Results 41 to 50 of about 1,114,315 (242)
THz‐Driven Coherent Phonon Fingerprints of Hidden Symmetry Breaking in 2D Layered Hybrid Perovskites
Advanced Materials, EarlyView.Intense THz pulses are employed to drive coherent phonons in 2D Ruddlesden‐Popper hybrid metal‐halide perovskites (HOIPs) from the (PEA)2(MA)n‐1PbnI3n+1 family, revealing mode‐selective spectroscopic signatures of inversion symmetry breaking in those nominally centrosymmetric materials. These findings provide a handle to decode nonlinear phonon driving
Joanna M. Urban +14 more
wiley +1 more source
Maximal transcendental weight contribution of scattering amplitudes
Journal of High Energy Physics, 2022 Feynman integrals in quantum field theory evaluate to special functions and numbers that are usefully described by the notion of transcendental weight. In this paper, we propose a way of projecting a given dimensionally-regularised Feynman integral, for ...
Johannes M. Henn +1 more
doaj +1 more source
Boosting the Transparency of Metallic SrNbO3 Through Ti Doping
Advanced Materials Interfaces, EarlyView.Transparent conductors are optoelectronic devices of high demand. The present study presents a path on how to boost the figure of merit of the recently proposed perovskite oxides: Ti doping reduces electronic correlations and thus the absorption above the plasma frequency, while keeping the plasma frequency below the visible range.
Shammi Kumar +5 more
wiley +1 more source
A change of scale formula for Wiener integrals of cylinder functions on abstract Wiener space
International Journal of Mathematics and Mathematical Sciences, 1998 The purpose of this paper is to establish the existence of analytic Wiener and Feynman integrals for a class of certain cylinder functions which is of the form: F(x)=f((h1,x)∼,⋯,(hn,x)∼), x∈B, on the abstract Wiener space, and to establish the ...
Young Sik Kim
doaj +1 more source
Why we need Non absolute integral in place of Lebesgue integral?
Dera Natung Government College Research Journal, 2021 In this survey note we discuss about non absolute integrable functions and we put our view about the question: Why we need Non absolute integral in place of Lebesgue integral?
Hemanta Kalita, Bipan Hazarika
doaj +1 more source
FIESTA5: Numerical high-performance Feynman integral evaluation [PDF]
Computer Physics Communications, 2021 A. Smirnov +2 more
semanticscholar +1 more source
Advanced Materials Interfaces, EarlyView.Magnetoresistance measurements on a series of polycrystalline cesium tin iodide (CsSnI3) thin film devices having varying grain sizes reveal no power law dependence with clear signatures of weak anti‐localization (spin‐orbit coupling). Surprisingly, the extracted phase coherence lengths are found to be independent of grain sizes.
Aungkan Sen +6 more
wiley +1 more source
The ε-form of the differential equations for Feynman integrals in the elliptic case
Physics Letters B, 2018 Feynman integrals are easily solved if their system of differential equations is in ε-form. In this letter we show by the explicit example of the kite integral family that an ε-form can even be achieved, if the Feynman integrals do not evaluate to ...
Luise Adams, Stefan Weinzierl
doaj +1 more source
Advanced Science, EarlyView.A galvanic replacement strategy is employed to fabricate hollow PdAg alloy nanotubes, where interfacial oxygen triggers surface reconstruction and stabilizes quasi‐single Pd active sites. This atomic‐level engineering optimizes electronic configurations and enriches exposed catalytic centers, significantly boosting oxygen reduction reaction activity ...
Zongge Li +11 more
wiley +1 more source
SciPost Physics Proceedings, 2022 Last year we released version 2.0 of the Feynman integral reduction program Kira. In this contribution we first report on changes and new features since then and, secondly, on new features for upcoming releases.
Fabian Lange, Philipp Maierhöfer, Johann Usovitsch
doaj +1 more source