157 citations · 610 across the 33 of their papers we have counts for
34 papers
Layer-Asymmetry-Induced Topological Superconductivity in High-T Bilayer Nickelates
Zhongyi Zhang, Congcong Le, Hoi Chun Po +3
The recent discovery of high-T superconductivity in bilayer nickelates has highlighted the crucial role of interlayer coupling and motivated proposals for dominant interlayer p…
Annular Majorana mode in a superconducting topological insulator
Shengshan Qin, Chi Wu, Lun-hui Hu +2
When the surface states of a topological insulator becomes superconducting, topological superconductivity can be obtained, and each vortex on the surface can host one single Majora…
Discovery of a nonsymmorphic superconductor with spontaneous rotational symmetry breaking and nontrivial zero modes
Hui Guo, Zhixuan Li, Senhao Lv +13
Topological superconductivity has attracted great interest due to its fundamental significance for realizing Majorana quasiparticles and fault-tolerant quantum computation. Nonsymm…
Interband pairing as the origin of the sublattice dichotomy in monolayer FeSe/SrTiO_3
Zhipeng Xu, Shengshan Qin, Kun Jiang +1
Sublattice dichotomy in monolayer FeSe/SrTiO, signaling the breaking of symmetries exchanging the two Fe sublattices, has recently been reported. We propose that interband pair…
Interband-Pairing-Boosted Supercurrent Diode Effect in Multiband Superconductors
Jiong Mei, Shengshan Qin, Jiangping Hu
We unveil a mechanism that enables a robust supercurrent diode effect in Josephson junctions based on multiband superconductors. We predict that interband pairing can significantly…
Double Majorana Vortex Flat Bands in the Topological Dirac Superconductor
Zhongyi Zhang, Zixi Fang, Shengshan Qin +3
Vortex lines, known as topological defects, are cable of trapping Majorana modes in superconducting topological materials. Previous studies have primarily focused on topological ba…
Observation of Majorana zero modes emerged from topological Dirac semimetal states under uniaxial strain
Quanxin Hu, Shengshan Qin, Yi Peng +12
The topological properties observed in iron-based superconductors extend our understanding of vortex Majorana quasiparticle excitations in unexpected ways. Vortex Majorana physics…
Inversion-symmetric Electron Gases as New Platforms for Topological Planar Josephson Junctions
Jiong Mei, Kun Jiang, Shengshan Qin +1
Intrinsic Rashba spin-orbital coupling (SOC) can exist in centrosymmetric materials with local inversion symmetry breaking. Here we show that such a SOC can induce topological supe…
Diversified Ruderman-Kittel-Kasuya-Yosida Interactions in a Nonsymmorphic Crystal
Zhongyi Zhang, Shengshan Qin, Chen Fang +2
We show that there are diversified Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions between magnetic impurities, mediated by itinerant electrons, in a centrosymmetric crystal resp…
Spin-triplet Superconductivity in Nonsymmorphic crystals
Shengshan Qin, Chen Fang, Fu-chun Zhang +1
Spin-triplet superconductivity is known to be a rare quantum phenomenon. Here we show that nonsymmorphic crystalline symmetries can dramatically assist spin-triplet superconductivi…
Topological Superconductivity from Unconventional Band Degeneracy with Conventional Pairing
Zhongyi Zhang, Zhenfei Wu, Chen Fang +4
We present a new scheme for Majorana modes in systems with nonsymmporhic-symmetry-protected band degeneracy. We reveal that when the gapless fermionic excitations are encoded with…
Identifying -wave pairing symmetry in single-layer FeSe from topologically trivial edge states
Zhongxu Wei, Shengshan Qin, Cui Ding +4
Determining the pairing symmetry of single-layer FeSe on SrTiO is the key to understanding the enhanced pairing mechanism; furthermore, it guides exploring new superconductors…
Theory of Topological Superconductivity in Doped IV-VI Semiconductors
Zhe Li, Shengshan Qin, Jie Ren +3
We theoretically study potential unconventional superconductivity in doped AB-type IV-VI semi-conductors, based on a minimal effective model with interaction up to the next-nearest…
Topological Superconductivity in an s-wave Superconductor and Its Implication to Iron-based Superconductors
Shengshan Qin, Chen Fang, Fu-Chun Zhang +1
In the presence of both space and time reversal symmetries, an s-wave A1g superconducting state is usually topologically trivial. Here we demonstrate that an exception can take pla…
Gapless vortex bound states in superconducting topological semimetals
Yi Zhang, Shengshan Qin, Kun Jiang +1
We find that the vortex bound states in superconducting topological semimetals are gapless owing to topological massless excitations in their normal states. We demonstrate this uni…
Reemergence of superconductivity in pressurized quasi-one-dimensional superconductor K2Mo3As3
Cheng Huang, Jing Guo, Kang Zhao +13
Here we report a pressure-induced reemergence of superconductivity in recently discovered superconductor K2Mo3As3, which is the first experimental case observed in quasi-one-dimens…
Topological Phase Transitions of Superconducting Vortex Bound States Driven by Impurities
Shengshan Qin, Chen Fang, Fu-chun Zhang +1
We show that standard impurities, magnetic or nonmagnetic, weak or strong, can cause topological phase transitions inside the vortex cores of a conventional s-wave superconductor.…
Electronic structure and two-band superconductivity in unconventional high- cuprates BaCuO
Kun Jiang, Congcong Le, Yinxiang Li +4
The recently discovered cuprate superconductor BaCuO exhibits a high K at . The polycrystal grown under high pressure has a structure similar t…
Topological superconductivity in Ni-based transition-metal trichalcogenide superconductors
Yinxiang Li, Xianxin Wu, Yuhao Gu +4
Based on a two-orbital honeycomb lattice model and random phase approximation, we investigate the pairing symmetry of the Ni-based transition-metal trichalcogenide. We find that an…
Quasi 1D topological nodal vortex line phase in doped superconducting 3D Dirac Semimetals
Shengshan Qin, Lunhui Hu, Congcong Le +4
We study the vortex bound states in three dimensional (3D) superconducting Dirac semimetals with time reversal symmetry. Assuming two Dirac points on the kz-axis and bulk s-wave su…
Topological Vortex Phase Transitions in Iron-Based Superconductors
Shengshan Qin, Lunhui Hu, Xianxin Wu +4
We study topological vortex phases in iron-based superconductors. Besides the previously known vortex end Majorana zero modes (MZMs) phase stemming from the existence of a three di…
Topological Critical Materials of Ternary Compounds
Shengshan Qin, Congcong Le, Xianxin Wu +1
We review topological properties of two series of ternary compounds AMgBi (A=K, RB, Cs) and ABC with a hexagonal ZrBeSi type structure. The first series of materials AMgBi are pred…
-CuI: a Dirac semimetal without surface Fermi arcs
Congcong Le, Xianxin Wu, Shengshan Qin +4
Anomalous surface states with Fermi arcs are commonly considered to be a fingerprint of Dirac semimetals (DSMs). In contrast to Weyl semimetals, however, Fermi arcs of DSMs are not…
i-Josephson Junction as Topological Superconductor
Zhesen Yang, Shengshan Qin, Qiang Zhang +2
We show that the time reversal symmetry inevitably breaks in a superconducting Josephson junction formed by two superconductors with different pairing symmetries dubbed as i-Joseph…