Switchable moiré potentials in ferroelectric WTe2/WSe2 superlattices

Kavli Affiliate: Jie Shan | First 5 Authors: Kaifei Kang, Wenjin Zhao, Yihang Zeng, Kenji Watanabe, Takashi Taniguchi | Summary: Moir’e materials, with superlattice periodicity many times the atomic length scale, have enabled the studies of strong electronic correlations and band topology with unprecedented tunability. However, nonvolatile control of the moir’e potentials, which could allow […]


Continue.. Switchable moiré potentials in ferroelectric WTe2/WSe2 superlattices

Theory of Nb-Zr Alloy Superconductivity and First Experimental Demonstration for Superconducting Radio-Frequency Cavity Applications

Kavli Affiliate: David A. Muller | First 5 Authors: Nathan S. Sitaraman, Zeming Sun, Ben Francis, Ajinkya C. Hire, Thomas Oseroff | Summary: Niobium-zirconium (Nb-Zr) alloy is an old superconductor that is a promising new candidate for superconducting radio-frequency (SRF) cavity applications. Using density-functional and Eliashberg theories, we show that addition of Zr to a […]


Continue.. Theory of Nb-Zr Alloy Superconductivity and First Experimental Demonstration for Superconducting Radio-Frequency Cavity Applications

Atomic-scale mapping and quantification of local Ruddlesden-Popper phase variations

Kavli Affiliate: Darrell G. Schlom | First 5 Authors: Erin E. Fleck, Berit H. Goodge, Matthew R. Barone, Hari P. Nair, Nathaniel J. Schreiber | Summary: The Ruddlesden-Popper ($A_{n+1}B_{n}text{O}_{3n+1}$) compounds are a highly tunable class of materials whose functional properties can be dramatically impacted by their structural phase $n$. The negligible energetic differences associated with […]


Continue.. Atomic-scale mapping and quantification of local Ruddlesden-Popper phase variations

Valley-coherent quantum anomalous Hall state in AB-stacked MoTe2/WSe2 bilayers

Kavli Affiliate: Jie Shan | First 5 Authors: Zui Tao, Bowen Shen, Shengwei Jiang, Tingxin Li, Lizhong Li | Summary: Moir’e materials provide fertile ground for the correlated and topological quantum phenomena. Among them, the quantum anomalous Hall (QAH) effect, in which the Hall resistance is quantized even under zero magnetic field, is a direct […]


Continue.. Valley-coherent quantum anomalous Hall state in AB-stacked MoTe2/WSe2 bilayers

Real-time 3D analysis during electron tomography using tomviz

Kavli Affiliate: David Muller | First 5 Authors: Jonathan Schwartz, Chris Harris, Jacob Pietryga, Huihuo Zheng Prashant Kumar, Anastasia Visheratina | Summary: The demand for high-throughput electron tomography is rapidly increasing in biological and material sciences. However, this 3D imaging technique is computationally bottlenecked by alignment and reconstruction which runs from hours to days. We […]


Continue.. Real-time 3D analysis during electron tomography using tomviz

Realization of the Haldane Chern insulator in a moiré lattice

Kavli Affiliate: Jie Shan | First 5 Authors: Wenjin Zhao, Kaifei Kang, Lizhong Li, Charles Tschirhart, Evgeny Redekop | Summary: The Chern insulator displays a quantized Hall effect without Landau levels. In a landmark paper in 1988, Haldane showed that a Chern insulator could be realized through complex next-nearest-neighbor hopping in a honeycomb lattice. Despite […]


Continue.. Realization of the Haldane Chern insulator in a moiré lattice

Temperature Dependence of the Emission Spectrum of GaN Defect Single-Photon Emitters

Kavli Affiliate: Farhan Rana | First 5 Authors: Yifei Geng, Jialun Luo, Len van Deurzen, Huili, Xing | Summary: Single-photon emitters (SPEs) in technologically mature wide bandgap semiconductors are attractive for realizing integrated platforms for quantum applications. We investigate single-photon emitters in GaN. GaN hosts bright and stable single-photon emitters in the 600 nm to […]


Continue.. Temperature Dependence of the Emission Spectrum of GaN Defect Single-Photon Emitters

Identification of a Nematic Pair Density Wave State in Bi2Sr2CaCu2O8+x

Kavli Affiliate: J. C. Seamus Davis | First 5 Authors: Weijiong Chen, Wangping Ren, Niall Kennedy, M. H. Hamidian, S. Uchida | Summary: Electron-pair density wave (PDW) states are now an intense focus of research in the field of cuprate correlated superconductivity. PDWs exhibit periodically modulating superconductive electron pairing which can be visualized directly using […]


Continue.. Identification of a Nematic Pair Density Wave State in Bi2Sr2CaCu2O8+x