137 citations · 511 across the 13 of their papers we have counts for
13 papers
Enhanced piezoelectric response at nanoscale vortex structures in ferroelectrics
Xiaowen Shi, Nimish Prashant Nazirkar, Ravi Kashikar +13
The piezoelectric response is a measure of the sensitivity of a material's polarization to stress or its strain to an applied field. Using in-operando x-ray Bragg coherent diffract…
Resonant inelastic x-ray scattering study of electronic excitations in insulating KFeSe
H. Gretarsson, T. Nomura, I. Jarrige +9
We report an Fe -edge resonant inelastic X-ray scattering (RIXS) study of KFeSe. This material is an insulator, unlike many parent compounds of iron-based…
Coexistence and competition of multiple charge-density-wave orders in rare-earth tri-telluride RTe3
B. F. Hu, B. Cheng, R. H. Yuan +2
The occurrences of collective quantum states, such as superconductivity (SC) and charge- or spin-densitywaves (CDWs or SDWs), are among the most fascinating phenomena in solids. To…
Continuous magnetic phase transition in half-frustrated Ca2Os2O7
P. Zheng, Y. G. Shi, Q. S. Wu +8
We present the specific heat, magnetization, optical spectroscopy measurements and the firstprinciple calculations on the Weberite structure Ca2Os2O7 single crystal/polycrystalline…
Structural phase transition below 250 K in superconducting KFeSe
A. Ignatov, A. Kumar, P. Lubik +5
Vibrational properties of iron-chalcogenide superconductor KFeSe with 30 K have been measured by Raman and optical spectroscopies over temperatu…
Two successive field-induced spin-flop transitions in single-crystalline CaCoAs
B. Cheng, B. F. Hu, R. H. Yuan +8
CaCoAs, a ThCrSi-structure compound, undergoes an antiferromagnetic transition at \emph{T}=76K with the magnetic moments being aligned parallel to the…
Optical study of the multiple charge density wave transitions in ErTe
B. F. Hu, B. Cheng, R. H. Yuan +7
We present an optical spectroscopy study on singe crystalline ErTe, a rare-earth-element tri-telluride which experiences two successive charge density wave (CDW) transitions at…
Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy
H. Gretarsson, A. Lupascu, Jungho Kim +18
We report Fe K beta x-ray emission spectroscopy study of local magnetic moments in various iron based superconductors in their paramagnetic phases. Local magnetic moments are found…
High energy pseudogap and its evolution with doping in Fe-based superconductors as revealed by optical spectroscopy
N. L. Wang, W. Z. Hu, Z. G. Chen +4
We report optical spectroscopic measurements on electron- and hole-doped BaFe2As2. We show that the compounds in the normal state are not simple metals. The optical conductivity sp…
Infrared spectrum and its implications for the electronic structure of the semiconducting iron selenide KFeSe
Z. G. Chen, R. H. Yuan, T. Dong +7
We report an infrared spectroscopy study on KFeSe, a semiconducting parent compound of the new iron-selenide system. The major spectral features are found to…
Optical spectroscopy study on CeTe: evidence for multiple charge-density-wave orders
B. F. Hu, P. Zheng, R. H. Yuan +4
We performed optical spectroscopy measurement on single crystal of CeTe, a rare-earth element tri-telluride charge density wave (CDW) compound. The optical spectra are found to…
Formation of partial energy gap below the structural phase transition and the rare-earth element substitution effect on infrared phonons in ReFeAsO (Re=La, Nd, and Sm)
T. Dong, Z. G. Chen, R. H. Yuan +3
Single crystals of LaFeAsO, NdFeAsO, and SmFeAsO have been prepared by means of a NaAs flux growth technique and studied by optical spectroscopy measurements. We show that the spec…
Optical spectroscopy study on single crystalline LaFeAsO
Z. G. Chen, R. H. Yuan, T. Dong +1
Millimeter-sized single crystals of LaFeAsO were grown from NaAs flux and the in-plane optical properties were studied over a wide frequency range. A sizable electronic correlation…