Results 81 to 90 of about 4,112,115 (294)

Evidence for Itinerant Ferromagnetic Flat Bands Producing Large Transverse Responses

Advanced Materials, EarlyView.
Itinerant ferromagnetic flat bands are demonstrated in GdCo5 with a high Curie temperature of 940K, a stacked honeycomb–kagome lattice, through angle‐resolved photoemission spectroscopy and magneto‐thermoelectric measurements. These topological flat bands generate large Berry curvaturte, producing gigantic anomalous Nernst effect with record‐high ...
Susumu Minami, Yangming Wang, Seigo Souma, Hiroto Nakamura, Akito Sakai, Takumi Osumi, Hang Su, Hikaru Watanabe, Shun'ichiro Kurosawa, Rikuto Oiwa, Daisuke Nishio‐Hamane, Kosuke Nakayama, Takuya Nomoto, Ryotaro Arita, Takafumi Sato, Satoru Nakatsuji   +15 more
wiley   +1 more source

First Double Red Giant Algol System with Active Mass Transfer

The Astronomical Journal
Double red giant stars are very important for studies of the stability of mass transfer, common-envelope evolution, and the formation of double white dwarfs with short orbital periods.
Mikhail Yu. Kovalev, Hailiang Chen, Sufen Guo, Jiao Li, Hongwei Ge, Dengkai Jiang, Marina A. Burlak, Natalia P. Ikonnikova, Xuefei Chen, Zhanwen Han   +9 more
doaj   +1 more source

Characterization of red giant stars in the public Kepler data

, 2011
The first public release of long-cadence stellar photometric data collected by the NASA Kepler mission has now been made available. In this paper, we characterize the red giant (G-K) stars in this large sample in terms of their solar-like oscillations ...
Chaplin, William, Gilliland, RL, T. Kallinger, Li, J, Ibrahim, KA, Klaus, T.C., T. C. Klaus, Chaplin, W.J., Stello, D., W. J. Chaplin, Klaus, TC, de Ridder, J., R. L. Gilliland, Ibrahim, K.A., K. A. Ibrahim, Y. Elsworth, Hekker, S, Elsworth, Yvonne, S. Hekker, De Ridder, J, J. De Ridder, Hekker, S., J. Li, Gilliland, R.L., Kallinger, T., Elsworth, Y., Li, J., Kallinger, T, Stello, D, D. Stello   +29 more
core   +1 more source

Azobenzene's Cross‐Scale Optics and Photonics: Molecular Photoswitching, Mesoscopic Material Motions, and Adaptive Devices

Advanced Materials, EarlyView.
Azobenzene photoswitches translate molecular‐scale E/Z photoisomerization into macroscopic material responses and device‐level photonic functions. This Review highlights how azobenzene research has evolved from molecular photochemistry to photoalignment, mass migration, photomechanics, and heat release, ultimately enabling holography, reconfigurable ...
Heeju Son, Soyul Kwak, Heerin Noh, Minsang Kim, Doyeon Noh, Subhayan Chakraborty, Jaewon Lee, YongDeok Cho, Kyeongsoo Kim, Taewoong Eom, Moonyoung Kim, Jangwon Kim, Hoyoung Lee, Soyoung Lee, Jaehun Kim, Grace G. D. Han, Shin‐Tson Wu, Stefano Oscurato, Arri Priimagi, Marina Saphiannikova, Seungwoo Lee   +20 more
wiley   +1 more source

The UK Infrared Telescope M33 monitoring project - IV. Variable red giant stars across the galactic disc [PDF]

, 2015
We have conducted a near-infrared monitoring campaign at the UK InfraRed Telescope, of the Local Group spiral galaxy M33 (Triangulum). The main aim was to identify stars in the very final stage of their evolution, and for which the luminosity is more ...
Van Loon
core   +1 more source

Neuromorphic Electronics for Intelligence Everywhere: Emerging Devices, Flexible Platforms, and Scalable System Architectures

Advanced Materials, EarlyView.
The perspective presents an integrated view of neuromorphic technologies, from device physics to real‐time applicability, while highlighting the necessity of full‐stack co‐optimization. By outlining practical hardware‐level strategies to exploit device behavior and mitigate non‐idealities, it shows pathways for building efficient, scalable, and ...
Kapil Bhardwaj, Roshni Satheesh Babu, Yuxin Xia, Eva Bestelink, Radu Sporea, Nikos Hastas, Ioannis Zeimpekis, Dimitra G. Georgiadou, Sayani Majumdar   +8 more
wiley   +1 more source

Period Study of Post-Red Giant Stars

, 2014
Stars age through time and go through a series of stages. My group’s research involves stars in between the red giant and the white dwarf stages.
Freund, Stephen
core   +1 more source

Measuring the Hall Effect in Hysteretic Materials

Advanced Materials, EarlyView.
The authors highlight common pitfalls in measuring the Hall effect: in hysteretic magnets, improper data processing can create signals that look exotic but are not real. This Perspective explains the origin of these artifacts and presents practical measurement strategies that help researchers identify reliable Hall responses in complex magnetic ...
Jaime M. Moya, Anthony Voyemant, Sudipta Chatterjee, Scott B. Lee, Grigorii Skorupskii, Connor J. Pollak, Leslie M. Schoop   +6 more
wiley   +1 more source

A New Method for the Asteroseismic Determination of the Evolutionary State of Red-Giant Stars [PDF]

, 2016
Determining the ages of red-giant stars is a key problem in stellar astrophysics. One of the difficulties in this determination is to know the evolutionary state of the individual stars – i.e. have they started to burn Helium in their cores?
Davies, G., Davies, Guy., Elsworth, Y., Basu, S., Hekker, S.   +4 more
core   +1 more source

Precise radial velocities of giant stars XVI. Planet occurrence rates from the combined analysis of the Lick, EXPRESS, and PPPS giant star surveys

, 2022
RV surveys of evolved stars allow us to probe a higher stellar mass range compared to main-sequence samples. Differences between the planet populations can be caused by either the differing stellar mass or stellar evolution.
Wolthoff, Vera, Jones, Matías I., Andreas Quirrenbach, Jenkins, James S., James S. Jenkins, Vera Wolthoff, Sabine Reffert, Matías I. Jones, Robert A. Wittenmyer, Reffert, Sabine, Wittenmyer, Robert A., Quirrenbach, Andreas   +11 more
core   +1 more source