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The parallel magnetic field tuned two-dimensional superconductor-insulator transition has been investigated in ultrathin films of amorphous Bi. The resistance is found to be independent of temperature on both sides of the transition below…

超导电性 · 物理学 2009-11-11 Kevin A. Parendo , K. H. Sarwa B. Tan , A. M. Goldman

We study the dependence of the superconducting gaps on both the disorder and the temperature within the two-band model for iron-based materials. In the clean limit, the system is in the $s_\pm$ state with the sign-changing gaps. Scattering…

超导电性 · 物理学 2018-08-16 V. A. Shestakov , M. M. Korshunov , O. V. Dolgov

The temperature dependence of dark conductivity at low temperatures (300-15 K) was studied on a wide microstructural range of well-characterized highly crystallized single phase undoped microcrystalline silicon samples. Our study reveals…

材料科学 · 物理学 2011-11-09 Sanjay K. Ram , Satyendra Kumar , P. Roca i Cabarrocas

We show that random telegraph signals in metal-oxide-silicon transistors at millikelvin temperatures provide a powerful means of investigating tunneling between a two-dimensional electron gas and a single defect state. The tunneling rate…

凝聚态物理 · 物理学 2009-10-28 D. H. Cobden , B. A. Muzykantskii

We study, both theoretically and experimentally, the features on the current-voltage characteristic of a highly transparent Josephson junction caused by transition of the superconducting leads to the normal state. These features appear due…

The superconducting state of the heavy-fermion metal UTe$_2$ has attracted considerable interest because of evidence for spin-triplet Cooper pairing and non-trivial topology. Progress on these questions requires identifying the presence or…

Phase-coherent diffusive transport through mesoscopic hybrid superconductor/normal metal tunneling structures is investigated. For a N-s-S two-barrier tunneling system with bulk S and N electrodes coupled by a mesoscopic superconducting…

超导电性 · 物理学 2009-09-25 A. V. Zaitsev , A. F. Volkov , S. W. D. Bailey , C. J. Lambert

While we demonstrate a back-gated (BG) amorphous Indium-Gallium-Zinc-Oxide (a-IGZO) transistors with a nearly ideal subthreshold slope (SS) ~ 60 mV/dec. However, SS degrades when a top-gated (TG) configuration is implemented. The energy…

In a number of current experiments in the field of spin-caloritronics a temperature gradient across a nanostructured interface is applied and spin-dependent transport phenomena are observed. However, a lack in the interpretation and…

介观与纳米尺度物理 · 物理学 2015-07-23 Jia Zhang , Michael Bachman , Michael Czerner , Christian Heiliger

At T_c-T<<T_c(i.e., near T_c), in order to demonstrate the condudction mechanism and temperature dependencies of the diamagnetic-shielding susceptibility and the penetration depth, we fabricated Ba_1_xBiO_3(BKBO) thin films and measured the…

超导电性 · 物理学 2018-07-04 Hyun-Tak Kim , Kwang-Yong Kang , Seok-Kil Han

Results are presented for the temperature and frequency dependence of the real and imaginary parts of the diagonal self energy for a d-wave superconductor. An Eliashberg analysis, which has been successful in recent fitting of…

超导电性 · 物理学 2012-05-14 O. Ahmadi , L. Coffey

The study of charge current fluctuations (noise) can give useful insights into the properties of nanoscale systems. In this work, the peculiar properties of noise in multiterminal hybrid normal-superconducting systems are explored in the…

介观与纳米尺度物理 · 物理学 2025-07-02 Leonardo Pierattelli , Fabio Taddei , Alessandro Braggio

The tunneling between two parallel two-dimensional electron gases has been investigated as a function of temperature $T$, carrier density $n$, and the applied perpendicular magnetic field $B$. In zero magnetic field the equilibrium resonant…

凝聚态物理 · 物理学 2009-10-28 N. Turner , J. T. Nicholls , E. H. Linfield , K. M. Brown , G. A. C. Jones , D. A. Ritchie

This letter reports thermopower and conductivity measurements through the metal-insulator transition for 2-dimensional electron gases in high mobility Si-MOSFET's. At low temperatures both thermopower and conductivity show critical behavior…

无序系统与神经网络 · 物理学 2007-05-23 R. Fletcher , V. M. Pudalov , A. D. B. Radcliffe , C. Possanzini

Resistive, magnetization, torque, specific heat and scanning tunneling microscopy measurements are carried out on the hole heavily doped CsFe$_2$As$_2$ single crystals. A characteristic temperature $T^*\sim13$ K, which is several times…

超导电性 · 物理学 2016-06-29 Huan Yang , Jie Xing , Zengyi Du , Xiong Yang , Hai Lin , Delong Fang , Xiyu Zhu , Hai-Hu Wen

Several models of thermionic energy nanoconverters have been proposed to study the transport phenomena that take place in electronic devices. For example, in resonant tunneling junctions those phenomena are manifested through the…

介观与纳米尺度物理 · 物理学 2020-06-02 G. Valencia-Ortega , L. A. Arias-Hernandez

Poisson statistics predicts that the shot noise in a tunnel junction has a temperature independent third cumulant e^2\I, determined solely by the mean current I. Experimental data, however, show a puzzling temperature dependence. We…

介观与纳米尺度物理 · 物理学 2007-05-23 C. W. J. Beenakker , M. Kindermann , Yu. V. Nazarov

Understanding of the puzzling phenomenon of high temperature superconductivity requires reliable spectroscopic information about temperature dependence of the bulk electronic density of states. Here I present a comprehensive analysis of…

超导电性 · 物理学 2009-06-11 V. M. Krasnov

Temperature ($T$) dependent conductance $G = G(T)$ data measured in molecular junctions are routinely taken as evidence for a two-step hopping mechanism. The present paper emphasizes that this is not necessarily the case. A curve of $\ln G$…

介观与纳米尺度物理 · 物理学 2022-12-01 Ioan Baldea

We are honored to dedicate this article to Emmanuel Rashba on the occasion of his 95 birthday. In the ideal disorder-free situation, a two-dimensional band gap insulator has an activation energy for conductivity equal to half the band gap,…

介观与纳米尺度物理 · 物理学 2022-12-12 Yi Huang , Brian Skinner , B. I. Shklovskii