Results 71 to 80 of about 115,113 (271)

Evidence of Skyrmion excitations about $\nu =1$ in n-Modulation Doped Single Quantum Wells by Inter-band Optical Transmission

, 1995
We observe a dramatic reduction in the degree of spin-polarization of a two-dimensional electron gas in a magnetic field when the Fermi energy moves off the mid-point of the spin-gap of the lowest Landau level, $\nu=1$. This rapid decay of spin alignment
A. J. Turberfield, A. Usher, B. B. Goldberg, B. B. Goldberg, B. B. Goldberg, B. B. Goldberg, B. B. Goldberg, B. I. Halperin, C. Kallin, D. A. Broido, E. H. Aifer, E. M. Goldys, H. A. Fertig, J. M. Luttinger, J. P. Eisenstein, M. Dahl, S. E. Barrett, S. L. Sondhi, S.-R. E. Yang, T. Ando, Yu. A. Bychkov   +20 more
core   +1 more source

Tunable Multifunctional Terahertz Coding Metasurface for Polarization Manipulation

Advanced Photonics Research, EarlyView.
Coding metasurfaces (CMs) offer versatile control over electromagnetic waves. Herein, a tunable multifunctional terahertz (THz) metasurface integrated with vanadium dioxide (VO2) is presented, enabling propagation‐phase manipulation of linearly polarized waves and hybrid‐phase control of circularly polarized waves.
Chunsheng Zhang, Tingnuo Pan, Xiao Zhang, Wenjia Li, Bo Lv, Yuxiang Li, Zheng Zhu, Chunying Guan, Wanying Liu, Xiaohan Jiang, Jinhui Shi   +10 more
wiley   +1 more source

Efecto del calentamiento global sobre la producción de alfalfa en México

Revista Mexicana de Ciencias Pecuarias, 2020
La alfalfa es el principal cultivo forrajero en México en cuanto a superficie sembrada con 583,561 ha, lo que representa 57.1 %, mientras que los cultivos forrajeros maíz, avena y sorgo representan el 42.9 %.
Guillermo Medina-García, Francisco Guadalupe Echavarría-Cháirez, José Ariel Ruiz-Corral, Víctor Manuel Rodríguez-Moreno, Jesús Soria-Ruiz, Celia De la Mora-Orozco   +5 more
doaj   +1 more source

Terahertz Chiral Recognition Based on Metasurfaces

Advanced Photonics Research, EarlyView.
A novel terahertz chiral sensing method based on a multilayer metallic metasurface is proposed. The left‐handed circularly polarized and right‐handed circularly polarized components in the linearly polarized illuminating light into two focal points and convert them back into linear polarization for convenient measurement.
Xuyang Ji, Yufei Liu, Shuang Sun, Zehao He, Yuyao Yang, Yan Zhang   +5 more
wiley   +1 more source

Non-degenerate valleys in the half-metallic ferromagnet Fe/WS$_2$

, 2017
We present a first principles investigation of the electronic properties of monolayer WS$_2$ coated with an overlayer of Fe. Our ab initio calculations reveal that the system is a half-metallic ferromagnet with a gap of $\sim 1$ eV for the majority spin ...
Bouzar, Hamid, Ibañez-Azpiroz, Julen, Lounis, Samir, Messaoudi, Omar   +3 more
core   +1 more source

Nanophotonic Strategies for Chiral Biosensing: Nanoparticles, Metasurfaces, Magneto‐Optical, and Quantum Approaches

Advanced Photonics Research, EarlyView.
Recent advances in nanophotonics‐based chiral biosensing approaches are comprehensively reviewed, highlighting key trends, advantages, and limitations of each technology. Special attention is given to emerging strategies that exploit magneto‐optical and quantum plasmonic phenomena to enhance sensitivity down to the level of a few molecules, or even a ...
Jorge Ricardo Mejía‐Salazar
wiley   +1 more source

Restricted Conformal Property of Compressive Sensing

, 2014
Energy and direction are tow basic properties of a vector. A discrete signal is a vector in nature. RIP of compressive sensing can not show the direction information of a signal but show the energy information of a signal.
Cheng, Tao
core   +1 more source

Numerical Modeling of Photothermal Self‐Excited Composite Oscillators

Advanced Robotics Research, EarlyView.
We present a numerical framework for simulating photothermal self‐excited oscillations. The driving mechanism is elucidated by highlighting the roles of inertia and overshoot, as well as the phase lag between the thermal moment and the oscillation angle, which together construct the feedback loop between the system state and the environmental stimulus.
Zixiao Liu, Ryan R. Rusch, Zheng Wu, Chi Chen, Pengju Shi, Hao Qiu, Ximin He   +6 more
wiley   +1 more source

Vortices with scalar condensates in two-component Ginzburg–Landau systems

Physics Letters B, 2016
In a class of two-component Ginzburg–Landau models (TCGL) with a U(1)×U(1) symmetric potential, vortices with a condensate at their core may have significantly lower energies than the Abrikosov–Nielsen–Olesen (ANO) ones. On the example of liquid metallic
Péter Forgács, Árpád Lukács
doaj   +1 more source

Multispacecraft observations of the terrestrial bow shock and magnetopause during extreme solar wind disturbances [PDF]

Annales Geophysicae, 2012
Three events are discussed from the declining phase of the last solar cycle when the magnetopause and/or the bow shock were observed unusually close to the Earth due to major interplanetary disturbances.
M. Tátrallyay, G. Erdös, Z. Németh, M. I. Verigin, S. Vennerstrom   +4 more
doaj   +1 more source