Results 31 to 40 of about 192,119 (253)

Scaling of THz-conductivity at metal-insulator transition in doped manganites

, 2006
Magnetic field and temperature dependence of the Terahertz conductivity and permittivity of the colossal magnetoresistance manganite Pr_{0.65}Ca_{0.28}Sr_{0.07}MnO_3 (PCSMO) is investigated approaching the metal-to-insulator transition (MIT) from the ...
A. A. Mukhin, A. K. Jonscher, A. K. Zvezdin, A. Loidl, A. M. Balbashov, A. Pimenov, A. R. Long, D. Ivannikov, E. L. Nagaev, H. Böttger, M. Biberacher, M. Born, N. F. Mott, Yu. G. Goncharov, Z. Jirák   +14 more
core   +1 more source

A New Threshold Switching Device With Tunable Negative Differential Resistance Based on ErMnO3 Polymorphs

Advanced Functional Materials, EarlyView.
Polymorph engineering in ErMnO3 enables low‐voltage, forming‐free threshold switching with tunable negative differential resistance. Conducting orthorhombic regions embedded in an insulating hexagonal matrix provide controlled Joule‐heating‐enhanced Poole–Frenkel transport. The hexagonal phase prevents excessive heating and breakdown.
Rong Wu, Florian Maudet, Thanh Luan Phan, Wassim Hamouda, Richard Schroedter, Ahmet Samil Demirkol, Ronald Tetzlaff, Veeresh Deshpande, Catherine Dubourdieu   +8 more
wiley   +1 more source

From topological insulators to superconductors and Confinement

, 2012
Topological matter in 3D is characterized by the presence of a topological BF term in its long-distance effective action. We show that, in 3D, there is another marginal term that must be added to the action in order to fully determine the physical ...
Diamantini, M. Cristina, Sodano, Pasquale, Trugenberger, Carlo A.   +2 more
core   +1 more source

Frequency-dependent substrate characterization via an iterative pole search algorithm [PDF]

, 2011
The characterization of frequency-dependent material properties is an important issue in nowadays high-speed interconnect design. This letter presents a practical method to determine the complex permittivity of a substrate material, by combining ...
Cauwe, Maarten, De Zutter, Daniël, Demeester, Thomas   +2 more
core   +1 more source

Enhanced Terahertz Thermoelectricity Via Engineered Van Hove Singularities and Nernst Effect in Moiré Superlattices

Advanced Functional Materials, EarlyView.
Moiré band engineering in graphene/hexagonal boron nitride–based superlattices unlocks van Hove singularities (VHSs) for terahertz (THz) optoelectronics. Tuning the Fermi level near these singularities, associated with secondary neutrality points (SNPs), enhances the photothermoelectric response.
Leonid Elesin, Arthur L. Shilov, Subhajit Jana, Ilya Mazurenko, Pierre A. Pantaleon, Mikhail Kashchenko, Nikita Krivovichev, Viacheslav Dremov, Igor Gayduchenko, Takashi Taniguchi, Kenji Watanabe, Yibo Wang, Kostya S. Novoselov, Dmitry A. Svintsov, Grigory Goltsman, Elena I. Titova, Denis A. Bandurin   +16 more
wiley   +1 more source

Generalized plasma-like permittivity and thermal Casimir force between real metals

, 2007
The physical reasons why the Drude dielectric function is not compatible with the Lifshitz formula, as opposed to the generalized plasma-like permittivity, are presented. Essentially, the problem is connected with the finite size of metal plates.
Ashcroft N W, B Geyer, Bezerra V B, Bimonte G, Casimir H B G, Chen F, Elizalde E, Erdélyi A, G L Klimchitskaya, Geyer B, Gradshtein I A, Høye J S, Jackson J D, Klimchitskaya G L, Klimchitskaya G L, Lamoreaux S K, Landau L D, Lifshitz E M, Milonni P W, Milton K A, Milton K A, Mostepanenko V M, Mostepanenko V M, Parsegian V A, V M Mostepanenko   +24 more
core   +1 more source

permittivity

, 2014
Citation: 'permittivity' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.P04507 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Spatially Modulated Morphotropic Phase Boundaries in a Compressively Strained Multiferroic Thin Film

Advanced Functional Materials, EarlyView.
ABSTRACT The coexisting rhombohedral‐like (R′, MA) and tetragonal‐like (T′, MC) monoclinic phases in compressively strained bismuth ferrite thin films exhibit exceptional piezoelectric and magnetic properties. While previous studies have largely focused on probing the morphotropic phase boundaries (MPBs) comprising ordered R′/T′ twins, their self ...
Ting‐Ran Liu, Xiangwei Guo, Sajid Husain, Maya Ramesh, Pushpendra Gupta, Darrell Schlom, Ramamoorthy Ramesh, Yu‐Tsun Shao   +7 more
wiley   +1 more source

Dual‐Programmable Architected Magnetic Soft Materials: Tuning Mechano–Electric Responses by Inverse Design

Advanced Functional Materials, EarlyView.
ABSTRACT Materials that can deform, sense, and autonomously generate power in response to wireless magnetic fields, through both magnetic‐actuated shape transformation and charge generation, are an emerging focus in advanced functional materials research.
Zhi Zhao, Xiaojia Shelly Zhang
wiley   +1 more source

Nontrivial dependence of dielectric stiffness and SHG on dc bias in relaxors and dipole glasses

, 2004
Dielectric permittivity and Second Harmonic Generation (SHG) studies in the field-cooled mode show a linear dependence of dielectric stiffness (inverse dielectric permittivity) on dc bias in PMN-PT crystals and SHG intensity in KTaO$_{3}$:Li at small Li ...
A. S. Emelyanov, Chu F., Colla E. V., Eden S., Emel’yanov S. M., Eugene V. Colla, I. P. Raevski, J-L. Dellis, L. Jastrabik, M. El Marssi, Patashinski A. Z., Raevski I. P., S. A. Prosandeev, S. E. Kapphan, Sakudo T., Vaks V. G.   +15 more
core   +1 more source