Results 61 to 70 of about 553,609 (298)

Plaid‐Like Spin Splitting and Chirality of Magnon Bands in Antiferromagnetic MnTe2

Advanced Science, EarlyView.
Helicity‐ and angle‐resolved Raman spectroscopy reveals chiral magnons in the non‐coplanar antiferromagnet MnTe 2. Combined with first‐principles calculations and spin‐wave theory, the results establish its altermagnetic character through circular Raman dichroism, reduced rotational symmetry, and a distinctive plaid‐like momentum‐space magnon spin ...
Dirk Wulferding, Daehyeon An, Jiwon Choi, Dongmin Moon, Youngsu Choi, Sivasakthi Kuppusamy, Sritharan Krishnamoorthi, Raman Sankar, Myung Joon Han, Se Kwon Kim, Kwang‐Yong Choi   +10 more
wiley   +1 more source

Structural Colors from Modulated Topological Defects in Molecular Smectic Liquid Crystals

Advanced Science, EarlyView.
Rather than using dyes and pigments, nature produces the colors of some butterflies and beetles through optical interference phenomena. This study describes an original biomimetic strategy exploiting the spontaneous formation of modulated linear defects in thin films of 8CB, a common molecular liquid crystal.
Camille N. Mahyaoui, Guilhem Poy, Rabab Zehra, Axel Fouques, Vassili Sergan, Ivan Dozov, Claire Meyer, Patrick Davidson   +7 more
wiley   +1 more source

Collision Probability Evaluation of LAMOST Robotic Fiber Positioners in the Design Phase

The Astronomical Journal
Multiobject spectroscopic telescopes are crucial for modern astronomy. Among them, the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), with thousands of robotic fiber positioners (RFPs), is the one with the highest spectra acquisition
Baolong Chen, Jianping Wang, Jiahao Zhou, Zhigang Liu, Hongzhuan Hu, Zengxiang Zhou, Feifan Zhang   +6 more
doaj   +1 more source

Review of topo-astronomical methods for the precise orientation in archaeological sites

, 2009
Cosmology across cultures; workshop held at Parque de las Ciencias, Granada, Spain, 8-12 September 2008.A review of the methods and instrumentation used in the determination of topo-astronomical alignments is presented in this paper, with a detailed ...
Folgueira López, Marta, Pascual, Esther, Mejuto, Javier, Rodríguez Caderot, Gracia   +3 more
core   +1 more source

Human Foetal Neuroblasts Exhibit BK Channel‐Dependent Membrane Voltage Oscillations upon Depolarization

Advanced Science, EarlyView.
Primary cultures of neuroblasts isolated from the nucleus basalis of Meynert of 12‐weeks‐old human foetuses were prepared. Whole‐cell patch‐clamp recordings were performed by injecting a depolarizing stimulus current (+500 pA; 500 ms), and the membrane voltage recorded; this stimulus current evoked periodic‐like oscillations in membrane voltage ...
Elisabetta Coppi, Federica Cherchi, Martina Venturini, Federico Tommasi, Sandro Gonzi, Chiara Capacci, Giulia Guarnieri, Pasquale Gallina, Annamaria Morelli, Anna Maria Pugliese   +9 more
wiley   +1 more source

Guangqi: A 2D Radiation Hydrodynamic Code with Realistic Equations of State

The Astrophysical Journal Supplement Series
We present Guangqi , a new 2D, finite-volume radiation hydrodynamics code designed for high-performance astrophysical simulations. The code simultaneously resolves the hydrodynamic equations for complex equations of state (EoS) and implicit radiation ...
Zhuo Chen, Xue-Ning Bai
doaj   +1 more source

Terahertz‐Nanoscale Visualization of the Microscopic Spin‐Charge Architecture of Colossal Magnetoresistive Switching

Advanced Science, EarlyView.
This study employs cryogenic magneto‐terahertz nanoscopy to reveal the real‐space electrodynamics of the colossal magnetoresistance transition. By capturing the terahertz electrodynamic evolution of field‐driven spin switching, the work unveils the dissipative dynamics of emergent metallic states, providing a high‐frequency view of coupled spin‐charge ...
Samuel Haeuser, Randall K. Chan, Richard H. J. Kim, Joong‐Mok Park, Martin Mootz, Thomas Koschny, Jigang Wang   +6 more
wiley   +1 more source

Optimizing Structural Parameters and Layout of Fiber Positioners with the Whale Optimization Algorithm for LAMOST

The Astronomical Journal
Robotic fiber positioner (RFP) arrays are essential for multiobject spectroscopic telescopes. To improve the survey efficiency, they are densely arranged on the focal planes with overlapped patrol areas, guaranteeing full coverage and increasing the ...
Zengxiang Zhou, Jiahao Zhou, Baolong Chen, Jianping Wang, Zhigang Liu, Hongzhuan Hu, Feifan Zhang   +6 more
doaj   +1 more source

Gemini's instrumentation program: Latest results and long-range plan

, 2016
The Gemini Observatory is going through an extraordinary time with astronomical instrumentation. New powerful capabilities are delivered and are soon entering scientific operations.
Kleinman, S, Hanna, Kevin, Adamson, Andy, Perez, G, Walls, Brian, White, John K, Gonzalez, Patricio, Neichel, Benoit, Goodsell, Stephen, Christou, Julian, Boccas, Maxime, Hartung, Markus, Arriagada, Gustavo, Tollestrup, Eric, Lazo, Manuel   +14 more
core   +1 more source

Orbital periods of cataclysmic variables identified by the SDSS. V, VLT, NTT and Magellan observations of nine equatorial systems [PDF]

, 2008
We present Very Large Telescope (VLT) and Magellan spectroscopy and New Technology Telescope photometry of nine faint cataclysmic variables (CVs) which were spectroscopically identified by the Sloan Digital Sky Survey (SDSS).
Hakala, P., Southworth, J., Torres, M. A. P., Mukadam, Anjum S., Steeghs, D., Copperwheat, C. M., Gaensicke, B. T., Aungwerojwit, A., Marsh, T. R.   +8 more
core   +1 more source