Low-frequency ac transport in silicene nanosystem with normal-metal electrodes

AbstractBaM0.5Sr0.5TiO3 (BST) is a first candidate material for the development of voltage-tunable microwave devices, such as, filter, phase-shifter and VCO. In this work, crystal structures and dielectric properties of BST film are investigated with and without SrRuO3(SRO) buffer layers. BST and SRO thin films are sequentially prepared by pulsed laser deposition and Au/Ti metal electrodes are fabricated by a DC magnetron sputtering system. The capacitance of the capacitors has been measured as a function of bias voltages at room temperature using a low frequency LCR meter. For the high frequency characteristics (∼2GHz), a microstrip resonator with ∼2GHz resonance frequency and the center coupling design is fabricated. Using flip-chip BST capacitor attached at the position of the center coupling on the microstrip resonator, Its dielectric loss and tunability were obtained. The microwave loss was obviously enhanced in the film with SRO buffer layer..

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Strain and electric field tunable electronic transport in armchair phosphorene nanodevice with normal-metal electrodes

AIP Advances ◽

10.1063/5.0021775 ◽

2020 ◽

Vol 10 (10) ◽

pp. 105012

Author(s):

Guo-Hong Chen ◽

Yi-Nuo Chen ◽

Yan-Wei Zhou ◽

Yun-Lei Sun ◽

En-Jia Ye

Keyword(s):

Electric Field ◽

Electronic Transport ◽

Normal Metal ◽

Metal Electrodes

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Vacuum tunnelling thermopower: Normal metal electrodes

Solid State Communications ◽

10.1016/0038-1098(87)90299-7 ◽

1987 ◽

Vol 61 (5) ◽

pp. 289-295 ◽

Cited By ~ 18

Author(s):

C.R. Leavens ◽

G.C. Aers

Keyword(s):

Normal Metal ◽

Metal Electrodes

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СВЧ-импеданс тонкопленочных гибридных структур сверхпроводник--нормальный металл с большим отношением проводимостей

Физика твердого тела ◽

10.21883/ftt.2019.09.48117.14n ◽

2019 ◽

Vol 61 (9) ◽

pp. 1722

Author(s):

С.С. Уставщиков ◽

А.Ю. Аладышкин ◽

В.В. Курин ◽

В.А. Маркелов ◽

А.И. Елькина ◽

...

Keyword(s):

Metal Layer ◽

Functional Dependence ◽

Low Frequency ◽

Normal Metal ◽

Hybrid Structures ◽

Quasi Particle ◽

Microwave Dielectric ◽

Magnetic Screening ◽

Critical Temperature Tc ◽

Thin Superconducting Films

Temperature dependence of linear electrodynamic response of thin-film hybrid structures superconductor (MoN) — normal metal (Al) with large ratio of normal-state conductivities was studied theoretically and experimentally. Low-frequency measurements of the mutual inductance of two coils with a sample placed between them indicated an increase in magnetic screening ability of the superconductor – normal metal (SN) hybrid structures at liquid helium temperatures as $d_Al$ increases, where $d_Al$ is the thickness of the Al layer. Measurements of the frequency shift $\delta f$ of the microwave dielectric resonator, which was in contact with the SN samples as a function of temperature and $d_Al$ demonstrated that (i) type of the $\delta f(T)$ dependence depends significantly on $d_Al$ and (ii) the shift of resonant frequency of the SN structures at temperatures close to the critical temperature Tc cannot be approximated by a functional dependence $const/(1–T/T_c)$, which is typical for thin superconducting films. Numerical calculations performed within the Usadel model describe the observed effects quite well. Thus, the mentioned anomalies of the electrodynamic properties of the SN hybrid structures can be explained by an appearance of a mini-gap in the spectrum of quasi-particle excitation caused by the proximity effect in the normal metal layer, which depends on $d_Al$ as well as by the high conductivity of the Al layer.

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