125 citations · 477 across the 14 of their papers we have counts for
14 papers
Phase Change Induced Magnetic Switching through Metal-insulator Transition in VO2/TbFeCo Films
Chung T. Ma, Salinporn Kittiwatnakul, Apiprach Sittipongpittaya +4
The ability to manipulate spins in magnetic materials is essential in designing spintronics devices. One method for magnetic switching is through strain. In VO2 on TiO2 thin films,…
Observation of weakened V-V dimers in the monoclinic metallic phase of strained VO2
J. Laverock, V. Jovic, A. A. Zakharov +6
Emergent order at mesoscopic length scales in condensed matter can provide fundamental insight into the underlying competing interactions and their relationship with the order para…
Surface morphology and superconductivity of Nb thin films by biased target ion beam deposition
Salinporn Kittiwatanakul, Nattawut Anuniwat, Nam Dao +2
One of many challenges for niobium (Nb) based superconducting devices is the improvement over the surface morphology and superconducting properties as well as the reduction of defe…
Ultrafast Electron-Lattice Coupling Dynamics in VO2 and V2O3 Thin Films
Elsa Abreu, Stephanie N. Gilbert Corder, Sun Jin Yun +11
Ultrafast optical pump - optical probe and optical pump - terahertz probe spectroscopy were performed on vanadium dioxide (VO2) and vanadium sesquioxide (V2O3) thin films over a wi…
Spin-torque switching in large size nano-magnet with perpendicular magnetic fields
Linqiang Luo, Mehdi Kabir, Nam Dao +5
DC current induced magnetization reversal and magnetization oscillation was observed in 500 nm large size Co90Fe10/Cu/Ni80Fe20 pillars. A perpendicular external field enhanced the…
Phase transition in bulk single crystals and thin films of VO2 by nano-infrared spectroscopy and imaging
Mengkun Liu, Aaron J. Sternbach, Martin Wagner +21
We have systematically studied a variety of vanadium dioxide (VO2) crystalline forms, including bulk single crystals and oriented thin films, using infrared (IR) near-field spectro…
Effect of inhomogeneities and substrate on the dynamics of the metal-insulator transition in VO thin films
M. Rodriguez-Vega, M. T. Simons, E. Radue +6
We study the thermal relaxation dynamics of VO films after the ultrafast photo-induced metal-insulator transition for two VO film samples grown on AlO and TiO s…
Direct Observation of Decoupled Structural and Electronic Transitions and an Ambient Pressure Monoclinic-Like Metallic Phase of VO
J. Laverock, S. Kittiwatanakul, A. A. Zakharov +5
We report the simultaneous measurement of the structural and electronic components of the metal-insulator transition of VO using electron and photoelectron spectroscopies and m…
Substrate-induced microstructure effects on the dynamics of the photo-induced Metal-insulator transition in VO thin films
E. Radue, L. Wang, S. Kittiwatanakul +5
We investigate the differences in the dynamics of the ultrafast photo-induced metal-insulator transition (MIT) of two VO thin films deposited on different substrates, TiO a…
Large epitaxial bi-axial strain induces a Mott-like phase transition in VO2
Salinporn Kittiwatanakul, Stuart A. Wolf, Jiwei Lu
The metal insulator transition (MIT) in VO2 has been an important topic for recent years. It has been generally agreed that the mechanism of the MIT in bulk VO2 is considered to be…
Transport behavior and electronic structure of phase pure VO2 thin films grown on c-plane sapphire under different O2 partial pressure
Salinporn Kittiwatanakul, Jude Laverock, Dave Newby +3
We grew highly textured phase pure VO2 thin films on c-plane Al2O3 substrates with different oxygen partial pressure. X-ray absorption and photoemission spectroscopy confirm the id…
Photoemission evidence for crossover from Peierls-like to Mott-like transition in highly strained VO
J. Laverock, A. R. H. Preston, D. Newby +8
We present a spectroscopic study that reveals that the metal-insulator transition of strained VO thin films may be driven towards a purely electronic transition, which does not…
Strain dependence of bonding and hybridization across the metal-insulator transition of VO2
J. Laverock, L. F. J. Piper, A. R. H. Preston +8
Soft x-ray spectroscopy is used to investigate the strain dependence of the metal-insulator transition of VO2. Changes in the strength of the V 3d - O 2p hybridization are observed…
VO2 nanosheets: controlling the THz properties through strain engineering
Elsa Abreu, Mengkun Liu, Jiwei Lu +5
We investigate far-infrared properties of strain engineered vanadium dioxide nanosheets through epitaxial growth on a (100)R TiO2 substrate. The nanosheets exhibit large uniaxial s…