Band gap renormalization, carrier mobilities, and the electron-phonon self-energy in crystalline naphthalene

Kavli Affiliate: Jeffrey B. Neaton | First 5 Authors: Florian Brown-Altvater, Gabriel Antonius, Tonatiuh Rangel, Matteo Giantomassi, Claudia Draxl | Summary: Organic molecular crystals are expected to feature appreciable electron-phonon interactions that influence their electronic properties at zero and finite temperature. In this work, we report first-principles calculations and an analysis of the electron-phonon self-energy […]


Continue.. Band gap renormalization, carrier mobilities, and the electron-phonon self-energy in crystalline naphthalene

Ultrafast dynamics of electron-phonon coupling in a metal

Kavli Affiliate: Alessandra Lanzara | First 5 Authors: Choongyu Hwang, Wentao Zhang, Koshi Kurashima, Robert Kaindl, Tadashi Adachi | Summary: In the past decade, the advent of time-resolved spectroscopic tools has provided a new ground to explore fundamental interactions in solids and to disentangle degrees of freedom whose coupling leads to broad structures in the […]


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Nanoscale axial position and orientation measurement of hexagonal boron nitride quantum emitters using a tunable nanophotonic environment

Kavli Affiliate: Harry A. Atwater | First 5 Authors: Pankaj K. Jha, Hamidreza Akbari, Yonghwi Kim, Souvik Biswas, Harry A. Atwater | Summary: Color centers in hexagonal boron nitride (hBN) have emerged as promising candidates for single-photon emitters (SPEs) due to their bright emission characteristics at room temperature. In contrast to mono- and few-layered hBN, […]


Continue.. Nanoscale axial position and orientation measurement of hexagonal boron nitride quantum emitters using a tunable nanophotonic environment

Kirigami-inspired inflatables with programmable shapes

Kavli Affiliate: Katia Bertoldi | First 5 Authors: Lishuai Jin, Antonio Elia Forte, Bolei Deng, Ahmad Rafsanjani, Katia Bertoldi | Summary: Kirigami, the Japanese art of paper cutting, has recently enabled the design of stretchable mechanical metamaterials that can be easily realized by embedding arrays of periodic cuts into an elastic sheet. Here, we exploit […]


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Solid-state ionic rectification in perovskite nanowire heterostructures

Kavli Affiliate: Peidong Yang | First 5 Authors: Qiao Kong, Amael Obliger, Minliang Lai, Mengyu Gao, David T. Limmer | Summary: Halide perovskites have attracted increasing research attention regarding their outstanding optoelectronic applications. Owing to its low activation energy, ion migration is implicated in the long-term stability and many unusual transport behaviors of halide perovskite […]


Continue.. Solid-state ionic rectification in perovskite nanowire heterostructures

Solid-state ionic rectification in perovskite nanowire heterostructures

Kavli Affiliate: Peidong Yang | First 5 Authors: Qiao Kong, Amael Obliger, Minliang Lai, Mengyu Gao, David T. Limmer | Summary: Halide perovskites have attracted increasing research attention regarding their outstanding optoelectronic applications. Owing to its low activation energy, ion migration is implicated in the long-term stability and many unusual transport behaviors of halide perovskite […]


Continue.. Solid-state ionic rectification in perovskite nanowire heterostructures

Imaging moiré flat bands in 3D reconstructed WSe2/WS2 superlattices

Kavli Affiliate: Michael F. Crommie | First 5 Authors: Hongyuan Li, Shaowei Li, Mit H. Naik, Jingxu Xie, Xinyu Li | Summary: Moir’e superlattices in transition metal dichalcogenide (TMD) heterostructures can host novel correlated quantum phenomena due to the interplay of narrow moir’e flat bands and strong, long-range Coulomb interactions1-5. However, microscopic knowledge of the […]


Continue.. Imaging moiré flat bands in 3D reconstructed WSe2/WS2 superlattices

Unknown I.I.D. Prophets: Better Bounds, Streaming Algorithms, and a New Impossibility

Kavli Affiliate: Felix Fischer | First 5 Authors: José Correa, Paul Dütting, Felix Fischer, Kevin Schewior, Bruno Ziliotto | Summary: A prophet inequality states, for some $alphain[0,1]$, that the expected value achievable by a gambler who sequentially observes random variables $X_1,dots,X_n$ and selects one of them is at least an $alpha$ fraction of the maximum […]


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Physics Successfully Implements Lagrange Multiplier Optimization

Kavli Affiliate: Eli Yablonovitch | First 5 Authors: Sri Krishna Vadlamani, Tianyao Patrick Xiao, Eli Yablonovitch, , | Summary: Optimization is a major part of human effort. While being mathematical, optimization is also built into physics. For example, physics has the principle of Least Action, the principle of Minimum Entropy Generation, and the Variational Principle. […]


Continue.. Physics Successfully Implements Lagrange Multiplier Optimization

Physics Successfully Implements Lagrange Multiplier Optimization

Kavli Affiliate: Eli Yablonovitch | First 5 Authors: Sri Krishna Vadlamani, Tianyao Patrick Xiao, Eli Yablonovitch, , | Summary: Optimization is a major part of human effort. While being mathematical, optimization is also built into physics. For example, physics has the principle of Least Action, the principle of Minimum Entropy Generation, and the Variational Principle. […]


Continue.. Physics Successfully Implements Lagrange Multiplier Optimization