Publications (13)
Topological Surface States and Superconductivity in [Tl](TlSn)Te Perovskites
K. E. Arpino, D. C. Wallace, Y. F. Nie +9
Materials with strong spin-orbit coupling have attracted attention following the prediction and subsequent discovery of strong two- and three-dimensional topological insulators in…
Multiferroic behavior confined by symmetry in EuTiO3 films
P. J. Ryan, G. E. Sterbinsky, Y. Choi +11
We have elucidated the spin, lattice, charge and orbital coupling mechanism underlying the multiferroic character in tensile strained EuTiO3 films. Symmetry determined by oxygen oc…
Dynamic nanoscale structural correlations in strontium ruthenate
M. SpaiÄ, R. Spieker, I. BiloniÄ +14
Strontium ruthenate (SrRuO, SRO) has been the subject of intense research as a model quasi-two-dimensional metal with strong electronic correlations and potential exotic mu…
First-order phase transition vs. spin-state quantum-critical scenarios in strain-tuned epitaxial cobaltite thin films
J. E. Dewey, V. Chaturvedi, T. A. Webb +12
Pr-containing perovskite cobaltites exhibit unusual valence transitions, coupled to coincident structural, spin-state, and metal-insulator transitions. Heteroepitaxial strain was r…
Coexistence and interaction of spinons and magnons in an antiferromagnet with alternating antiferromagnetic and ferromagnetic quantum spin chains
H. Zhang, Z. Zhao, D. Gautreau +10
In conventional quasi-one-dimensional antiferromagnets with quantum spins, magnetic excitations are carried by either magnons or spinons in different energy regimes: they do not co…
Magnetodielectric coupling and phonon properties of compressively strained EuTiO3 thin films deposited on LSAT
S. Kamba, V. Goian, M. Orlita +13
Compressively strained epitaxial (001) EuTiO3 thin films of tetragonal symmetry have been deposited on (001) (LaAlO3)_0.29-(SrAl_{1/2}Ta_{1/2}O3)_0.71 (LSAT) substrates by reactive…
Two-component electronic phase separation in the doped Mott insulator YCaTiO
S. Hameed, J. Joe, D. M. Gautreau +3
One of the major puzzles in condensed matter physics has been the observation of a Mott-insulating state away from half-filling. The filling-controlled Mott insulator-metal transit…
Structural control of magnetic anisotropy in a strain driven multiferroic EuTiO3 thin film
X. Ke, T. Birol, R. Misra +5
Octahedral distortion plays a key role in engineering the physical properties of heterostructures composed of perovskite oxides. We observe a strong in-plane uniaxial magnetic anis…
Reversible Control of Magnetic Interactions by Electric Field in a Single Phase Material
P. J. Ryan, J. -W. Kim, T. Birol +9
Intrinsic magnetoelectric coupling describes the interaction between magnetic and electric polarization through an inherent microscopic mechanism in a single phase material. This p…
Coherence lifetimes of excitations in an atomic condensate due to the thin spectrum
T. Birol, T. Dereli, Ã. E. MüstecaplıoÄlu +1
We study the quantum coherence properties of a finite sized atomic condensate using a toy-model and the thin spectrum model formalism. The decoherence time for a condensate in the…
Effect of random antiferromagnetic exchange on the spin waves in a three-dimensional Heisenberg ferromagnet
S. Hameed, Z. Wang, D. M. Gautreau +12
Neutron scattering is used to study spin waves in the three-dimensional Heisenberg ferromagnet YTiO, with spin-spin exchange disorder introduced La-substitution at the Y…
Prediction of Double-Weyl Points in the Iron-Based Superconductor CaKFeAs
N. Heinsdorf, M. H. Christensen, M. Iraola +6
Employing a combination of symmetry analysis, low-energy modeling, and ab initio simulations, we predict the presence of magnetic-field-induced Weyl points close to the Fermi level…
Uniaxial strain tuning of polar lattice vibrations in KTaO and SrTiO
I. Khayr, N. Somun, S. Hameed +11
The interplay of electronic and structural degrees of freedom is a prominent feature of many quantum materials and of particular interest in systems with strong ferroelectric fluct…