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Orbital polarization, charge transfer, and fluorescence in reduced valence nickelates
M. R. Norman, A. S. Botana, J. Karp +6
This paper presents a simple formalism for calculating X-ray absorption (XAS) and resonant inelastic x-ray scattering (RIXS) that has as input orbital-resolved density of states fr…
Absence of mixed valency for Pr in pristine and hole-doped PrNiO
Xingyu Liao, Michael R. Norman, Hyowon Park
Infinite-layer nickelates (NiO) exhibit some distinct differences as compared to cuprate superconductors, leading to a debate concerning the role of rare-earth ions (=La,…
Bootstrapped Dimensional Crossover of a Spin Density Wave
Anjana M. Samarakoon, J. Strempfer, Junjie Zhang +8
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…
Implications of second harmonic generation for hidden order in SrCuOCl
A. de la Torre, S. Di Matteo, D. Hsieh +1
SrCuOCl (SCOC) is a model undoped cuprate with crystallographic symmetry, and a simple magnetic space group with associated magnetic point group $mmm1…
Comparative Many-Body Study of PrNiO and NdNiO
Jonathan Karp, Alexander Hampel, Manuel Zingl +4
We study the many-body electronic structure of the stoichiometric and electron-doped trilayer nickelate PrNiO in comparison to that of the stoichiometric and hole-doped…
Anomalous mirror symmetry breaking in a model insulating cuprate SrCuOCl
A. de la Torre, K. L. Seyler, L. Zhao +8
Understanding the complex phase diagram of cuprate superconductors is an outstanding challenge. The most actively studied questions surround the nature of the pseudogap and strange…
Harnessing Interpretable and Unsupervised Machine Learning to Address Big Data from Modern X-ray Diffraction
Jordan Venderley, Michael Matty, Krishnanand Mallayya +14
The information content of crystalline materials becomes astronomical when collective electronic behavior and their fluctuations are taken into account. In the past decade, improve…
Intertwined density waves in a metallic nickelate
J. Zhang, D. Phelan, A. S. Botana +10
Nickelates are a rich class of materials, ranging from insulating magnets to superconductors. But for stoichiometric materials, insulating behavior is the norm, as for most late tr…
Observation of an antiferromagnetic quantum critical point in high-purity LaNiO
Changjiang Liu, Vincent F. C. Humbert, Terence Bretz-Sullivan +12
Amongst the rare-earth perovskite nickelates, LaNiO (LNO) is an exception. While the former have insulating and antiferromagnetic ground states, LNO remains metallic and non-ma…
Many-body Electronic Structure of NdNiO and CaCuO
Jonathan Karp, Antia S. Botana, Michael R. Norman +3
The demonstration of superconductivity in nickelate analogues of high cuprates provides new perspectives on the physics of correlated electron materials. The degree to which…
Crystal structure of the inversion-breaking metal Cd2Re2O7
M. R. Norman
Second harmonic generation (SHG) on the pyrochlore metal Cd2Re2O7 indicates the presence of three order parameters setting in below an inversion breaking transition. Here, we explo…
Evidence for a Parity Broken Monoclinic Ground State in the S = 1/2 Kagomé Antiferromagnet Herbertsmithite
N. J. Laurita, A. Ron, J. W. Han +9
Nearest-neighbor interacting S = 1/2 spins on the ideal Kagomé lattice are predicted to form a variety of novel quantum entangled states, including quantum spin-liquid (SL) and val…
Valence bond phases of herbertsmithite and related copper kagome materials
M. R. Norman, N. J. Laurita, D. Hsieh
Recent evidence from magnetic torque, electron spin resonance, and second harmonic generation indicate that the prototypical quantum spin liquid candidate, herbertsmithite, has a s…
Néel and stripe ordering from spin-orbital entanglement in -SrCrO
Z. H. Zhu, W. Hu, C. A. Occhialini +6
The rich phenomenology engendered by the coupling between the spin and orbital degrees of freedom has become appreciated as a key feature of many strongly-correlated electron syste…
Quantum Spin Liquids
C. Broholm, R. J. Cava, S. A. Kivelson +3
Spin liquids are quantum phases of matter that exhibit a variety of novel features associated with their topological character. These include various forms of fractionalization - e…
Electronic structure and magnetism of transition metal dihalides: bulk to monolayer
Antia S. Botana, Michael R. Norman
Based on first-principles calculations, the evolution of the electronic and magnetic properties of transition metal dihalides MX (M= V, Mn, Fe, Co, Ni; X = Cl, Br, I) is analyz…
Spin stripe order in a square planar trilayer nickelate
Junjie Zhang, D. M. Pajerowski, A. S. Botana +12
Trilayer nickelates, which exhibit a high degree of orbital polarization combined with an electron count (d8.67) corresponding to overdoped cuprates, have been identified as a prom…
Averievite: a copper oxide kagome antiferromagnet
A. S. Botana, H. Zheng, S. H. Lapidus +2
Averievite, CuVO(CsCl), is an oxide mineral composed of Cu kagome layers sandwiched by Cu-V honeycomb layers. We have synthesized this oxide and…
Copper Tellurium Oxides - A Playground for Magnetism
M. R. Norman
A variety of copper tellurium oxide minerals are known, and many of them exhibit either unusual forms of magnetism, or potentially novel spin liquid behavior. Here, I review a numb…
The nature of the tensor order in Cd2Re2O7
S. Di Matteo, M. R. Norman
The pyrochlore metal Cd2Re2O7 has been recently investigated by second-harmonic generation (SHG) reflectivity. In this paper, we develop a general formalism that allows for the ide…
Electron doped layered nickelates: spanning the phase diagram of the cuprates
Antia S. Botana, Victor Pardo, Michael R. Norman
PrNiO is an overdoped analog of hole-doped layered cuprates. Here we show via ab initio calculations that Ce-doped PrNiO (PrCeNiO) has the same…
Mimicking cuprates: large orbital polarization in a metallic square-planar nickelate
Junjie Zhang, A. S. Botana, J. W. Freeland +5
High temperature cuprate superconductivity remains a defining problem in condensed matter physics. Among myriad approaches to addressing this problem has been the study of alternat…
The magnetic ground state of Sr2IrO4 and implications for second-harmonic generation
S. Di Matteo, M. R. Norman
The currently accepted magnetic ground state of Sr2IrO4 (the -++- state) preserves inversion symmetry. This is at odds, though, with recent experiments that indicate a magnetoelect…
Correlated impurities and intrinsic spin liquid physics in the kagome material Herbertsmithite
Tian-Heng Han, M. R. Norman, J. -J. Wen +4
Low energy inelastic neutron scattering on single crystals of the kagome spin liquid compound ZnCu3(OD)6Cl2 (Herbertsmithite) reveals antiferromagnetic correlations between impurit…