1.4k citations · 4.1k across the 22 of their papers we have counts for
22 papers
Where to find lossless metals?
Xiaolei Hu, Zhengran Wu, Zhilin Li +5
Hypothetical metals having optical absorption losses as low as those of the transparent insulators, if found, could revolutionize optoelectronics. We perform the first high-through…
Edge states in a non-Hermitian topological crystalline insulator
Qiu-Yue Xu, Feng Liu, Chui-Zhen Chen +1
Breaking Hermiticity in topological systems gives rise to intriguing phenomena, such as the exceptional topology and the non-Hermitian skin effect. In this work, we study a non-Her…
Identification of chirality of chiral multifold fermions in anti-crystals
Yan Sun, Qiunan Xu, Yang Zhang +2
The chirality of chiral multifold fermions in reciprocal space is related to the chirality of the crystal lattice structure in real space. In this work, we propose a strategy to de…
Comprehensive scan for nonmagnetic Weyl semimetals with nonlinear optical response
Qiunan Xu, Yang Zhang, Klaus Koepernik +4
As the development of topological band theory, comprehensive databases about time reversal and crystalline symmetries protected nonmagnetic topological materials were developed via…
Spin-orbitronic materials with record spin-charge conversion from high-throughput ab initio calculations
Yang Zhang, Qiunan Xu, Klaus Koepernik +5
The spin Hall effect (SHE) is an important spintronics phenomenon, which allows transforming a charge current into a spin current and vice versa without the use of magnetic materia…
Signatures for half-metallicity and nontrivial surface states in a Kagome-lattice magnetic Weyl semimetal CoSnS
Lin Jiao, Qiunan Xu, Yeryun Cheon +4
Weyl semimetals with time reversal symmetry breaking are expected to show various fascinating physical behaviors, such as intrinsic giant anomalous Hall effect, chiral anomaly effe…
Surface states in bulk single crystal of topological semimetal CoSnS towards water oxidation
Guowei Li, Qiunan Xu, Wujun Shi +16
The band inversion in topological phase matters bring exotic physical properties such as the emergence of a topologically protected surface states. They strongly influence the surf…
Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
Noam Morali, Rajib Batabyal, Pranab Kumar Nag +7
Bulk-surface correspondence in Weyl semimetals assures the formation of topological "Fermi-arc" surface bands whose existence is guaranteed by bulk Weyl nodes. By investigating thr…
Large anomalous Hall and Nernst effect from nodal line symmetry breaking in FeMnX (X=P,As,Sb)
Jonathan Noky, Claudia Felser, Yan Sun
A large Berry curvature in the vicinity of the Fermi energy is required in order to obtain a large anomalous Hall and Nernst effect. This Berry curvature can be induced by Weyl poi…
Topological insulators vs. topological Dirac semimetals in honeycomb compounds
Xiuwen Zhang, Qihang Liu, Qiunan Xu +2
Intriguing physical property of materials stems from their chemical constituent whereas the connection between them is often not clear. Here, we uncover a general chemical classifi…
Strong spin-Hall and Nernst effects in a p-band semimetal
Yang Zhang, Qiunan Xu, Klaus Koepernik +4
Since spin currents can be generated, detected, and manipulated via the spin Hall effect (SHE), the design of strong SHE materials has become a focus in the field of spintronics. B…
Observation of Landau quantization and standing waves in HfSiS
L. Jiao, Q. N. Xu, Y. P. Qi +4
Recently, HfSiS was found to be a new type of Dirac semimetal with a line of Dirac nodes in the band structure. Meanwhile, Rashba-split surface states are also pronounced in this c…
Visualization of electronic topology in ZrSiSe by scanning tunneling microscopy
Kunliang Bu, Ying Fei, Wenhao Zhang +8
As emerging topological nodal-line semimetals, the family of ZrSiX (X = O, S, Se, Te) has attracted broad interests in condensed matter physics due to their future applications in…
Topological surface Fermi arcs in the magnetic Weyl semimetal CoSnS
Qiunan Xu, Enke Liu, Wujun Shi +4
Very recently, the half-metallic compound CoSnS was predicted to be a magnetic WSM with Weyl points only 60 meV above the Fermi level (). Owing to the low charge c…
Magnetic Weyl Semimetal in Quasi Two-dimensional Half Metallic CoSnSe
Qiunan Xu, Enke Liu, Wujun Shi +3
We have found a ferromagnetic Weyl semimetal (WSM) in half metallic CoSnSe. The three pairs of Weyl points near Fermi level (E) are derived from nodal lines gapped…
Emerging chiral edge states from the confinement of a magnetic Weyl semimetal in CoSnS
Lukas Muechler, Enke Liu, Jacob Gayles +3
The quantum anomalous Hall effect (QAHE) and magnetic Weyl semimetals (WSMs) are topological states induced by intrinsic magnetic moments and spin-orbit coupling. Their similarity…
Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
Enke Liu, Yan Sun, Nitesh Kumar +19
Magnetic Weyl semimetals with broken time-reversal symmetry are expected to generate strong intrinsic anomalous Hall effects, due to their large Berry curvature. Here, we report a…
Evidence of topological insulator state in the semimetal LaBi
R. Lou, B. -B. Fu, Q. N. Xu +17
By employing angle-resolved photoemission spectroscopy combined with first-principles calculations, we performed a systematic investigation on the electronic structure of LaBi, whi…
Topological Nodal Line Semimetals in CaP3 family of materials
Qiunan Xu, Rui Yu, Zhong Fang +2
We propose that CaP3 family of materials, which include CaP3, CaAs3, SrP3, SrAs3 and BaAs3 can host a three-dimensional topological nodal line semimetal states. Based on first-prin…
Topologically entangled Rashba-split Shockley states on the surface of grey arsenic
Peng Zhang, J. -Z. Ma, Y. Ishida +13
We discover a pair of spin-polarized surface bands on the (111) face of grey arsenic by using angle-resolved photoemission spectroscopy (ARPES). In the occupied side, the pair rese…
Two-Dimensional Oxide Topological Insulator With Iron-Pnictide Superconductor LiFeAs Structure
Qiunan Xu, Zhida Song, Simin Nie +3
By using first-principles calculations, we propose that ZrSiO can be looked as a three-dimensional (3D) oxide weak topological insulator (TI) and its single layer is a long-sought-…
Topological Node-Line Semimetal in Three Dimensional Graphene Networks
Hongming Weng, Yunye Liang, Qiunan Xu +4
Graphene, a two dimensional (2D) carbon sheet, acquires many of its amazing properties from the Dirac point nature of its electronic structures with negligible spin-orbit coupling.…