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Extraordinary Lifetime Enhancement of Coherent Phonon-Amplitude Modes in the Excitonic Insulator Phase of Ta2Pd3Te5
Anjan Kumar N M, Shuhan Wang, Snehashish Chatterjee +9
The excitonic insulator (EI) is an electronic phase of condensed excitons. However, in many prototypical materials the presence of a concurrent structural transition complicates th…
Pomeranchuk Instability Induced by an Emergent Higher-Order van Hove Singularity on the Distorted Kagome Surface of CoSnS
Pranab Kumar Nag, Rajib Batabyal, Julian Ingham +11
Materials hosting flat bands at the vicinity of the Fermi level promote exotic symmetry broken states. Common to many of these are van Hove singularities at saddle points of the di…
Quantized nonlinear Hall effect from chiral monopole
Nikolai Peshcherenko, Claudia Felser, Yang Zhang
Nonlinear Hall effect arises in materials without inversion symmetry, and the intrinsic contribution is typically from Berry curvature dipole of non-universal Fermi pockets. Here w…
Transfer learning relaxation, electronic structure and continuum model for twisted bilayer MoTe
Ning Mao, Cheng Xu, Jiangxu Li +6
Large-scale moiré systems are extraordinarily sensitive, with even minute atomic shifts leading to significant changes in electronic structures. Here, we investigate the lattice re…
Distinct switching of chiral transport in the kagome metals KVSb and CsVSb
Chunyu Guo, Maarten R. van Delft, Martin Gutierrez-Amigo +10
The kagome metals AVSb (A=K,Rb,Cs) present an ideal sandbox to study the interrelation between multiple coexisting correlated phases such as charge order and superconductiv…
Kagome Materials I: SG 191, ScVSn. Flat Phonon Soft Modes and Unconventional CDW Formation: Microscopic and Effective Theory
Haoyu Hu, Yi Jiang, Dumitru Călugăru +6
Kagome Materials with flat bands exhibit wildly different physical properties depending on symmetry group, and electron number. For the case of ScVSn in space group 191, we…