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This research focuses on a coherently driven four-level atomic medium with the aim of inducing a negative index of refraction while taking into consideration local field corrections as well as magnetoelectric cross coupling, i.e. chirality,…

材料科学 · 物理学 2011-07-06 F. Bello

We report on the observation of non-metallic electrical conduction, resistive switching, and a negative temperature coefficient of resistance in cluster-assembled nanostructured gold films above the electrical percolation and in…

介观与纳米尺度物理 · 物理学 2020-05-18 M. Mirigliano , S. Radice , A. Falqui , A. Casu , F. Cavaliere , P. Milani

Thin film YIG (Y$_3$Fe$_5$O$_{12}$) is a prototypical material for experiments on thermally generated pure spin currents and the spin Seebeck effect. The 3-omega method is an established technique to measure the cross-plane thermal…

材料科学 · 物理学 2015-09-09 C. Euler , P. Hołuj , T. Langner , A. Kehlberger , V. I. Vasyuchka , M. Kläui , G. Jakob

Graphene/(Poly)vinyl alcohol (PVA) composite film with thickness $60 \mu m$ were synthesized by solidification of a PVA solution comprising of dispersed graphene nanosheets. The close proximity of the graphene sheets enables the fluctuation…

介观与纳米尺度物理 · 物理学 2013-04-23 Sreemanta Mitra , Sourish Banerjee , Dipankar Chakravorty

We propose a sensor free, self regulating thermal switch that combines the anomalous Ettingshausen effect (AEE) with a temperature driven spin reorientation transition (SRT) in the rare earth cobalt compound DyCo$_5$. Using density…

应用物理 · 物理学 2026-03-13 Shibo Wang , Hiroki Tsuchiura , Nobuaki Terakado

This paper presents a simple model for predicting electrical conductivity of air with varying electrode separation and different moisture content present in air. Our system consists of a metallic thin film (Cu) coated sample and a needle…

应用物理 · 物理学 2019-10-29 Ramonika Sengupta , Anand Anil , Santanu Talukder

Surface Fermi arcs are the most prominent manifestation of the topological nature of Weyl semimetals. In the presence of a static magnetic field oriented perpendicular to the sample surface, their existence leads to unique inter-surface…

介观与纳米尺度物理 · 物理学 2015-12-22 Yuval Baum , Erez Berg , S. A. Parameswaran , Ady Stern

We present a quantitative analysis of the steady state electronic transport in a resistive switching device. The device is composed of a thin film of Ag$_{2}$S (solid electrolyte) contacted by a Pt nano-contact acting as ion-blocking…

材料科学 · 物理学 2017-12-11 Monica Morales-Masis , Hans-Dieter Wiemhofer , Jan M. van Ruitenbeek

The recent discovery of magnetic Weyl semimetal Co3Sn2S2 opens up new avenues for research into the interactions between topological orders, magnetism, and electronic correlations. Motivated by the observations of large anomalous Hall…

介观与纳米尺度物理 · 物理学 2022-12-21 Abhirup Roy Karmakar , S. Nandy , A. Taraphder , G. P. Das

The quest for nonmagnetic Weyl semimetals with high tunability of phase has remained a demanding challenge. As the symmetry breaking control parameter, the ferroelectric order can be steered to turn on/off the Weyl semimetals phase, adjust…

We suggest the nondestructive method for determination of the dielectric constant of substrate-deposited thin films by capacitance measurement with two parallel wires placed on top of the film. The exact analytical formula for the…

介观与纳米尺度物理 · 物理学 2016-11-29 Svitlana Kondovych , Igor Luk'yanchuk

We study the anomalous Nernst effect (ANE) and anomalous Hall effect (AHE) in proximity-induced ferromagnetic palladium and platinum which is widely used in spintronics, within the Berry phase formalism based on the relativistic band…

材料科学 · 物理学 2014-06-10 G. Y. Guo , Q. Niu , N. Nagaosa

The objective of this paper is all-angle artificial magnetic conductor, i.e. artificial magnetic conductor that has stable magnetic-wall effect with respect to the incidence angle. Furthermore, we seek for a design that would be easy for…

经典物理 · 物理学 2009-08-21 Olli Luukkonen , Constantin R. Simovski , Sergei A. Tretyakov

Transverse thermoelectric devices consist of only one thermoelectric material, unlike conventional longitudinal thermoelectric devices that require two types of thermoelectric materials with p- and n-type polarities. However, scalable…

应用物理 · 物理学 2021-11-24 Naoto Nakamura , Yosuke Goto , Yoshikazu Mizuguchi

Kagome metal TbMn6Sn6 was recently discovered to be a ferrimagnetic topological Dirac material by scanning tunneling microscopy/spectroscopy measurements. Here, we report the observation of large anomalous Nernst effect and anomalous…

材料科学 · 物理学 2022-03-23 Heda Zhang , Jahyun Koo , Chunqiang Xu , Milos Sretenovic , Binghai Yan , Xianglin Ke

We investigate the electric and thermal transport properties in a disordered Weyl ferromagnet on an equal footing by using the Keldysh formalism in curved spacetime. In particular, we calculate the anomalous thermal Hall conductivity, which…

介观与纳米尺度物理 · 物理学 2017-04-06 Atsuo Shitade

We calculate the electric conductivity $\sigma$ in deconfined QCD matter using a holographic QCD model, i.e., the Sakai-Sugimoto Model with varying magnetic field $B$ and chiral anomaly strength. After confirming that our estimated $\sigma$…

高能物理 - 唯象学 · 物理学 2022-03-23 Kenji Fukushima , Akitoshi Okutsu

We consider magnetic flux penetration in a superconducting film with a concave corner. Unlike convex corners, where the current flow pattern is easily constructed from Bean's critical state model, the current flow pattern at a concave…

超导电性 · 物理学 2013-05-07 J. I Vestgarden , T. H. Johansen

Epoxy nanocomposites able to meet pressing industrial requirements in the field of structural material have been developed and characterized. Tunneling Atomic Force Microscopy (TUNA), which is able to detect ultra-low currents ranging from…

We calculate the surface dc conductivity of Weyl semimetals and show that it contains an anomalous contribution in addition to a Drude contribution from the Fermi arc. The anomalous part is independent of the surface scattering time, and…

介观与纳米尺度物理 · 物理学 2022-12-23 Hridis K. Pal , Osakpolor Eki Obakpolor , Pavan Hosur