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Pressure-Driven Magneto-Topological Phase Transition in a magnetic Weyl semimetal
Qingqi Zeng, Hongyi Sun, Jianlei Shen +9
The co-occurrence of phase transitions with local and global order parameters, such as the entangled magnetization and topological invariant, is attractive but has been seldom real…
Temperature-driven reorganization of electronic order in CsVSb
Q. Stahl, D. Chen, T. Ritschel +3
We report a temperature dependent x-ray diffraction study of the electronic ordering instabilities in the kagome material CsVSb. Our measurements between 10 K and 120 K rev…
What's knot to like? Observation of a linked loop quantum state
Ilya Belopolski, Guoqing Chang, Tyler A. Cochran +22
Quantum phases can be classified by topological invariants, which take on discrete values capturing global information about the quantum state. Over the past decades, these invaria…
Giant intrinsic anomalous terahertz Faraday rotation in the magnetic Weyl semimetal CoMnGa at room temperature
Xingyue Han, Anastasios Markou, Jonathan Stensberg +3
We report measurement of terahertz anomalous Hall conductivity and Faraday rotation in the magnetic Weyl semimetal CoMnGa thin films as a function of the magnetic field, temper…
Spin-voltage-driven efficient terahertz spin currents from the magnetic Weyl semimetals CoMnGa and CoMnAl
Genaro Bierhance, Anastasios Markou, Oliver Gueckstock +7
Magnetic Weyl semimetals are an emerging material class that combines magnetic order and a topologically non-trivial band structure. Here, we study ultrafast optically driven spin…
Moiré metal for catalysis
Yang Zhang, Claudia Felser, Liang Fu
The search for highly efficient and low-cost catalysts based on earth abundant elements is one of the main driving forces in organic and inorganic chemistry. Current strategies for…
Probing magnetic anisotropy in Kagome antiferromagnetic MnGe with torque magnetometry
Yinshang Liu, Hong Xiao, Aobo Yu +6
We investigate the magnetic symmetry of the topological antiferromagnetic material MnGe by using torque measurements. Below the Neel temperature, detailed angle-dependent torqu…
Anomalous thermoelectric effects and quantum oscillations in the kagome metal CsVSb
Dong Chen, Bin He, Mengyu Yao +7
The kagome metal compounds VSb ( = K, Rb, and Cs) feature a wealth of phenomena including nontrivial band topology, charge density wave (CDW), and superconductivity.…
Obstructed surface states as the origin of catalytic activity in inorganic heterogeneous catalysts
Guowei Li, Yuanfeng Xu, Zhida Song +8
The discovery of new catalysts that are efficient, sustainable, and low-cost is a major research endeavor for many industrial chemical processes. This requires an understanding and…
Three-Dimensional Real Space Invariants, Obstructed Atomic Insulators and A New Principle for Active Catalytic Sites
Yuanfeng Xu, Luis Elcoro, Guowei Li +7
Topologically trivial insulators come in two kinds: atomic, where the Wannier charge centers (WCCs) are localized on the atoms, and obstructed atomic, where the WCCs are located aw…
Fully two-dimensional incommensurate charge modulation on the Pd-terminated polar surface of PdCoO2
Pengfei Kong, Guowei Li, Zhongzheng Yang +4
Here we use low-temperature scanning tunneling microscopy and spectroscopy to study the polar surfaces of PdCoO2. On the CoO2-terminated polar surface, we detect the quasiparticle…
Antiskyrmions and their electrical footprint in crystalline mesoscale structures of MnPtSn
Moritz Winter, Francisco J. T. Goncalves, Ivan Soldatov +17
Skyrmionic materials hold the potential for future information technologies, such as racetrack memories. Key to that advancement are systems that exhibit high tunability and scalab…
Giant anomalous Nernst signal in the antiferromagnet YbMnBi2
Yu Pan, Congcong Le, Bin He +6
Searching for a high anomalous Nernst effect (ANE) is crucial for thermoelectric energy conversion applications because the associated unique transverse geometry facilitates module…
Anisotropic Nodal-Line-Derived Large Anomalous Hall Conductivity in ZrMnP and HfMnP
Sukriti Singh, Jonathan Noky, Shaileyee Bhattacharya +5
The nontrivial band structure of semimetals has attracted substantial research attention in condensed matter physics and materials science in recent years owing to its intriguing p…
Generalized Design Principles for Hydrodynamic Electron Transport in Anisotropic Metals
Yaxian Wang, Georgios Varnavides, Polina Anikeeva +3
Interactions of charge carriers with lattice vibrations, or phonons, play a critical role in unconventional electronic transport of metals and semimetals. Recent observations of ph…
Helicoid-arc van Hove singularities in topological chiral crystals
Daniel S. Sanchez, Tyler A. Cochran, Ilya Belopolski +14
Van Hove singularity are electronic instabilities that lead to many fascinating interactions, such as superconductivity and charge-density waves. And despite much interest, the nex…
Quasi-symmetry protected topology in a semi-metal
Chunyu Guo, Lunhui Hu, Carsten Putzke +10
The crystal symmetry of a material dictates the type of topological band structures it may host, and therefore symmetry is the guiding principle to find topological materials. Here…
Layer Hall effect in a 2D topological Axion antiferromagnet
Anyuan Gao, Yu-Fei Liu, Chaowei Hu +33
While ferromagnets have been known and exploited for millennia, antiferromagnets (AFMs) were only discovered in the 1930s. The elusive nature indicates AFMs' unique properties: At…
Observation of a singular Weyl point surrounded by charged nodal walls in PtGa
J. -Z. Ma, Q. -S. Wu, M. Song +17
Constrained by the Nielsen-Ninomiya no-go theorem, in all so-far experimentally determined Weyl semimetals (WSMs) the Weyl points (WPs) always appear in pairs in the momentum space…
Dopant-segregation to grain boundaries controls electrical conductivity of n-type NbCo(Pt)Sn half-Heusler alloy mediating thermoelectric performance
Ting Luo, Federico Serrano-Sánchez, Hanna Bishara +12
Science-driven design of future thermoelectric materials requires a deep understanding of the fundamental relationships between microstructure and transport properties. Grain bound…
Thermodynamic and transport properties of semiconducting two-dimensional metal-organic kagomé lattices with disorder
Tanya Berry, Jennifer R. Morey, Kathryn E. Arpino +4
The kagomé lattice is a fruitful source of novel physical states of matter, including the quantum spin liquid and Dirac fermions. Here we report a structural, thermodynamic, and tr…
Three-dimensional quasi-quantized Hall insulator phase in SrSi2
Kaustuv Manna, Nitesh Kumar, Sumanta Chattopadhyay +15
In insulators, the longitudinal resistivity becomes infinitely large at zero temperature. For classic insulators, the Hall conductivity becomes zero at the same time. However, ther…
Large anomalous Hall effect in the kagome ferromagnet LiMnSn
Dong Chen, Congcong Le, Chenguang Fu +4
Kagome magnets are believed to have numerous exotic physical properties due to the possible interplay between lattice geometry, electron correlation and band topology. Here, we rep…
Large topological Hall effect in an easy-cone ferromagnet (Cr0.9B0.1)Te
Yangkun He, Johannes Kroder, Jacob Gayles +5
The Berry phase understanding of electronic properties has attracted special interest in condensed matter physics, leading to phenomena such as the anomalous Hall effect and the to…