Anushika Athauda
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
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Anushika Athauda has a total of 15 co-authors. Here are the top co-authors by number of shared publications:
- Despina Louca
University of Virginia
2 shared publications Junjie Yang
Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
2 shared publicationsSeunghun Lee
Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
2 shared publications- Yoshikazu Mizuguchi
Tokyo Metropolitan University
2 shared publications Bing Li
University of Virginia
1 shared publicationChristina Hoffmann
Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
1 shared publication
Latest Publications
- 15 May 2017
- Published by Physical Society of Japan in Journal of the Physical Society of Japan
- Vol. 86 (5)
Ferro-Lattice-Distortions and Charge Fluctuations in Superconducting LaO1−xFxBiS2
Competing ferroelectric and charge density wave states have been proposed to exist in the electron–phonon coupled LaO1−xFxBiS2 superconductor. The lattice instability is proposed to arise from unstable phonon modes that can break the crystal symmetry. Using single crystal diffraction, a superlattice pattern is observed, that arises from coherent in-plane displacements of the sulfur atoms in the BiS2 superconducting planes. The distortions morph into coordinated ferro-distortive patterns with displacements in the x- and y-directions, that alternate along the c-axis. Diffuse scattering is observed along the (H0L) plane due to stacking faults but not along the (HH0) plane. The ferro-distortive pattern remains in the superconducting state upon fluorine doping, but the displacements are diminished in magnitude. Moreover, we find that the in-plane distortions give rise to disorder where the (00L) reflections become quite broad. It is possible that charge carriers can get trapped in the lattice deformations reducing the effective number of carriers available for pairing.
- 15 May 2017
- Published by Physical Society of Japan in Journal of the Physical Society of Japan
- Vol. 86 (5)
Ferro-Lattice-Distortions and Charge Fluctuations in Superconducting LaO1−xFxBiS2
Competing ferroelectric and charge density wave states have been proposed to exist in the electron–phonon coupled LaO1−xFxBiS2 superconductor. The lattice instability is proposed to arise from unstable phonon modes that can break the crystal symmetry. Using single crystal diffraction, a superlattice pattern is observed, that arises from coherent in-plane displacements of the sulfur atoms in the BiS2 superconducting planes. The distortions morph into coordinated ferro-distortive patterns with displacements in the x- and y-directions, that alternate along the c-axis. Diffuse scattering is observed along the (H0L) plane due to stacking faults but not along the (HH0) plane. The ferro-distortive pattern remains in the superconducting state upon fluorine doping, but the displacements are diminished in magnitude. Moreover, we find that the in-plane distortions give rise to disorder where the (00L) reflections become quite broad. It is possible that charge carriers can get trapped in the lattice deformations reducing the effective number of carriers available for pairing.
- Open Access
- 22 April 2015
- Published by American Physical Society (APS) in Physical Review B
- Vol. 91 (14) , 144112
In-plane charge fluctuations in bismuth-sulfide superconductors
The local atomic structure of the new nonmagnetic superconducting system is investigated using neutron diffraction and the pair density function analysis. Evidence for local charge fluctuations linked to a charge disproportionation of the Bi ions in the distorted lattice of superconducting is presented. In-plane short-range distortions of sulfur atoms up to 0.3 Å in magnitude break site symmetry and create two distinct environments around Bi. Out-of-plane motion of apical sulfur brings it closer to the La-O/F doping layer with increasing that may lead to a charge transfer conduit between the doping layers and the superconducting planes. The mechanism for superconductivity may arise from the interplay between charge density fluctuations and an enhanced spin-orbit coupling suggested theoretically that induces spin polarization.- 22 April 2015
- Published by American Physical Society (APS) in Physical Review B
- Vol. 91 (14) , 144112
Open AccessIn-plane charge fluctuations in bismuth-sulfide superconductors
The local atomic structure of the new nonmagnetic superconducting system is investigated using neutron diffraction and the pair density function analysis. Evidence for local charge fluctuations linked to a charge disproportionation of the Bi ions in the distorted lattice of superconducting is presented. In-plane short-range distortions of sulfur atoms up to 0.3 Å in magnitude break site symmetry and create two distinct environments around Bi. Out-of-plane motion of apical sulfur brings it closer to the La-O/F doping layer with increasing that may lead to a charge transfer conduit between the doping layers and the superconducting planes. The mechanism for superconductivity may arise from the interplay between charge density fluctuations and an enhanced spin-orbit coupling suggested theoretically that induces spin polarization. - 23 December 2014
- Published by Springer Nature in Journal of Superconductivity and Novel Magnetism
- Vol. 28 (4) , 1255-1259
The Crystal Structure of Superconducting LaO1−x F x BiS2
- 23 December 2014
- Published by Springer Nature in Journal of Superconductivity and Novel Magnetism
- Vol. 28 (4) , 1255-1259
The Crystal Structure of Superconducting LaO1−x F x BiS2