352 citations · 910 across the 18 of their papers we have counts for
19 papers
Unique Charge-density-wave Order and Fluctuation-induced Phonon Softening in the Optimally-doped Trilayer Cuprate BiSrCaCuO
S. Nakata, K. Yamamoto, J. Okamoto +11
Charge-density-wave (CDW) order is a ubiquitous feature of cuprate superconductors that competes with superconductivity. However, its behavior remains poorly understood in trilayer…
Quantum critical behavior of cuprate superconductors observed by inelastic X-ray scattering
H. Y. Huang, C. Y. Mou, A. Singh +7
Progress toward a complete understanding of cuprate superconductors has been hindered by their intricate phase diagram, potentially linked to a quantum critical point (QCP). Howeve…
Non-reciprocal circular dichroism of axial phonons coupled to ferro-rotational order
H. Y. Huang, G. Channagowdra, D. Banerjee +10
Circular dichroism (CD) in X-ray absorption, defined as the difference in absorption between opposite circular polarizations, is fundamentally enabled by the breaking of time-rever…
Signatures of bi-altermagnetism revealed by sublattice-specific circular dichroism in resonant inelastic X-ray scattering
G. Channagowdra, A. Singh, H. Y. Huang +9
An altermagnet is a recently identified class of magnets that exhibit a zero net magnetic moment but break symmetry under the combined operations of parity and time reversal. It ty…
Bimagnon dispersion of La2CuO4 probed by resonant inelastic X-ray scattering
A. Singh, H. Y. Huang, K. Tsutsui +6
We report on the study of the magnetic excitations of Mott insulator La2CuO4 by using resonant inelastic x-ray scattering (RIXS) and cluster calculations within the framework of ex…
Exciton dynamics uncovering electron fractionalization in superconducting cuprates
A. Singh, H. Y. Huang, J. D. Xie +6
Electron quasiparticles play a crucial role in simplifying the description of many-body physics in solids with surprising success. Conventional Landau's Fermi-liquid and quasiparti…
Quantum fluctuations of charge order induce phonon softening in a superconducting cuprate
H. Y. Huang, A. Singh, C. Y. Mou +13
Quantum phase transitions play an important role in shaping the phase diagram of high-temperature cuprate superconductors. These cuprates possess intertwined orders which interact…
Development of the Soft X-ray AGM-AGS RIXS Beamline at Taiwan Photon Source
A. Singh, H. Y. Huang, Y. Y. Chu +18
We report on the development of a high-resolution and highly efficient beamline for soft-X-ray resonant inelastic X-ray scattering (RIXS) located at Taiwan Photon Source. This beam…
Evolution of valence-specific spin states and local distortions in LaSrCoO
J. Okamoto, A. Chainani, Z. Y. Chen +7
We present X-ray spectroscopic evidence for the evolution of valence-specific spin states and tetragonal distortions in single-layer cobaltates. Measurements of Co -edge reson…
Ordering of Fe and Zn ions and magnetic properties of FeZnMo3O8
S. V. Streltsov, D. -J. Huang, I. V. Solovyev +1
In the present paper electronic, magnetic, and structural properties of a novel system FeZnMoO with a polar crystal structure are investigated using GGA+U calculations. It…
Electronic structure of the parent compound of superconducting infinite-layer nickelates
M. Hepting, D. Li, C. J. Jia +22
The search for oxide materials with physical properties similar to the cuprate high Tc superconductors, but based on alternative transition metals such as nickel, has grown and evo…
Jahn-Teller distortion driven magnetic polarons in magnetite
H. Y. Huang, Z. Y. Chen, R. -P. Wang +11
The first known magnetic mineral, magnetite (FeO), has unusual properties which have fascinated mankind for centuries; it undergoes the Verwey transition at $\s…
Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates
H. Y. Huang, C. J. Jia, Z. Y. Chen +14
Measurements of spin excitations are essential for an understanding of spin-mediated pairing for superconductivity; and resonant inelastic X-ray scattering (RIXS) provides a consid…
Microscopic examinations of Co valences and spin states in electron-doped LaCoO
Keisuke Tomiyasu, Syun-Ichi Koyama, Masanori Watahiki +12
We studied the Co valences and spin states in electron-doped LaCoTeO by measuring x-ray absorption spectra and electron spin resonance. The low-temperature insula…
Photoemission and X-ray Absorption Studies of the Diluted Magnetic Semiconductor BaK(ZnMn)As Isostructural to Fe-based Superconductors
H. Suzuki, K. Zhao, G. Shibata +14
The electronic and magnetic properties of a new diluted magnetic semiconductor (DMS) BaK(ZnMn)As, which is isostructural to so-called 122-ty…
Observation of magnetically hard grain boundaries in double-perovskite SrFeMoO
Y. Takahashi, V. K. Verma, G. Shibata +12
Unusual low temperature magneto-resistance (MR) of ferromagnetic SrFeMoO polycrystals has been attributed to magnetically hard grain boundaries which act as spin valves…
Bulk and Surface Magnetization of Co atoms in Rutile Ti_[1-x]Co_xO_[2-delta] Thin Films Revealed by X-Ray Magnetic Circular Dichroism
V. R. Singh, Y. Sakamoto, T. Kataoka +10
We have studied magnetism in Ti_[1-x]Co_xO_[2-δ] thin films with various x and δby soft x-ray magnetic circular dichroism (XMCD) measurements at the Co L_[2,3] absorption edges. Th…
Electronic structure and magnetism of the diluted magnetic semiconductor Fe-doped ZnO nano-particles
T. Kataoka, M. Kobayashi, Y. Sakamoto +16
We have studied the electronic structure of ZnFeO nano-particles, which have been reported to show ferromagnetism at room temperature, by x-ray photoemission spectr…
Exchange Splitting and Charge Carrier Spin Polarization in EuO
P. G. Steeneken, L. H. Tjeng, I. Elfimov +4
High quality thin films of the ferromagnetic semiconductor EuO have been prepared and were studied using a new form of spin-resolved spectroscopy. We observed large changes in the…