Results 91 to 100 of about 65,692 (330)

Antiferromagnetism in metals: from the cuprate superconductors to the heavy fermion materials [PDF]

open access: yesJournal of Physics: Condensed Matter, 2012
The critical theory of the onset of antiferromagnetism in metals, with concomitant Fermi surface reconstruction, has recently been shown to be strongly coupled in two spatial dimensions.
S. Sachdev, M. Metlitski, M. Punk
semanticscholar   +1 more source

Symmetry Enhanced Unconventional Spin Current Anisotropy in a Collinear Antiferromagnet

open access: yesAdvanced Functional Materials, EarlyView.
Spin‐orbit torques (SOTs) are investigated in epitaxial FeSn, a topological antiferromagnet with kagome lattice symmetry. Combining experimental and theoretical approaches, the study identifies a six‐fold conventional damping‐like spin‐orbit torque (DL SOT), along with the coexistence of both six‐fold and uniaxial unconventional field‐like torque (FL ...
Pankhuri Gupta   +10 more
wiley   +1 more source

Photocurrent Spectroscopy of Dark Magnetic Excitons in 2D Multiferroic NiI2

open access: yesAdvanced Science
Two‐dimensional (2D) antiferromagnetic (AFM) semiconductors are promising components of opto‐spintronic devices due to terahertz operation frequencies and minimal interactions with stray fields. However, the lack of net magnetization significantly limits
Dmitry Lebedev   +12 more
doaj   +1 more source

Properties of Mn2+ and Π-Electron Spin Systems Probed by 1H and 13C NMR in the Organic Conductor κ-(BETS)2Mn[N(CN)2]3

open access: yesCrystals, 2012
Properties of the spin systems of the localized 3d Mn2+ ions and the conduction π electrons in quasi-two-dimensional organic conductor κ-(BETS)2Mn[N(CN)2]3 were accessed using 1H and 13C NMR in order to find their relation to the metal-insulator ...
Eduard B. Yagubskii   +7 more
doaj   +1 more source

Itinerancy and Hidden Order in $URu_2Si_2$

open access: yes, 2005
We argue that key characteristics of the enigmatic transition at $T_0= 17.5K $ in $URu_2Si_2$ indicate that the hidden order is a density wave formed within a band of composite quasiparticles, whose detailed structure is determined by local physics.
Bernal O O Moroz M E Mydosh J A MacLaughlin D E Lukefahr H G Gortenmulder T   +19 more
core   +1 more source

Field‐Free Spin–Orbit Torque Switching of Perpendicular Magnetization by PtTe2/WTe2 Bilayers at Sub‐ns Timescales

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates ultrafast, field‐free spin–orbit torque (SOT) switching using a PtTe2/WTe2/CoFeB multilayer, achieving sub‐nanosecond magnetization reversal with record‐low energy consumption. The PtTe2/WTe2 bilayer generates an intrinsic out‐of‐plane spin current, enabling deterministic switching without external fields.
Qu Yang   +7 more
wiley   +1 more source

Insights into a Defective Potassium Sulfido Cobaltate: Giant Magnetic Exchange Bias, Ionic Conductivity, and Electrical Permittivity

open access: yesAdvanced Electronic Materials
The novel potassium sulfido cobaltate, K2[Co3S4] is introduced, with 25% vacancies of the cobalt positions within a layered anionic sublattice. The impedance and dielectric investigations indicate a remarkable ionic conductivity of 21.4 mS cm−1 at room ...
M. Reza Ghazanfari   +6 more
doaj   +1 more source

Temperature-dependent gap equations and their solutions in the SU(4) model of high-temperature superconductivity

open access: yes, 2005
Temperature-dependent gap equations in the SU(4) model of high-Tc superconductivity are derived and analytical solutions are obtained. Based on these solutions, a generic gap diagram describing the features of energy gaps as functions of doping P is ...
C.-L. Wu   +9 more
core   +1 more source

Antiferromagnetism and Superconductivity in Cerium based Heavy Fermion Compounds [PDF]

open access: yes, 2011
The study of competing ground states is a central issue in condensed matter physic. In this article we will discuss the interplay of antiferromagnetic order and unconventional superconductivity in Ce based heavy-fermion compounds.
Agterberg   +216 more
core   +3 more sources

Topological insulators with commensurate antiferromagnetism [PDF]

open access: yes, 2013
We study the topological features of non-interacting insulators subject to an antiferromangetic (AFM) Zeeman field, or AFM insulators, the period of which is commensurate with the lattice period. These insulators can be classified by the presence/absence
C. Fang, M. Gilbert, B. Bernevig
semanticscholar   +1 more source

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