Results 51 to 60 of about 711 (177)

Lattice-Spin Mechanism in Colossal Magnetoresistive Manganites

Physical Review Letters, 2002
We present a single-orbital double-exchange model, coupled with cooperative phonons (the so called breathing-modes of the oxygen octahedra in manganites). The model is studied with Monte Carlo simulations. For a finite range of doping and coupling constants, a first-order Metal-Insulator phase transition is found, that coincides with the Paramagnetic ...
Vergés, J. A., Martín Mayor, Víctor, Brey, L.   +2 more
openaire   +5 more sources

Engineering a Correlated Narrow‐Gap Semiconductor: Effects of Ga Substitution in EuZn2P2

Advanced Electronic Materials, EarlyView.
ABSTRACT The effect of Ga substitution on the electronic, magnetic, and low‐energy responses of the Zintl phase EuZn2P2${\rm EuZn}_2 {\rm P}_2$ is investigated by electrical transport, electron spin resonance (ESR), and terahertz time‐domain spectroscopy (THz‐TDS). Incorporating Ga into EuZn2P2${\rm EuZn}_2 {\rm P}_2$ (EuZn1.8Ga0.2P2${\rm EuZn}_{1.8} {\
Mateus Dutra, Esteban Marulanda, Gustavo G. Vasques, Jaime Ferreira Oliveira, Pedro C. Sabino, Rebeca Brigato Delgado, Leticie Mendonça‐Fereira, Adriano R. V. Benvenho, Elisa Baggio‐Saitovitch, Ricardo K. Machado, Nicolas M. Kawahala, Julian Munevar, Marcos A. Avila, Felix G. G. Hernandez   +13 more
wiley   +1 more source

Modelling colossal magnetoresistance manganites [PDF]

Journal of Physics: Condensed Matter, 2007
I briefly survey here attempts to model the rich and strange behaviour of colossal magnetoresistance manganites, after outlining some of the phenomena observed in them, and describing the three relevant strong local interactions of the e_g electrons (in two different orbital states at each site), namely with Jahn-Teller phonon modes (strength g), with ...
openaire   +2 more sources

Percolation and the Colossal Magnetoresistance of Eu-Based Hexaboride [PDF]

Physical Review Letters, 2004
Upon substituting Ca for Eu in the local-moment ferromagnet EuB6, the Curie temperature T(C) decreases substantially with increasing dilution of the magnetic sublattice and is completely suppressed for ...
Wigger, G. A., Beeli, C., Felder, E., Ott, H. R., Bianchi, A. D., Fisk, Z.   +5 more
openaire   +4 more sources

Machine Learning‐Assisted Second‐Order Perturbation Theory for Chemical Potential Correction Toward Hubbard U Determination

Advanced Intelligent Discovery, EarlyView.
In this work, the Doubao large language model (LLM) is involved in the formula derivation processes for Hubbard U determination regarding the second‐order perturbations of the chemical potential. The core ML tool is optimized for physical domain knowledge, which is not limited to parameter prediction but rather serves as an interactive physical theory ...
Mingzi Sun, Tong Wu, Baian Chen, Zikang Li, Qiuyang Lu, Lu Lu, Hon Ho Wong, Cheuk Hei Chan, Bolong Huang   +8 more
wiley   +1 more source

Elementary Steps of Energy Conversion in Strongly Correlated Systems: Beyond Single Quasiparticles and Rigid Bands

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This article reviews the fundamental consequences of strong correlations on excitations and elementary steps of energy conversion leading to new opportunities to control energy conversion. Examples include friction at surfaces, thermal transport, and photovoltaic energy conversion.
Vasily Moshnyaga, Peter E. Blöchl, Vitaly Bruchmann‐Bamberg, Annika Dehning, Lukas Allen‐Rump, Christopher Hausmann, Matthias Krüger, Amrith Rathnakaran, Sangeeta Rajpurohit, Daniel Steil, Christoph Flathmann, Jörg Hoffmann, Michael Seibt, Cynthia Volkert, Christian Jooss   +14 more
wiley   +1 more source

Charge localization in disordered colossal-magnetoresistance manganites [PDF]

Physical Review B, 1997
4 pages, RevTex.
Li, Qiming, Zang, Jun, Bishop, A. R., Soukoulis, C. M.   +3 more
openaire   +2 more sources

Recent advances in spin‐orbit torque and magnetization switching of transition metal oxides

InfoScience, EarlyView.
This review systematically introduces recent advances in transition metal oxides spintronics, including the underlying mechanisms of spin current generation and related symmetry theory, the magnetization switching processes driven by spin currents and magnon currents, respectively, as well as their corresponding transport properties, finally presenting
Wenjing Huo, Huihui Ji, Minrui Li, Xiaoya Li, Xinyang Zhang, Xuanchi Zhou, Guowei Zhou, Xiaohong Xu   +7 more
wiley   +1 more source

Magnetic Semiconductors as Materials for Spintronics

Magnetochemistry, 2022
From the various aspects of spintronics the review highlights the area devoted to the creation of new functional materials based on magnetic semiconductors and demonstrates both the main physical phenomena involved and the technical possibilities of ...
Andrei Telegin, Yurii Sukhorukov
doaj   +1 more source

Colossal magnetoresistance in manganites and related prototype devices [PDF]

Chinese Physics B, 2013
We review colossal magnetoresistance in single phase manganites, as related to the field sensitive spin charge interactions and phase separation; the rectifying property and negative/positive magnetoresistance in manganite/Nb:SrTiO3 pn junctions in relation to the special interface electronic structure; magnetoelectric coupling in manganite ...
Liu, Yukuai, Yin, Yuewei, Li, Xiaoguang
openaire   +2 more sources