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Unconventional quantum states, most notably the two-dimensional (2D) superconductivity, have been realized at the interfaces of oxide heterostructures where they can be effectively tuned by the gate voltage ($V_G$). Here we report that the…

Superconductivity · Physics 2022-08-09 Xiangyu Hua , Fanbao Meng , Zongyao Huang , Zhaohang Li , Shuai Wang , Binghui Ge , Ziji Xiang , Xianhui Chen

The discovery of superconductivity at 80 K under high pressure in La$_3$Ni$_2$O$_7$ presents the groundbreaking confirmation that high-$T_c$ superconductivity is a property of strongly correlated materials beyond cuprates. We use density…

Superconductivity · Physics 2024-07-30 Zhen Fan , Jian-Feng Zhang , Bo Zhan , Dingshun Lv , Xing-Yu Jiang , Bruce Normand , Tao Xiang

We demonstrate that thermoelectric currents in superconducting bilayers with a spin-active interface are controlled by the two competing processes. On one hand, spin-sensitive quasiparticle scattering at such interface generates…

Superconductivity · Physics 2015-02-16 Mikhail S. Kalenkov , Andrei D. Zaikin

Interfaces between transition-metal oxides are able to host two-dimensional electron gases (2DEGs) and exhibit exotic quantum phenomena. Here we report the observation of superconductivity below 230 mK for the heterostructure composed of…

Superconductivity · Physics 2022-12-27 Haoran Wei , Shengru Chen , Yuting Zou , Yuxin Wang , Meng Yang , Qinghua Zhang , Lin Gu , Kun Jiang , Er-Jia Guo , Zhi Gang Cheng

Superconductivity mostly appears in high carrier density systems and sometimes exhibits common phase diagrams in which the critical temperature Tc continuously develops with carrier density. Superconductivity enhanced in lightly doped…

Superconductivity · Physics 2018-09-05 Yuji Nakagawa , Yu Saito , Tsutomu Nojima , Kei Inumaru , Shoji Yamanaka , Yuichi Kasahara , Yoshihiro Iwasa

052<p type="texpara" tag="Body Text" et="abstract" >The superconducting proximity effect is measured in sandwiches of thin Pb films and the alkali metals Cs, Rb, K and Na. The $T_{c}$-dependence provides information about the interface…

Superconductivity · Physics 2009-11-10 D. Garrett , M. Zhang , G. Bergmann

Interfaces dominate heat conduction in nanostructured systems, and much work has focused on methods to enhance interfacial conduction. These approaches generally address planar interfaces, where the heat flux vector is everywhere normal to…

Mesoscale and Nanoscale Physics · Physics 2017-02-21 Woosung Park , Aditya Sood , Joonsuk Park , Mehdi Asheghi , Robert Sinclair , Kenneth E. Goodson

In this letter, we have studied the effects of proximity of a superconductor to a normal metal. The system, represented by a bilayer attractive Hubbard model, is investigated using layer-dynamical mean field theory and iterated perturbation…

Superconductivity · Physics 2014-04-03 Naushad Ahmad Kamar , N. S. Vidhyadhiraja

An important route of engineering topological states and excitations is to combine superconductors (SC) with the quantum Hall (QH) effect, and over the past decade, significant progress has been made in this direction. While typical…

We report the superconducting properties of tantalum nitride (TaN) nanowires and TaN/copper (TaN/Cu) bilayer nanowires fabricated on 300 mm silicon wafers using CMOS-compatible processes. We evaluate how an integrated Cu heatsink modifies…

First-principles calculations for two twisted bismuth bilayers, each with 120 atoms, were studied by means of the electronic density of states and vibrational density of states. Metallic character at the Fermi level was found for the…

Synthesizing a polarizable environment surrounding a low-dimensional metal to generate superconductivity is a simple theoretical idea that still awaits a convincing experimental realization. The challenging requirements are satisfied in a…

Superconductivity · Physics 2018-09-26 Valla Fatemi , Jonathan Ruhman

The use of high pressure to realize superconductivity in the vicinity of room temperature has a long history, much of it focused on achieving this in hydrogen rich materials. This paper provides a brief overview of the work presented at…

Superconductivity · Physics 2019-06-11 Russell J. Hemley , Muhtar Ahart , Hanyu Liu , Maddury Somayazulu

Overheating is a critical bottleneck limiting the performance and reliability of next-generation high-power and high-frequency electronics. Interfacial thermal resistance constitutes a significant portion of the total thermal resistance. In…

Mesoscale and Nanoscale Physics · Physics 2026-02-17 Jinwen Liu , Zifeng Huang , Lina Yang , Yachao Zhang , Xingqiang Zhang , Kun Zhang , Xufei Guo , Yuxiang Wang , Hong Zhou , Jincheng Zhang , Wei Wang , Yue Hao , Zhe Cheng

The response of the worldwide scientific community to the discovery in 2008 of superconductivity at Tc = 26 K in the Fe-based compound LaFeAsO_{1-x}F_x has been very enthusiastic. In short order, other Fe-based superconductors with the same…

Superconductivity · Physics 2015-03-17 David C. Johnston

Heterostructure based interface engineering has been proved an effective method for finding new superconducting systems and raising superconductivity transition temperature (TC). In previous work on one unit-cell (UC) thick FeSe films on…

Carrier injection performed in oxygen-deficient YBa2Cu3O7(YBCO) hetero-structure junctions exhibited tunable resistance that was entirely different with behaviors of semiconductor devices. Tunable superconductivity in YBCO junctions,…

Superconductivity · Physics 2009-11-13 Yuansha Chen , Yan Zhang , Guijun Lian , Guangcheng Xiong

High temperature superconductivity is a property of doped antiferromagnetic insulators. The electronic structure is inhomogeneous on short length and time scales, and, as the temperature decreases, it evolves via two crossovers, before long…

Superconductivity · Physics 2009-10-30 V. J. Emery , S. A. Kivelson

To reach large-scale quantum computing, three-dimensional integration of scalable qubit arrays and their control electronics in multi-chip assemblies is promising. Within these assemblies, the use of superconducting interconnections, as…

In cuprates, a precursor state of superconductivity is speculated to exist above the critical temperature $\mathrm{T_C}$. Here we show via a combination of far-infrared ellipsometry and ultrafast broadband optical spectroscopy that…