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Negative differential conductivity (NDC) is a widely exploited effect in modern electronic components. Here, a proof-of-principle is given for the observation of NDC in a quantum transport device for neutral atoms employing a multi-mode…

Quantum Gases · Physics 2017-08-24 Ralf Labouvie , Bodhaditya Santra , Simon Heun , Sandro Wimberger , Herwig Ott

In this paper, we model the evolution and self-assembly of randomly oriented carbon nanotubes (CNTs), grown on a metallic substrate in the form of a thin film for field emission under diode configuration. Despite high output, the current in…

Materials Science · Physics 2010-04-14 N. Sinha , D. Roy Mahapatra , J. T. W. Yeow , R. V. N. Melnik , D. A. Jaffray

An oscillatory dependence of the drain current on the drain voltage is found in a nanostructure consisting of two crossing semiconductor carbon nanotubes that are suspended over a dielectric trench, which is backed by a doped silicon…

Mesoscale and Nanoscale Physics · Physics 2009-02-19 M. Al Ahmad , D. Dragoman , M. Dragoman , R. Plana , J. -H. Ting , F. -Y. Huang , T. -L. Li

Combining scanning electron microscopy (SEM) and electron-beam-induced current (EBIC) imaging with transport measurements, it is shown that the current flowing across a two-terminal oxide-based capacitor-like structure is preferentially…

Materials Science · Physics 2009-11-07 C. Rossel , G. I. Meijer , D. Bremaud , D. Widmer

For realization the new functional materials and devices by conductive nanomaterials, how to control and realize the optimum networks structures are import point for fundamental, applied and industrial science. In this manuscript, the…

Materials Science · Physics 2019-10-11 Takahiro Morimoto , Seisuke Ata , Takeo Yamada , Toshiya Okazaki

Negative differential conductance (NDC), characterized by the decreasing current with increasing voltage, has attracted continuous attention for its various novel applications. The NDC typically exists in a certain range of bias voltages…

Mesoscale and Nanoscale Physics · Physics 2018-04-04 Si-Yu Li , Haiwen Liu , Jia-Bin Qiao , Hua Jiang , Lin He

Rock-salt type niobium nitride ($\delta$-NbN) is a well-known superconductor having superconducting transition temperature (Tc) $\approx$ 18\,K and a large superconducting gap $\approx$3\,meV. The Tc of $\delta$-NbN thin film exhibits a…

Superconductivity · Physics 2020-10-12 Shailesh Kalal , Sanjay Nayak , Akhil Tayal , Jens Birch , Rajeev Rawat , Mukul Gupta

Negative differential conductance (NDC) manifests as a significant characteristic of various underlying physics and transport processes in hybrid superconducting devices. In this work, we report the observation of gate-tunable NDC outside…

Mesoscale and Nanoscale Physics · Physics 2023-06-06 Mingli Liu , Dong Pan , Tian Le , Jiangbo He , Zhongmou Jia , Shang Zhu , Guang Yang , Zhaozheng Lyu , Guangtong Liu , Jie Shen , Jianhua Zhao , Li Lu , Fanming Qu

We have studied the transport properties of a molecular device composed of donor and acceptor moieties between two electrodes on either side. The device is considered to be one-dimensional with different on-site energies and the…

Mesoscale and Nanoscale Physics · Physics 2016-08-31 S. Lakshmi , Swapan K. Pati

Scanning superconducting quantum interference device measurements reveal large-scale modulations of the superfluid density and the critical temperature in superconducting Nb, NbN, and underdoped $YBa_{2}Cu_{3}O_{7-{\delta}}$ films deposited…

Superconductivity · Physics 2017-04-26 Shai Wissberg , Beena Kalisky

PrMnO3 (PMO) based Resistance Random Access Memory (RRAM) has recently been considered for selector-less RRAM and neuromorphic computing applications by utilizing its current shoot-up. This current shoot-up in the PMO device is attributed…

Applied Physics · Physics 2020-02-04 S. Lashkare , A. Bhat , U. Ganguly

Combining quasistatic and time-resolved transport measurements with X-ray and neutron diffraction experiments we study the non-equilibrium states that arise in pure and in Ti substituted Ca$_2$RuO$_4$ under the application of current…

Strongly Correlated Electrons · Physics 2020-08-12 K. Jenni , F. Wirth , K. Dietrich , L. Berger , Y. Sidis , S. Kunkemöller , C. P. Grams , D. I. Khomskii , J. Hemberger , M. Braden

Diffusion models have emerged as a key pillar of foundation models in visual domains. One of their critical applications is to universally solve different downstream inverse tasks via a single diffusion prior without re-training for each…

Machine Learning · Computer Science 2023-10-03 Morteza Mardani , Jiaming Song , Jan Kautz , Arash Vahdat

We present the first system for physically based, neural inverse rendering from multi-viewpoint videos of propagating light. Our approach relies on a time-resolved extension of neural radiance caching -- a technique that accelerates inverse…

Computer Vision and Pattern Recognition · Computer Science 2025-06-06 Anagh Malik , Benjamin Attal , Andrew Xie , Matthew O'Toole , David B. Lindell

Reduction of the critical current in narrow superconducting NbN lines with sharp and rounded bends with respect to the critical current in straight lines was studied at different temperatures. We compare our experimental results with the…

Superconductivity · Physics 2015-06-04 D. Henrich , P. Reichensperger , M. Hofherr , K. Ilin , M. Siegel , A. Semenov , A. Zotova , D. Yu. Vodolazov

We have studied supercurrent-assisted formation of the resistive state in nano-structured Nb and NbN superconducting films after absorption of a single photon. In amorphous narrow NbN strips the probability of the resistive state formation…

Superconductivity · Physics 2016-08-16 Alexei Semenov , Andreas Engel , Heinz-Wilhelm Hübers , Konstantin Ilin , Michael Siegel

We have shown that polarized neutron reflectometry can determine in a model-free way not only the mean magnetization of a ferromagnetic thin film at any point of a hysteresis cycle, but also the mean square dispersion of the magnetization…

Materials Science · Physics 2009-11-07 W. -T. Lee , S. G. E. te Velthuis , G. P. Felcher , F. Klose , T. Gredig , E. D. Dahlberg

We have studied photocurrent generation in large carbon nanotube (CNT) films using electrodes with different spacings. We observe that the photocurrent depends strongly on the position of illumination, with maximum observed response…

Mesoscale and Nanoscale Physics · Physics 2008-08-20 Christopher A. Merchant , Nina Markovic

The electrical conductivity of parallel plate capacitors, with ferroelectric lithium niobate as the dielectric layer, can be extensively and progressively modified by the controlled injection of conducting domain walls. Domain wall-based…

Mesoscale and Nanoscale Physics · Physics 2025-06-27 Conor J. McCluskey , James Dalzell , Amit Kumar , J. Marty Gregg

Present models of the superconducting-to-normal transition in transition-edge sensors (TESs) do not describe the current distribution within a biased TES. This distribution is complicated by normal-metal features that are integral to TES…

Superconductivity · Physics 2012-12-17 D. S. Swetz , D. A. Bennett , K. D. Irwin , D. R. Schmidt , J. N. Ullom