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13 papers · 1 filter
Anomalous phonon dispersion near yielding in athermal crystals
Fumiaki Nakai, Michio Otsuki, Kuniyasu Saitoh +1
Vibrational properties of ordered athermal solids near yielding remain poorly understood. We show that yielding in a sheared crystal is governed not by a single localized instabili…
Degenerate Soft Modes and Selective Condensation in BaAlO via Inelastic X-ray Scattering
Yui Ishii, Arisa Yamamoto, Alfred Q. R. Baron +2
BaAlO is a ferroelectric material that exhibits structural quantum criticality through chemical composition tuning. Although theoretical calculations and several diffractio…
Characteristic ferroelectric domains and their dynamic behavior in ordered Pb(ScNb)O
Hiroshi Nakajima, Satoshi Hiroi, Hirofumi Tsukasaki +5
Pb-based perovskites with multiple cations are fascinating materials showing various phenomena such as high piezoelectric, electromechanical, and relaxor properties. While chemical…
Impact of in-plane disorders on the thermal conductivity of AgCrSe
Shota Izumi, Yui Ishii, Jinfeng Zhu +5
Superionic conductors have recently attracted renewed attention for their use as thermoelectric materials due to their extremely low lattice thermal conductivity. Of central intere…
Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor
Yuto Watanabe, Hiroto Arima, Saori Kawaguchi-Imada +10
We investigate the thermal expansion and superconducting properties of a CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform high-pressure synchrotron X-r…
Appearance of ferromagnetism in Pt(100) ultrathin films originated from quantum-well states
Tatsuru Yamada, Keisuke Ochiai, Hirofumi Kinoshita +5
Ferromagnetism was observed in a Pt(100) ultrathin film deposited on a SrTiO3(100) substrate. The ferromagnetism, which appears in films with thicknesses of 2.2-4.4 nm, periodicall…