Complex oxides with 4 d and 5 d transition-metal ions recently emerged as a new paradigm
in correlated electron physics, due to the interplay between spin–orbit coupling and electron …

High-quality single crystals of NaYbSe 2, which resembles a perfect triangular-lattice
antiferromagnet without intrinsic disorder, are investigated by magnetization and specific …

In this review, we examine the latest experimental advances in materials science, focusing
primarily on 5d transition metal-based double perovskite oxides, particularly rhenium (Re) …

Polycrystalline samples of NaYbO 2 are investigated by bulk magnetization and specific-
heat measurements, as well as by nuclear magnetic resonance (NMR) and electron spin …

The Jahn-Teller effect is one of the most fundamental phenomena important not only for
physics but also for chemistry and material science. Solving the Jahn-Teller problem and …

Synchrotron x-ray-diffraction measurements on single crystals of the double perovskite B a 2
MgRe O 6 with 5 d 1 electronic configurations reveal the successive phase transitions from a …

Polarons and spin-orbit (SO) coupling are distinct quantum effects that play a critical role in
charge transport and spin-orbitronics. Polarons originate from strong electron-phonon …

Quantum materials with non-Kramers doublets are a fascinating venue to realize multipolar
hidden orders. Impurity probes which break point group symmetries, such as implanted …

The 5 d 1 ordered double perovskites present an exotic playground for studying novel
multipolar physics due to large spin-orbit coupling. We present Re L 3 edge resonant …

Spin-orbit coupling of as large as a half eV for electrons in 5 d orbitals often gives rise to the
formation of spin-orbital entangled objects, with the effective total angular momentum J eff …