Results 91 to 100 of about 28,163 (235)

Stepwise Engineering of Van der Waals Heterostructures for High Current Density in Light Emitting Devices

open access: yesAdvanced Electronic Materials, EarlyView.
A novel strategy for achieving high current density in van der Waals (vdW) heterostructure‐based light‐emitting devices (LEDs) is proposed. Based on this concept, an LED utilizing a WS2/WSe2 heterostructure was fabricated, achieving a current density of 9.4 × 104 A/cm2.
Rei Usami   +7 more
wiley   +1 more source

Microscopic theory for high-T-c superconductivity

open access: yes, 1999
An understanding of superconductivity in the holes doped cuprates is formulated as resulting from (i) recovery of superexchange interactions at T(spin-gap), (ii) appearance of a holes clustering instability at the T(pseud-gap), and (iii) virtual spin ...
Panas, Itai,
core  

Solution Synthesis of Actinide Chalcogenide and Oxychalcogenide Nanoparticles

open access: yesAngewandte Chemie, EarlyView.
We report the synthesis of UOS, UOSe, and US2 nanoparticles under colloidal conditions. The magnetic properties were measured of all three materials and compared to prior studies of UO2 nanoparticles. Nanoparticle phases were determined using powder diffraction, and size by transmission electron microscopy.
Cheyenne Orozco   +7 more
wiley   +2 more sources

Atomically Modulating Competing Exchange Interactions in Centrosymmetric Skyrmion Hosts GdRu2X2 (X = Si and Ge)

open access: yesAdvanced Electronic Materials, EarlyView.
Our work bridges the gap between skyrmion discovery and material design by demonstrating how atomic‐scale control of exchange interactions enables tunable skyrmion phase transitions in centrosymmetric magnetic metals. ABSTRACT Magnetic skyrmions are topologically protected spin states that hold promise for shaping the future of electronics.
Dasuni N. Rathnaweera   +9 more
wiley   +1 more source

Topological Materials and Related Applications

open access: yesAdvanced Electronic Materials, EarlyView.
This review covers topological materials—including topological insulators, quantum valley Hall and quantum spin Hall insulators, and topological Weyl and Dirac semimetals—as well as their most recent advancements in fields such as spintronics, electronics, photonics, thermoelectrics, and catalysis.
Carlo Grazianetti   +9 more
wiley   +1 more source

A study of superconductivity in single crystals and thin films using muon-spin rotation and neutron scattering

open access: yes, 2009
The archetypal high temperature superconductor Bi₂Sr₂CaCu₂O[subscript[8+δ]] has been extensively investigated. However, until now, little has been known about the behaviour of the magnetic vortices inside the Vortex Glass and liquid state.
Heron, David Owen Goudie
core  

Superconducting TaH5 at high pressure

open access: yesNew Journal of Physics, 2019
Recently, the significant development, in the field of high-temperature superconductivity among the compressed elements hydrides (such as LaH _10 ), opens up a door in pursuing room-temperature superconductors.
Hefei Li   +5 more
doaj   +1 more source

Electric Field‐Induced Hole‐ and Electron‐Type Flat Bands in Twisted Double Bilayer Graphene

open access: yesAdvanced Electronic Materials, EarlyView.
The electronic structure of twisted double bilayer graphene is visualized using angle‐resolved photoemission spectroscopy with micrometer spatial resolution at twists of 3.1∘$^\circ$ and 6.0∘$^\circ$ as a function of gate voltage. Tunable hybridization effects and flat band formation occurs between valence and conduction band states due to a finite ...
Zhihao Jiang   +13 more
wiley   +1 more source

High temperature superconducting with two doping atoms in La-doped Bi-2201 and Y-doped Bi-2212

open access: yes, 2009
These crystals have two doping patterns given by oxygen excess and doping with an additional atom with projected positions in theCuO2 plane. Both doping elements are necessary for the occurrence of superconductivity.
Huber, F.   +3 more
core  

High-temperature superconductivity in Eu0.5K0.5Fe2As2 [PDF]

open access: yes, 2008
EuFe(2)As(2) shows a spin-density wave (SDW) type transition at 190 K and antiferromagnetic (AF) order below 20 K. Here, we have studied the effect of K substitution on the SDW transition at high temperature and AF Eu order at low temperature.
Gegenwart, Philipp   +11 more
core   +1 more source

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