49 citations · 195 across the 9 of their papers we have counts for
9 papers
Direct visualization and control of SrOx segregation on semiconducting Nb doped SrTiO3 (100) surface
Hyang Keun Yoo, Daniel Schwarz, Soren Ulstrup +6
We investigated how SrOx segregates on a Nb doped SrTiO3 (100) surface by in air annealing. Using atomic force and photoemission electron microscopes, we can directly visualize the…
In situ investigation of conducting interface formation in LaAlO3/SrTiO3 heterostructure
Hyang Keun Yoo, Luca Moreschini, Aaron Bostwick +4
The high-mobility conducting interface (CI) between LaAlO_{3}(LAO) and SrTiO_{3}(STO) has revealed many fascinating phenomena, including exotic magnetism and superconductivity. But…
Enhanced tunability of two-dimensional electron gas on SrTiO3 through heterostructuring
Hyang Keun Yoo, Luca Moreschini, Andrew L. Walter +4
Two-dimensional electron gases (2DEGs) on the SrTiO3 (STO) surface or in STO-based heterostructures have exhibited many intriguing phenomena, which are strongly dependent on the 2D…
Spatially Resolved Electronic Properties of Single-Layer WS on Transition Metal Oxides
Søren Ulstrup, Jyoti Katoch, Roland J. Koch +10
There is a substantial interest in the heterostructures of semiconducting transition metal dichalcogenides (TMDCs) amongst each other or with arbitrary materials, through which the…
Polaron transport and thermoelectric behavior in La-doped SrTiO3 thin films with elemental vacancies
Woo Seok Choi, Hyang Keun Yoo, Hiromichi Ohta
Electrodynamic properties of La-doped SrTiO3 thin films with controlled elemental vacancies have been investigated using optical spectroscopy and thermopower measurement. In partic…
Latent Instabilities in Metallic LaNiO3 Films by Strain Control of Fermi-Surface Topology
Hyang Keun Yoo, Seung Ill Hyun, Luca Moreschini +10
Strain control is one of the most promising avenues to search for new emergent phenomena in transition-metal-oxide films. Here, we investigate the strain-induced changes of electro…
Dimensional crossover of the electronic structure in LaNiO3 ultrathin films: Orbital reconstruction, Fermi surface nesting, and the origin of the metal-insulator transition
Hyang Keun Yoo, Seung Ill Hyun, Luca Moreschini +9
Dimensionality control in the LaNiO3 (LNO) heterostructure has attracted attention due to its two-dimensional (2D) electronic structure was predicted to have an orbital ordered ins…
Stabilizing the forming process in unipolar resistance switching using an improved compliance current limiter
S. B. Lee, S. H. Chang, H. K. Yoo +1
The high reset current IR in unipolar resistance switching now poses major obstacles to practical applications in memory devices. In particular, the first IR-value after the formin…
Reduction of high reset currents in unipolar resistance switching Pt/SrTiOx/Pt capacitors using acceptor doping
S. B. Lee, A. Kim, J. S. Lee +7
The high reset current, IR, in unipolar resistance switching is an important issue which should be resolved for practical applications in nonvolatile memories. We showed that,durin…