292 citations · 1k across the 30 of their papers we have counts for
30 papers
The Locality Cost of Fully Flat Hopf Insulators
Feng Liu, Qifeng Liang, Wenlong Gao
Hopf topology permits a strictly finite-range Hamiltonian with one exactly flat topological band. We prove, however, that extending flatness to the complete two-band spectrum neces…
Band-Structure-Independent Topology from Nonsymmorphic Wannier Complexes
Qinghua He, Jie Zhang, Shengdan Tao +4
Nonsymmorphic symmetries can enforce band connectivity that obstructs a single-band Wannier description. We show that a fractional translation connecting distinct hig…
Shubnikov-de Haas Oscillations and Nontrivial Topological State in a New Weyl Semimetal Candidate SmAlSi
Longmeng Xu, Haoyu Niu, Yuming Bai +7
We perform the quantum magnetotransport measurements and first-principles calculations on high quality single crystals of SmAlSi, a new topological Weyl semimetal candidate. At low…
High-Pressure Crystal Growth, Superconducting Properties, and Electronic Band Structure of Nb2P5
Xiaolei Liu, Zhenhai Yu, Qifeng Liang +7
Orthorhombic (space group: Pnma) Nb2P5 is a high-pressure phase that is quenchable to ambient pressure, which could viewed as the zigzag infinite P chain-inserted NbP2. We report h…
Robust magnetoresistance in TaAs2 under pressure up to about 37 GPa
Hongyuan Wang, Cuiying Pei, Hao Su +13
The extremely large magnetoresistance (XMR) in nonmagnetic semimetals has inspired growing interest owing to both intriguing physics and potential applications. We report results o…
Quantum oscillations and nontrivial topological state in a compensated semimetal TaP2
Hongyuan Wang, Hao Su, Jiuyang Zhang +12
We report systematic magneto-transport measurements and ab initio calculations on single-crystalline TaP2, a new member of the transition-metal dipnictides. We observed unsaturated…
Exotic Node Line in ternary MgSrSi-type crystals
Jinling Lian, Lixian Yu, Qi-Feng Liang +3
Node line (NL) band-touchings protected by mirror symmetry (named as -NL), the product of inversion and time reversal symmetry (-NL), or nonsymmorphic symmet…
Critical Current Anomaly at the Topological Quantum Phase Transition in a Majorana Josephson Junction
Hong Huang, Qi-Feng Liang, Dao-Xin Yao +1
Majorana bound states in topological Josephson junctions induce a 4? period current-phase relation. Direct detection of the 4? periodicity is complicated by the quasiparticle poiso…
Majorana phi0 Junction in a Disordered Spin-orbit Coupling Nanowire with Tilted Magnetic Field
Hong Huang, Qifeng Liang, Daoxin Yao +1
Majorana Josephson junctions in nanowire systems exhibit a pseudo- period current-phase relation in the clean limit. In this work, we study how this current-phase relation resp…
Interaction-driven Quantum Anomalous Hall Effect in Halogenated Hematite Nanosheets
Qi-Feng Liang, Jian Zhou, Rui Yu +2
Based on first-principle calculations and model analysis, we show that the quantum anomalous Hall (QAH) insulating phase can be realized in the functionalized hematite (…
Transition between strong and weak topological insulator in ZrTe and HfTe
Zongjian Fan, Qi-Feng Liang, Y. B. Chen +2
ZrTe and HfTe have attracted increasingly attention recently since the theoretical prediction of being topological insulators (TIs). However, subsequent works show many con…
Landau-Zener-Stückelberg Interferometry for Majorana Qubit
Zhi Wang, Wen-Chao Huang, Qi-Feng Liang +1
Stimulated by a very recent experiment observing successfully two superconducting states with even- and odd-number of electrons in a nanowire topological superconductor as expected…
Quantum topological Hall effect and noncoplanar antiferromagnetism in KRhO
Jian Zhou, Qi-Feng Liang, Hongming Weng +5
Quantum anomalous Hall (QAH) phase is a two-dimensional bulk ferromagnetic insulator with a nonzero Chern number in presence of spin-orbit coupling (SOC) but absence of applied mag…
Node-Surface and Node-Line Fermions From Nonsymmorphic Lattice Symmetries
Qi-Feng Liang, Jian Zhou, Rui Yu +2
We propose a kind of novel topological quantum state of semimetals in a quasi-one-dimensional (1D) crystals BaMX (M = V, Nb or Ta; X = S or Se) family by using symmetry analysi…
Quantum Anomalous Hall Effect in a Perovskite and Inverse-Perovskite Sandwich Structure
Long-Hua Wu, Qi-Feng Liang, Xiao Hu
Based on first-principles calculations, we propose a sandwich structure composed of a G-type anti-ferromagnetic (AFM) Mott insulator LaCrO grown along the [001] direction with…
Manipulating the Majorana Qubit with the Landau-Zener-Stückelberg Interference
Wen-Chao Huang, Qi-Feng Liang, Dao-Xin Yao +1
Constructing a universal operation scheme for Majorana qubits remains a central issue for the topological quantum computation. We study the Landau-Zener-Stückelberg interference in…
Proposal for a flux qubit in a dc SQUID with the period Josephson effect
Wen-Chao Huang, Qi-Feng Liang, Dao-Xin Yao +1
Constructing qubits which are suitable for quantum computation remains a notable challenge. Here, we propose a superconducting flux qubit in a dc SQUID structure, formed by a conve…
Topological states of non-Dirac electrons on triangular lattice
Qi-Feng Liang, Rui Yu, Jian Zhou +1
We demonstrate the possibility of topological states for non-Dirac electrons. Specifically it is shown that, because of the crystal symmetry and time reversal symmetry,…
Viewing Majorana Bound States by Rabi Oscillations
Zhi Wang, Qi-Feng Liang, Dao-Xin Yao +1
Rabi oscillation is a pure quantum phenomenon where the system jumps forth and back between two quantum levels under stimulation of a microwave, and a resonance occurs when the ene…
Tunable Semimetallic State in Compressive-strained SrIrO3 Films Revealed by Transport Behaviors
Lunyong Zhang, Qifeng Liang, Ye Xiong +11
Orthorhombic SrIrO3 is a typical spin-orbit-coupling correlated metal that shows diversified physical properties under the external stimuli. Here nonlinear Hall effect and weakly t…
Fidelity in topological superconductors with end Majorana fermions
Zhi Wang, Qi-Feng Liang, Dao-Xin Yao
Fidelity and fidelity susceptibility are introduced to investigate the topological superconductors with end Majorana fermions. A general formalism is established to calculate the f…
Proposal for Manipulation of Majorana Fermions in Nano-Patterned Semiconductor-Superconductor Heterostructure
Long-Hua Wu, Qi-Feng Liang, Zhi Wang +1
We investigate a heterostructure system with a spin-orbit coupled semiconductor sandwiched by an s-wave superconductor and a ferromagnetic insulator, which supports Majorana fermio…
Topological Single Electron Pumping Assisted by Majorana Fermions
Qi-Feng Liang, Zhi Wang, Xiao Hu
Single electron pumping based on the topological property of Majorana fermions (MFs) is proposed. The setup consists of a quantum dot and four nano topological superconductors (TSs…
Electrically Tunable Topological State in [111] Perovskite Materials with Antiferromagnetic Exchange Field
Qi-Feng Liang, Long-Hua Wu, Xiao Hu
A topological state with simultaneous nonzero Chern number and spin Chern number is possible for electrons on honeycomb lattice based on band engineering by staggered electric pote…