limit field are under intense experimental study. Many monolayer or few laye…
Generating Giant Spin Currents Using Nodal Topological Superconductors
Noah F. Q. Yuan, Yao Lu, James J. He +1
In this work, we show that a giant spin current can be injected into a nodal topological superconductor, using a normal paramagnetic lead, through a large number of zero energy Maj…
Demonstrating Lattice-Symmetry-Protection in Topological Crystalline Superconductors
Xiong-Jun Liu, James J. He, K. T. Law
We propose to study the lattice-symmetry protection of Majorana zero bound modes in topological crystalline superconductors (SCs). With an induced -wave superconductivity in the…
Selective Equal-Spin Andreev Reflections Induced by Majorana Fermions
James J. He, T. K. Ng, Patrick A. Lee +1
In this work, we find that Majorana fermions induce selective equal spin Andreev reflections (SESARs), in which incoming electrons with certain spin polarization in the lead are re…