[HTML][HTML] Quantum-critical scale invariance in a transition metal alloy

Y Nakajima, T Metz, C Eckberg, K Kirshenbaum… - Communications …, 2020 - nature.com
Quantum-mechanical fluctuations between competing phases induce exotic collective
excitations that exhibit anomalous behavior in transport and thermodynamic properties, and …

Antiferromagnetism in semiconducting and single crystals

NS Sangeetha, V Smetana, AV Mudring, DC Johnston - Physical Review B, 2018 - APS
Crystals of SrMn 2 Sb 2 and BaMn 2 Sb 2 were grown using Sn flux and characterized by
powder and single-crystal x-ray diffraction, respectively, and by single-crystal electrical …

Competing magnetic fluctuations in iron pnictide superconductors: role of ferromagnetic spin correlations revealed by NMR

P Wiecki, B Roy, DC Johnston, SL Bud'ko… - Physical Review Letters, 2015 - APS
In the iron pnictide superconductors, theoretical calculations have consistently shown
enhancements of the static magnetic susceptibility at both the stripe-type antiferromagnetic …

Frustrated magnetism in the tetragonal CoSe analog of superconducting FeSe

B Wilfong, X Zhou, H Vivanco, DJ Campbell, K Wang… - Physical Review B, 2018 - APS
Recently synthesized metastable tetragonal CoSe, isostructural to the FeSe superconductor,
offers a new avenue for investigating systems in close proximity to the iron-based …

Non-Fermi-liquid types of behavior associated with a magnetic quantum critical point in single crystals

NS Sangeetha, LL Wang, AV Smirnov, V Smetana… - Physical Review B, 2019 - APS
The compound SrCo 2 As 2 with the body-centered tetragonal ThCr 2 Si 2 structure is known
to remain paramagnetic down to a temperature T= 0.05 K, but inelastic neutron scattering …

Strong magnetic correlations to 900 K in single crystals of the trigonal antiferromagnetic insulators and

NS Sangeetha, A Pandey, ZA Benson, DC Johnston - Physical Review B, 2016 - APS
Crystallographic, electronic transport, thermal, and magnetic properties are reported for
SrMn 2 As 2 and CaMn 2 As 2 single crystals grown using Sn flux. Rietveld refinements of …

Enhanced moments of Eu in single crystals of the metallic helical antiferromagnet

NS Sangeetha, VK Anand, E Cuervo-Reyes… - Physical Review B, 2018 - APS
The compound EuCo 2− y As 2 with the tetragonal ThCr 2 Si 2 structure is known to contain
Eu+ 2 ions with spin S= 7 2 that order below a temperature TN≈ 47 K into an …

Coexistence of antiferromagnetic and ferromagnetic spin correlations in revealed by and NMR

P Wiecki, V Ogloblichev, A Pandey, DC Johnston… - Physical Review B, 2015 - APS
In nonsuperconducting, metallic paramagnetic SrCo 2 As 2, inelastic neutron scattering
measurements have revealed strong stripe-type q=(π, 0) antiferromagnetic (AFM) spin …

: Highest magnetic ordering temperature 122-pnictide compound

BS Jacobs, A Pandey - Physical Review Materials, 2023 - APS
We report the growth of high-quality single crystals of ThCr 2 Si 2-type tetragonal BaMn 2 P
2 and investigation of its structural, electrical transport, thermal, and magnetic properties …

Electronic structure and spin dynamics of

H Mao, Z Yin - Physical Review B, 2018 - APS
The electronic structures, charge, and spin dynamics of the cobalt pnictide compounds AC o
2 A s 2 (A= Ba, Sr, Ca) in the paramagnetic state are investigated by using density functional …