Publications (22)
Emergent magnetic state in (111)-oriented quasi-two-dimensional spinel oxides
Xiaoran Liu, B. J. Kirby, Zhicheng Zhong +8
We report on the emergent magnetic state of (111)-oriented CoCr2O4 ultrathin films sandwiched by Al2O3 in the quantum confined geometry. At the two-dimensional crossover, polarized…
Magnetism and electronic structure of YTiO thin films
Yanwei Cao, P. Shafer, Xiaoran Liu +6
High-quality (001)-oriented (pseudo-cubic notation) ferromagnetic YTiO thin films were epitaxially synthesized in a layer-by-layer way by pulsed laser deposition. Structural, m…
Direct detection of pure spin-current by x-ray pump-probe measurements
J. Li, L. R. Shelford, P. Shafer +8
By synchronizing a microwave waveform with the synchrotron x-ray pulses, we use the ferromagnetic resonance (FMR) of the Py (Ni81Fe19) layer in a Py/Cu/Cu75Mn25/Cu/Co multilayer to…
Coherent ac spin current transmission across an antiferromagnetic CoO insulator
Q. Li, M. Yang, C. Klewe +11
The recent discovery of spin-current transmission through antiferromagnetic (AFM) insulating materials opens up unprecedented opportunities for fundamental physics and spintronics…
Quantum spin liquids by geometric lattice design
Xiaoran Liu, T. Asaba, Qinghua Zhang +12
On a lattice composed of triangular plaquettes where antiferromagnetic exchange interactions between localized spins cannot be simultaneously satisfied, the system becomes geometri…
Direct experimental evidence of tunable charge transfer at the ferromagnetic interface
J. R. Paudel, M. Terilli, T. -C. Wu +11
Interfacial charge transfer in oxide heterostructures gives rise to a rich variety of electronic and magnetic phenomena. Designing heterostructures where one of the thin-film compo…
Interface-engineered hole doping in Sr2IrO4/LaNiO3 heterostructure
Fangdi Wen, Xiaoran Liu, Qinghua Zhang +9
The relativistic Mott insulator Sr2IrO4 driven by large spin-orbit interaction is known for the Jeff = 1/2 antiferromagnetic state which closely resembles the electronic structure…
Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering
D. Meyers, Ken Nakatsukasa, Sai Mu +19
We report the observation of multiple phonon satellite features in ultra thin superlattices of form SrIrO/SrTiO using resonant inelastic x-ray scattering. As the valu…
Anomalous orbital structure in a spinel-perovskite interface -AlO/SrTiO
Yanwei Cao, Xiaoran Liu, P. Shafer +8
In all archetypical reported (001)-oriented perovskite heterostructures, it has been deduced that the preferential occupation of two-dimensional electron gases is in-plane $d_\text…
Ultrafast terahertz field control of the emergent magnetic and electronic interactions at oxide interfaces
A. M. Derrico, M. Basini, V. Unikandanunni +13
Ultrafast electric-field control of emergent electronic and magnetic states at oxide interfaces offers exciting prospects for the development of new generations of energy-efficient…
Nature of the metal-insulator transition in few-unit-cell-thick LaNiO3 films
M. Golalikhani, Q. Lei, R. U. Chandrasena +13
The nature of the metal insulator transition in thin films and superlattices of LaNiO3 with only few unit cells in thickness remains elusive despite tremendous effort. Quantum conf…
Resolving interfacial charge transfer in titanate superlattices using resonant X-ray reflectometry
R. F. Need, P. B. Marshall, E. Weschke +6
Charge transfer in oxide heterostructures can be tuned to promote emergent interfacial states, and accordingly, has been the subject of intense study in recent years. However, acce…
Probing electronic and magnetic transitions of short periodic nickelate superlattices using synchrotron x-ray
S. Middey, Ranjan Kumar Patel, D. Meyers +6
Transition metal based oxide heterostructures exhibit diverse emergent phenomena e.g. two dimensional electron gas, superconductivity, non-collinear magnetic phase, ferroelectricit…
Anomalous orbital structure in two-dimensional titanium dichalcogenides
Banabir Pal, Yanwei Cao, Xiaoran Liu +6
Generally, lattice distortions play a key role in determining the ground states of materials. Although it is well known that trigonal distortions are generic to most two-dimensiona…
Observation of Coherently Coupled Cation Spin Dynamics in an Insulating Ferrimagnetic Oxide
C. Klewe, P. Shafer, J. E. Shoup +11
Many technologically useful magnetic oxides are ferrimagnetic insulators, which consist of chemically distinct cations. Here, we examine the spin dynamics of different magnetic cat…
Disentangled cooperative orderings in artificial rare-earth nickelates
S. Middey, D. Meyers, M. Kareev +7
Coupled transitions between distinct ordered phases are important aspects behind the rich phase complexity of correlated oxides that hinders our understanding of the underlying phe…
Magnetic interactions at the nanoscale in trilayer titanates LaTiO/SrTiO/YTiO
Yanwei Cao, Zhenzhong Yang, M. Kareev +10
We report on the phase diagram of competing magnetic interactions at nanoscale in engineered ultra-thin trilayer heterostructures of LaTiO/SrTiO/YTiO, in which th…
Depth-resolved profile of the interfacial ferromagnetism in superlattices
J. R. Paudel, A. Mansouri Tehrani, M. Terilli +10
Emergent magnetic phenomena at interfaces represent a frontier in materials science, pivotal for advancing technologies in spintronics and magnetic storage. In this letter, we util…
Electronic properties of ultra-thin YCrO3 films
Banabir Pal, Xiaoran Liu, Fangdi Wen +5
We report on the heteroepitaxial stabilization of YCrO3 ultra-thin films on LSAT (001) substrate. Using a combination of resonant X-ray absorption spectroscopy (XAS) and atomic mul…
Correlation-driven insulator-metal transition in near-ideal vanadium dioxide films
A. X. Gray, J. Jeong, N. P. Aetukuri +17
We use polarization- and temperature-dependent x-ray absorption spectroscopy, in combination with photoelectron microscopy, x-ray diffraction and electronic transport measurements,…
Emergent phase in short-periodic rare-earth nickelate superlattices
S. Middey, Ranjan Kumar Patel, D. Meyers +6
Heterostructure engineering provides an efficient way to obtain several unconventional phases of LaNiO3, which is otherwise paramagnetic, metallic in bulk form. In this work, a new…
Synthesis and electronic properties of Ruddlesden-Popper strontium iridate epitaxial thin films stabilized by control of growth kinetics
Xiaoran Liu, Yanwei Cao, B. Pal +7
We report on the selective fabrication of high-quality SrIrO and SrIrO epitaxial thin films from a single polycrystalline SrIrO target by pulsed laser depositio…