Haiwen Liu

Evolution from Landau Quantization to Discrete Scale Invariance Revealed by Quantum Oscillations in Topological Materials

Jiayi Yang, Nannan Tang, Yunxing Li, Jiawei Luo et autres

Dirac materials have been a unique solid state platform for exploring relativistic quantum phenomena including supercritical atomic collapse, which leads to emergent discrete scale symmetry and logperiodic quantum oscillations. In the relativistic regime, the fundamental effect in quantum electrodynamics, vacuum polarization, can …

Evolution from Landau Quantization to Discrete Scale Invariance Revealed by Quantum Oscillations in Topological Materials

Jiayi Yang, Nannan Tang, Yunxing Li, Jiawei Luo et autres

Dirac materials have been a unique solid state platform for exploring relativistic quantum phenomena including supercritical atomic collapse, which leads to emergent discrete scale symmetry and logperiodic quantum oscillations. In the relativistic regime, the fundamental effect in quantum electrodynamics, vacuum polarization, can …

Emergent quantum phenomena via phase-coherence engineering in infinite-layer nickelate superconductors

Haoran Ji, Zheyuan Xie, Xiaofang Fu, Zihan Cui et autres

Dimensionality of a physical system, conventionally an invariant geometric characteristic, fundamentally governs the universality class of phase transitions and the landscape of emergent collective phenomena. In low-dimensional or layered high-temperature superconductors, the macroscopic phase coherence of superconducting orders is typically confined in …

Emergent quantum phenomena via phase-coherence engineering in infinite-layer nickelate superconductors

Haoran Ji, Zheyuan Xie, Xiaofang Fu, Zihan Cui et autres

Dimensionality of a physical system, conventionally an invariant geometric characteristic, fundamentally governs the universality class of phase transitions and the landscape of emergent collective phenomena. In low-dimensional or layered high-temperature superconductors, the macroscopic phase coherence of superconducting orders is typically confined in …

Anisotropic Upper Critical Field beyond the Pauli Limit in a Nickelate Superconductor: Evidence for a Quantum Fluctuation Driven State

Xueyan Wang, Cheng-Xue Chen, Zi-Ming Mai, Qiang Zhao et autres

Superconductivity can be destroyed by a magnetic field with an upper bound known as the Pauli limit. Here, we report a large violation of the Pauli limit in both in-plane and perpendicular magnetic fields in La_{0.8}Sr_{0.2}NiO_{2} infinite-layer superconducting thin films. The critical …

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Orbital-effect-induced finite-momentum pairing and Josephson vortex lattice melting in layered Ising superconductors

Hongyi Yan, Haiwen Liu, Yi Liu, Ding Zhang et autres

The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is a fascinating superconducting phase characterized by a spatially modulated order parameter that occurs in unconventional superconductors under strong magnetic fields. In this study, we explore the impact of in-plane magnetic fields on the superconducting state in layered …

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