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Physics

Condensed matter

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Displaying 1 - 25 of 1273

Measured and Theoretical K?-alpha X-Ray Emission Linewidths of U, Np, and Pu

September 10, 2026
Author(s)
Abigail Wessels, Jonathan William Dean, Daniel Becker, Douglas Bennett, Matthew Carpenter, Mark Croce, Joseph Fowler, Johnathon Gard, Paul Indelicato, Katrina Koehler, John Mates, Daniel McNeel, David Mercer, Daniel Schmidt, Katherine Schreiber, Daniel Swetz, Duc Vo, Sophie Weidenbenner, Joel Ullom
We present measurements of the K-alpha-1 and K-alpha-2 natural x-ray linewidths of uranium, neptunium, and plutonium (Z=92, 93, 94) obtained using a superconducting transition-edge sensor microcalorimeter array. The relative uncertainties range from 0.5%

X-ray Absorption and Resonant X-ray Emission at the Carbon Edge of Li$_2$CO$_3$

September 8, 2026
Author(s)
John Vinson, Terrence Jach, Rainer Unterumsberger, Michael Woodcox, Burkhard Beckhoff
While highly successful, density functional theory is known to have limitations owing to its neglect of many-body electron-electron interactions. This neglect leads to errors in the single-particle energies, leading to underestimated band gaps and band

Tunable inter-bilayer magnetic correlations and candidate multipolar physics in the van der Waals oxyhalides DyOCl, DyOBr, and DyOI

August 19, 2026
Author(s)
F. Brooks, X. Bai, J. Bacsa, M. B. Stone, S. Calder, Nicholas Butch, V. Garlea, M. Mourigal
Rare-earth van der Waals magnets provide a route to combining strong spin-orbit coupling, large magnetic moments, and reduced dimensionality in bulk crystals. We report a comparative study of the dysprosium oxy halides DyOX (X = Cl, Br, I), which realize

Understanding the Electronic Structure of Ruthenium Oxides during Redox Cycling with High Energy Resolution X-ray Absorption Spectroscopy

August 11, 2026
Author(s)
R. Soyoung Kim, Oscar Parades Mellone, John Vinson, Angel Garcia-Esparza, Mengxin Liu, Ikenna Chris-Okoro, Eric Zhao, Yiming Ding, Haoyi Li, Lei Zhang, Geoffroy Hautier, Tanja Cuk, Jin Suntivich, Dhananjay Kumar, Dimosthenis Sokaras, Junko Yano
Ruthenium oxides are essential catalysts and charge storage materials whose performance across reactions, from the oxygen evolution reaction to the chlor-alkali process, depends critically on reversible Ru redox cycling and the associated electronic

Comparative Analysis of Voltage Losses in Perovskite and GaAs Solar Cells at Low Temperatures

August 6, 2026
Author(s)
Hurriyet Yuce Cakir, Isaac Ogunniranye, Margaret A. Stevens, Matthew P. Lumb, Kenneth J. Schmieder, Susanna Thon, Zhaoning Song, Behrang Hamadani
This study presents a comparative analysis of the open circuit voltage behavior of perovskite vs. gallium arsenide (GaAs) solar cells at low temperatures relevant to space applications. While GaAs solar cells demonstrate high power conversion efficiencies

Defect states in the electronic structure of Ga2O3 transparent conductive oxides

June 23, 2026
Author(s)
Elizaveta Pyatenko, Constantin Wansorra, Ralph Steininger, John Vinson, Wolfram Witte, Dimitrios Hariskos, Michael Powalla, Clemens Heske, Lothar Weinhardt, Dirk Hauschild
Defect states are crucial in many electronic devices. Oxygen vacancies, for example, are common in transparent conductive oxides and can both be beneficial (e.g., as dopant to enhance conductivity) as well as detrimental (e.g., leading to reduced device

Analog quantum simulator of a quantum field theory with fermion-spin systems in silicon

May 29, 2026
Author(s)
Ali Rad, Alexander Schuckert, Eleanor Crane, Gautam Nambiar, Fan Fei, Jonathan Wyrick, Richard Silver, Mohammad Hafezi, Zohreh Davoudi, Michael Gullans
Simulating fermions coupled to large spin degrees of freedom represents a promising application for quantum simulators, given its relevance to lattice gauge theories. Mapping fermions to qubits is challenging in dimensions larger than one, complicating the

Thermal Transport in g-InSe: Bulk Single Crystals and Thin Flakes

May 5, 2026
Author(s)
Farjana Ferdous Tonni, Maliha Maliat, Md Sabbir Akhanda, Harsh Chandra, Ethan Scott, Abir Hasan, Sergiy Krylyuk, Nikhil Shukla, Costel Constantin, Patrick Hopkins, Junichiro Shiomi, Albert Davydov, Mona Zebarjadi
We measure the temperature-dependent in-plane thermal conductivity, jkðTÞ, of high-purity c-InSe bulk single crystals and exfoliated thin flakes (30–50 nm) from 50 to 300 K. Our bulk results agree with prior bulk reports and provide a reproducible

Controlling Phase Transition Dynamics in Laser-Printed Perovskite Films via Additive-Driven Strain Engineering

April 10, 2026
Author(s)
Hurriyet Yuce Cakir, Manikanta Makala, Ganga Neupane, Marielle Deconinck, Vladimir Shilovskikh, Xinyi Zhou, Rudolph Holley III, Quinn Burlingame, Yana Vaynzof, Yueh-Lin Loo, Behrang Hamadani, Oana Jurchescu
The structural phase transitions in hybrid perovskites are critical to their performance and stability, but controlling them remains a significant challenge. Here, we demonstrate that the dynamics of the low-temperature tetragonal-to-orthorhombic phase

A study of the position-dependent response of thermal kinetic inductance detectors through the use of cryogenic beam steering

April 2, 2026
Author(s)
Ian Fogarty Florang, Jonathan Dean, Joseph Fowler, Tom-Erik Haugen, Shannon Hoogerheide, Daniel Jardin, Hans Mumm, Nathan Nakamura, Matthew Natale, Galen O'Neil, Nathan Ortiz, Jeremy Paster, Thomas Rao, Avirup Roy, Daniel Swetz, Joel Ullom, Michael Vissers, Paul Szypryt
There are a number of considerations when designing a low-temperature detector for the best possible energy resolution. One that has been particularly challenging for thermal kinetic inductance detectors (TKIDs) is ensuring that the detector's response to

Imaginary gauge potentials in a non-Hermitian spin-orbit coupled quantum gas

March 17, 2026
Author(s)
Ian Spielman, Junheng Tao, Emmanuel Mercado Gutierrez, Mingshu Zhao
In 1996, Hatano and Nelson proposed a non-Hermitian lattice model containing an imaginary Peierls phase [Phys.Rev.Lett.\bf 77}570--573 (1996)], which subsequent analyses revealed to be an instance of a new class of topological systems. Here, we

Efficiently gate-tunable ferromagnetism in ferromagnetic semiconductor-Dirac semimetal p-n heterojunctions

March 6, 2026
Author(s)
Emma Steinebronn, Saurav Islam, Abhinava Chatterjee, Bimal Neupane, Alexander Grutter, Christopher Jensen, Julie Borchers, Timothy Charlton, Wilson J. Yanez-Parreno, Juan Chamorro, Tanya Berry, Supriya Ghosh, K. A. Nivedith, K. A. Mkhoyan, Tyrel McQueen, Yuanxi Wang, Chaoxing Liu, Nitin Samarth
We use molecular beam epitaxy to develop a gate tunable p-n heterojunction that interfaces a canonical Dirac semimetal, Cd3As2, and a ferromagnetic semiconductor, In1−xMnxAs, with perpendicular magnetic anisotropy. Measurements of the anomalous Hall effect

Localized quasiparticles in a quasi-two-dimensional fluxonium

February 21, 2026
Author(s)
Trevyn Larson, Sarah Jones, Tamas Kalmar, Pablo Aramburu Sanchez, Sai Pavan Chitta, Varun Verma, Kristen Genter, Katarina Cicak, Sae Woo Nam, Gergo Fulop, Jens Koch, Raymond Simmonds, Andras Gyenis
Disordered superconducting materials with high kinetic inductance are an important resource for generating nonlinearity in quantum circuits and creating high-impedance environments. In thin films fabricated from these materials, the combination of disorder

Magnetic field tuned magnetic order and metamagnetic criticality in nonstoichiometric CeAuBi2

February 20, 2026
Author(s)
Halyna Hodovanets, Hyunsoo Kim, Tristin Metz, Yasuyuki Nakajima, Christopher Eckbert, Kefeng Wang, Jie Yong, Shanta Saha, David Graf, Nicholas Butch, Thomas Vojta, Johnpierre Paglione
We present a detailed study of magnetization, resistivity, heat capacity, and x-ray and neutron powder diffraction measurements performed on single crystals of nonstoichiometric CeAuBi2, Au deficiency 18%, a strongly correlated antiferromagnet with Néel

Electrical interconnects for silicon spin qubits

February 2, 2026
Author(s)
Christopher White, Anthony Sigillito, Michael Gullans
Scalable spin qubit devices will likely require long-range qubit interconnects. We propose to create such an interconnect with a resistive topgate. The topgate is positively biased, to form a channel between the two dots; an end-to-end voltage difference

Realization of two-dimensional discrete time crystals with anisotropic Heisenberg coupling

January 28, 2026
Author(s)
Eric Switzer, Niall Robertson, Nathan Keenan, Angel Rodriguez, Andrea D'Urbano, Bibek Pokharel, Talat Rahman, Oles Shtanko, Sergiy Zhuk, Nicolas Lorente
A discrete time crystal (DTC) is an out-of-equilibrium phase of matter that spontaneously breaks discrete time-translation symmetry. Previous studies have been limited to a set of models with Ising-like couplings - and mostly only in one dimension - thus

Evolution from topological Dirac metal to flat-band-induced antiferromagnet in layered KxNi4S2 (0 ? x ? 1)

January 1, 2026
Author(s)
Hengdi Zhao, Xiuquan Zhou, Hyowon Park, Tianqi Deng, Brandon Wilfong, II Au, Samuel E. Pate, Craig Brown, Hui Wu, Tushar Bhowmick, Tessa McNamee, Ravhi Kumar, Yu-Sheng Chen, Zhi-Li Xiao, Russell Hemley, Weizhao Cai, Shanti Deemyad, Duck-Young Chung, Stephan Rosenkranz, Mercouri G. Kanatzidis
Dirac materials and flat-band systems, each possessing distinct electronic structures, have captivated a wide range of scientific communities for their potential to host diverse emerging phenomena. In particular, a tunable ground state featuring a Fermi

Topological Nodal Line and Weyl Magnons in the Non-Coplanar Antiferromagnet MnTe2

December 20, 2025
Author(s)
Angela Hight Walker, Thuc Mai, Kevin Garrity
Using a combination of band representation analysis, inelastic neutron scattering (INS), magneto-Raman spectroscopy measurements, and linear spin wave theory, we determine that the non-coplanar antiferromagnet MnTe2 hosts symmetry-protected topological
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