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Evidence for Flat Band Dirac Superconductor Originating from Quantum Geometry
Haidong Tian, Shi Che, Tianyi Xu +7
In a flat band superconductor, the charge carriers' group velocity vF is extremely slow, quenching their kinetic energy. The emergence of superconductivity thus appears paradoxical…
Quantum cascade of new correlated phases in trigonally warped bilayer graphene
Anna M. Seiler, Fabian R. Geisenhof, Felix Winterer +5
Divergent density of states offers the unique opportunity to explore a wide variety of correlated electron physics. In the thinnest limit, this has been predicted and verified in t…
Room-temperature quantum spin Hall edge state in a higher-order topological insulator BiBr
Nana Shumiya, Md Shafayat Hossain, Jia-Xin Yin +24
Room-temperature realization of macroscopic quantum phenomena is one of the major pursuits in fundamental physics. The quantum spin Hall state, a topological quantum phenomenon tha…
Phonon Stability of Quantum Droplets in a dipolar Bose gases
Fan Zhang, Lan Yin
Stabilized by quantum fluctuations, dipolar Bose-Einstein condensates can form self-bound liquidlike droplets in the mean-field unstable regime. However in the Bogoliubov theory, s…
Acoustic Möbius insulators from projective symmetry
Tianzi Li, Juan Du, Qicheng Zhang +4
Symmetry plays a critical role in classifying phases of matter. This is exemplified by how crystalline symmetries enrich the topological classification of materials and enable unco…
Tunable quantum anomalous Hall octet driven by orbital magnetism in bilayer graphene
Fabian R. Geisenhof, Felix Winterer, Anna M. Seiler +4
The quantum anomalous Hall (QAH) effect - a macroscopic manifestation of chiral band topology at zero magnetic field - has only been experimentally realized by magnetic doping of t…
Room-Temperature Topological Phase Transition in Quasi-One-Dimensional Material BiI
Jianwei Huang, Sheng Li, Chiho Yoon +16
Quasi-one-dimensional (1D) materials provide a superior platform for characterizing and tuning topological phases for two reasons: i) existence for multiple cleavable surfaces that…
Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsVSb
Zuowei Liang, Xingyuan Hou, Fan Zhang +9
The transition-metal-based kagome metals provide a versatile platform for correlated topological phases hosting various electronic instabilities. While superconductivity is rare in…