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Physics

Condensed matter

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Displaying 201 - 225 of 2290

Visualizing Localized, Radiative Defects in GaAs Solar Cells

September 1, 2022
Author(s)
Behrang Hamadani, Margaret Stevens, Brianna Conrad, Matthew Lumb, Kenneth Schmieder
We have used a calibrated, wide-field hyperspectral imaging instrument to obtain absolute spectrally and spatially resolved photoluminescence images in high growth-rate, rear-junction GaAs solar cells from 300 K to 77 K. At the site of some localized

c-axis Transport in UTe2: Evidence of Three-Dimensional Conductivity Component

August 24, 2022
Author(s)
Yun S. Eo, Shouzheng Liu, Shanta Saha, Hyunsoo Kim, Sheng Ran, Jarryd A. Horn, Halyna Hodovanets, John Collini, Tristin Metz, Wesley T. Fuhrman, Andriy H. Nevidomskyy, Jonathan D. Denlinger, Nicholas Butch, Michael S. Fuhrer, L. A. Wray, Johnpierre Paglione
We study the temperature dependence of electrical resistivity for currents directed along all crystallographic axes of the spin-triplet superconductor UTe 2. We focus particularly on an accurate determination of the resistivity along the c-axis (ρ c) by

Megahertz-rate Ultrafast X-ray Scattering and Holographic Imaging at the European XFEL

August 23, 2022
Author(s)
Thomas J. Silva, Hans Nembach, Mark Keller, Justin Shaw, Nanna Hagstrom, michael schneider, Nico Kerber, Alexander Yaroslavtsev, Erick Parra, Eric Fullerton, Oleg Shpyrko, Christian Gutt, Hermann Durr, Ezio Iacocca, Roopali Kukreja, stefano Bonetti, Emmanuelle Jal
The advent of X-ray free-electron lasers (XFELs) has revolutionized fundamental science, from atomic to condensed matter physics, from chemistry to biology, giving researchers access to X-rays with unprecedented brightness, coherence, and pulse duration

Bootstrapped Dimensional Crossover of a Spin Density Wave

August 17, 2022
Author(s)
Anjana Samarakoon, J. Strempfer, Junjie Zhang, Feng Ye, Yiming Qiu, J.-W. Kim, H. Zheng, S. Rosenkranz, M. Norman, J. Mitchell, D. Phelan
Quantum materials display rich and myriad types of magnetic, electronic, and structural ordering, often with these ordering modes either competing with one another or 'intertwining,' that is, reinforcing one another. Low dimensional quantum materials

Connecting entropy scaling and density scaling

August 17, 2022
Author(s)
Ian Bell, Robin Fingerhut, Jadran Vrabec, Lorenzo Costigliola
It is shown that the residual entropy (entropy minus that of the ideal gas at the same temperature and density) is mostly synonymous with the independent variable of density scaling, identifying a direct link between these two approaches. The residual

Towards Understanding the Magnetic Properties of the Breathing Pyrochlore Compound Ba 3 Yb 2 Zn 5 O 11 through Single-Crystal Studies

August 10, 2022
Author(s)
Sachith Dissanayake, Zhenzhong Shi, Jeffrey Rau, Rabindranath Bag, William Steinhardt, Nicholas Butch, Matthias Frontzek, Andrey Podlesnyak, David Graf, Casey Marjerrison, Jue Liu, Michel J. Gingras, Sara Haravifard
Ba 3Yb 2Zn 5O 11 is unique among breathing pyrochlore compounds for being in the nearly-decoupled limit where inter-tetrahedra interactions are weak, hosting isolated clusters or molecular magnet like tetrahedra of magnetic ytterbium (Ybu3+^) ions. In this

Transport Properties of Few-Layer NbSe2: from Electronic Structure to Thermoelectric Properties

July 20, 2022
Author(s)
Tianhui Zhu, Peter Litwin, Md Golam Rosul, Devin Jessup, Md Sabbir Akhanda, Farjana Tonni, Sergiy Krylyuk, Albert Davydov, Petra Reinke, Stephen McDonnell, Mona Zebarjadi
4-layer NbSe2 is grown on SiO2 by molecular beam epitaxy. The in-situ X-ray photoelectron spectroscopy (XPS) measurements suggest a Nb-rich stoichiometry (Nb1+xSe2) likely due to intercalation of Nb atoms in between the NbSe2 layers. The metallic nature of

Magnetic-field sensitive charge density wave orders in the superconducting phase of UTe2

July 19, 2022
Author(s)
Anuva Aishwarya, Julian May-Mann, Arjun Raghavan, Laimei Nie, Marisa Romanelli, Sheng Ran, Shanta Saha, Johnpierre Paglione, Nicholas Butch, Eduardo Fradkin, Vidya Madhavan
The intense interest in triplet superconductivity partly stems from theoretical predictions of exotic excitations such as non-abelian Majorana modes, chiral supercurrents, and half-quantum vortices. However, fundamentally new, and unexpected states may

Topological Surface State Annihilation and Creation in SnTe/Crx(BiSb)2-xTe3 Heterostructures

July 19, 2022
Author(s)
Peng Deng, Alexander Grutter, Yulei Han, Megan E. Holtz, Peng Zhang, Patrick Quarterman, Shuaihang Pan, Shifei Qi, Zhenhua Qiao, Kang L. Wang
Topological surface states are a new class of electronic states with novel properties, including the potential for annihilation between surface states from two topological insulators at a common interface. Here, we report the annihilation and creation of
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