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While topological superconductors are predicted to provide building blocks for fault-tolerant quantum computing, one of the remaining challenges is to find a convenient experimental platform that would allow patterning of circuits. We find…

Mesoscale and Nanoscale Physics · Physics 2016-10-28 Jerome T. Mlack , Atikur Rahman , Gopinath Danda , Natalia Drichko , Sarah Friedensen , Marija Drndic , Nina Markovic

We report a novel method to reduce the collector-emitter offset-voltage of the wide bandgap SiC-P-emitter lateral HBTs using a dual-bandgap emitter. In our approach, the collector-emitter offset-voltage VCE(offset) is reduced drastically by…

Mesoscale and Nanoscale Physics · Physics 2010-08-19 M. Jagadesh Kumar , C. Linga Reddy

We develop highly corrosion-resistant and conductive Ti-Nb-O coatings for metallic components -- bipolar plates (BPPs) and porous transport layers (PTLs) -- in PEM water electrolyzers. Using reactive high-power impulse magnetron sputtering…

The recently proposed Partition Theory (PT) [J.Phys.Chem.A 111, 2229 (2007)] is illustrated on a simple one-dimensional model of a heteronuclear diatomic molecule. It is shown that a sharp definition for the charge of molecular fragments…

Other Condensed Matter · Physics 2016-09-28 Morrel H. Cohen , Adam Wasserman , Roberto Car , Kieron Burke

We extend the density-functional theory for superconductors (SCDFT) to take account of the dynamical structure of the screened Coulomb interaction. We construct an exchange-correlation kernel in the SCDFT gap equation on the basis of the…

Superconductivity · Physics 2014-01-08 Ryosuke Akashi , Ryotaro Arita

Intramolecular symmetry-adapted perturbation theory (ISAPT) is a method to compute and decompose the noncovalent interaction energy between two molecular fragments A and B connected via a linker C. The existing ISAPT algorithm displays…

Chemical Physics · Physics 2022-09-13 Du Luu , Konrad Patkowski

We report on ambipolar gate-defined quantum dots in silicon on insulator (SOI) nanowires fabricated using a customised complementary metal-oxide-semiconductor (CMOS) process. The ambipolarity was achieved by extending a gate over an…

We design and demonstrate selective injection GaN heterojunction bipolar transistors that utilize a patterned base for selective injection of electrons from the emitter. The design maneuvers minority carrier injection through a thin p-GaN…

Applied Physics · Physics 2024-08-27 Zhanbo Xia , Chandan Joishi , Shahadat H. Sohel , Andy Xie , Edward Beam , Yu Cao , Siddharth Rajan

The influence of defect dipoles on the electrocaloric effect (ECE) in acceptor doped BaTiO$_3$ is studied by means of lattice-based Monte-Carlo simulations. A Ginzburg-Landau type effective Hamiltonian is used. Oxygen vacancy-acceptor…

Computational Physics · Physics 2016-10-05 Yang-Bin Ma , Anna Grünebohm , Kai-Christian Meyer , Karsten Albe , Bai-Xiang Xu

An optical injection scheme into the laser wakefield accelerator by preceding injection pulse is investigated by means of 3D numerical particle-in-cell simulations. Quasimonoenergetic hundred-pC electron bunches as short as 6 fs can be…

Plasma Physics · Physics 2020-03-06 Vojtěch Horný , Ondřej Klimo , Miroslav Krůs

We report on a stable form of pulsed electroluminescence in a dopant-free direct bandgap semiconductor heterostructure which we coin the tidal effect. Swapping an inducing gate voltage in an ambipolar field effect transistor allows incoming…

Mesoscale and Nanoscale Physics · Physics 2025-06-24 S. R. Harrigan , F. Sfigakis , L. Tian , N. Sherlekar , B. Cunard , M. C. Tam , H. -S. Kim , Z. Wasilewski , M. E. Reimer , J. Baugh

We report initial research to develop a compact and practical primary thermometer based on Doppler broadening thermometry (DBT). The DBT sensor uses an intrinsic property of thermalized atoms, namely, the Doppler width of a spectral line…

Atomic Physics · Physics 2025-01-29 Nicola Agnew , Graham Machin , Erling Riis , Aidan S. Arnold

We calculate the DC conductivity tensor of strongly coupled N=4 super-Yang-Mills (SYM) plasma in a presence of a strong external magnetic field B>>T^2 by using its gravity dual and employing both the RG flow approach and membrane paradigm…

High Energy Physics - Theory · Physics 2013-10-17 Kiminad A. Mamo

In the last two decades there have been tremendous attempts to built an adequate theory of high-temperature superconductivity. Most studies (including our efforts) used some model Hamiltonians with input parameters not directly related to…

Superconductivity · Physics 2015-05-27 A. S. Alexandrov

For a number of physical studies which are planned to be made with the next generation colliders, it is necessary to use polarized beams of both electrons and positrons. The problem of producing and acceleration of polarized electrons may…

Accelerator Physics · Physics 2007-05-23 A. P. Potylitsyn

The simulation of the instruments based on the cascade multiplication of electrons has always been an important and challenging subject in no matter high energy physics, astrophysics, radiography and other fields. In this work, a generic…

Instrumentation and Detectors · Physics 2023-10-10 Han Miao , Huaxing Peng , Baojun Yan , Shulin Liu , Hai-Bo Li

A single aperture Canted-Cosine-Theta (CCT) quadrupole magnet, made of NbTi superconductors, has been developed for the final focus region of the FCC-ee study. The conductor layout is optimised to mitigate edge effects on one of the two…

Accelerator Physics · Physics 2024-08-07 A. Thabuis , M. Koratzinos , G. Kirby , M. Liebsch , C. Petrone

We use the formerly derived explicit analytical expressions for the conductivity of nanostructured superconductors supercooled below the critical temperature in electric field. Computer simulations reveal that the negative differential…

Superconductivity · Physics 2020-06-26 Todor M. Mishonov , Victor I. Danchev , Ioulia Chikina , Albert M. Varonov

One-dimensional (1D) quantum systems are a cornerstone of many-body physics. However, their realization in solids has traditionally relied on top-down methods, which are limited by structural disorder and coarse confinement. Here, we…

High-Tc Type-II ceramic-superconductor at temperature T < Tc, under presence of magnetic-field B becomes non-superconducting if B exceeds a critical value Bc2. Thus at T < Tc, by application/absence of critical magnetic- field as a…

General Physics · Physics 2007-05-23 R. C. Gupta , Ruchi Gupta , Sanjay Gupta
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