71 citations · 468 across the 20 of their papers we have counts for
22 papers
Nanoscale magnetic ordering dynamics in a high Curie temperature ferromagnet
Yueh-Chun Wu, Gábor B. Halász, Joshua T. Damron +11
Thermally driven transitions between ferromagnetic and paramagnetic phases are characterized by critical behavior with divergent susceptibilities, long-range correlations, and spin…
Structural Anisotropy in Sb Thin Films
Pradip Adhikari, Anuradha Wijesinghe, Anjali Rathore +11
Sb thin films have attracted wide interests due to their tunable band structure, topological phases, and remarkable electronic properties. We successfully grow epitaxial Sb thin fi…
Honeycomb oxide heterostructure: a new platform for Kitaev quantum spin liquid
Baekjune Kang, Miju Park, Sehwan Song +11
Kitaev quantum spin liquid, massively quantum entangled states, is so scarce in nature that searching for new candidate systems remains a great challenge. Honeycomb heterostructure…
Tuning orbital-selective phase transitions in a two-dimensional Hund's correlated system
Eun Kyo Ko, Sungsoo Hahn, Changhee Sohn +12
Hund's rule coupling () has attracted much attention recently for its role in the description of the novel quantum phases of multi orbital materials. Depending on the o…
Reversibly controlled ternary polar states and ferroelectric bias promoted by boosting square-tensile-strain
Jun Han Lee, Nguyen Xuan Duong, Min-Hyoung Jung +23
Interaction between dipoles often emerges intriguing physical phenomena, such as exchange bias in the magnetic heterostructures and magnetoelectric effect in multiferroics, which l…
Preparation of large Cu3Sn single crystal by Czochralski method
Minsik Kong, Sang-Eon Park, Hye Jung Kim +13
Cu3Sn was recently predicted to host topological Dirac fermions, but related research is still in its infancy. The growth of large and high-quality Cu3Sn single crystals is, theref…
Correlated Oxide Dirac Semimetal in the Extreme Quantum Limit
Jong Mok Ok, Narayan Mohanta, Jie Zhang +17
Quantum materials (QMs) with strong correlation and non-trivial topology are indispensable to next-generation information and computing technologies. Exploitation of topological ba…
Pulsed-laser epitaxy of metallic delafossite PdCrO films
Jong Mok Ok, Matthew Brahlek, Woo Seok Choi +8
Alternate stacking of a highly conducting metallic layer with a magnetic triangular layer found in delafossite PdCrO2 provides an excellent platform for discovering intriguing corr…
Doped NiO: the Mottness of a charge transfer insulator
Friederike Wrobel, Hyowon Park, Changhee Sohn +9
The evolution of the electronic structures of strongly correlated insulators with doping has long been a central fundamental question in condensed matter physics; it is also of gre…
Reflection anisotropy experiments to study non-equilibrium dynamics of electronic nematicity
Inho Kwak, Jaeseok Son, Bumjoo Lee +4
Electronic nematicity have attracted a great deal of interest in the unconventional superconductivity research. We present an experimental method to investigate reflectivity anisot…
Competing Phases in Epitaxial Vanadium Dioxide at Nanoscale
Yogesh Sharma, Martin V. Holt, Nouamane Laanait +11
Phase competition in correlated oxides offers tantalizing opportunities as many intriguing physical phenomena occur near the phase transitions. Owing to a sharp metal-insulator tra…
Photoemission and Dynamical Mean Field Theory Study of Electronic Correlation in a Metal of SrRhO Thin Film
Yujun Zhang, Minjae Kim, Jernej Mravlje +8
Perovskite rhodates are characterized by intermediate strengths of both electronic correlation as well as spin-orbit coupling (SOC) and usually behave as moderately correlated meta…
Room-temperature ferromagnetic insulating state in highly cation-ordered epitaxial oxide double perovskite
Changhee Sohn, Elizabeth Skoropata, Yongseong Choi +9
Ferromagnetic insulators (FMIs) are one of the most important components in developing dissipationless electronic and spintronic devices. However, since ferromagnetism generally ac…
Stretching Epitaxial La0.6Sr0.4CoO3-δ for Fast Oxygen Reduction
Dongkyu Lee, Ryan Jacobs, Youngseok Jee +7
The slow kinetics of the oxygen reduction reaction (ORR) is one of the key challenges in developing high performance energy devices, such as solid oxide fuel cells. Straining a fil…
Strong spin-phonon coupling unveiled by coherent phonon oscillations in Ca2RuO4
Min-Cheol Lee, Choong H. Kim, Inho Kwak +8
We utilize near-infrared femtosecond pulses to investigate coherent phonon oscillations of Ca2RuO4. The coherent Ag phonon mode of the lowest frequency changes abruptly not only it…
Charge transfer in iridate-manganite superlattices
Satoshi Okamoto, John Nichols, Changhee Sohn +3
Charge transfer in superlattices consisting of SrIrO and SrMnO is investigated using density functional theory. Despite the nearly identical work function and non-polar int…
Electronic and magnetic properties of epitaxial SrRhO3 films
John Nichols, Simuck F. Yuk, Changhee Sohn +4
Strong interplay of fundamental order parameters in complex oxides are known to give rise to exotic physical phenomena. The 4d transition metal oxide SrRhO3 has generated much inte…
Room-temperature relaxor ferroelectricity and photovoltaic effects in SnTiOx/Si thin film heterostructures
Radhe Agarwal, Yogesh Sharma, Siliang Chang +8
We have studied ferroelectricity and photovoltaic effects in atomic layer deposited (ALD) 40-nm thick SnTiO films deposited directly onto p-type (001)Si substrate. These film…
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…
Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr3Ir2O7
H. J. Park, C. H. Sohn, D. W. Jeong +6
We examined the temperature (T) evolution of the optical conductivity spectra of SrIrO over a wide range of 10-400 K. The system was barely insulating, exhibiting a sma…
Temperature Evolution of Itinerant Ferromagnetism in SrRuO3 Probed by Optical Spectroscopy
D. W. Jeong, Hong Chul Choi, Choong H. Kim +12
The temperature () dependence of the optical conductivity spectra of a single crystal SrRuO thin film is studied over a range from 5 to 450 K. We observed signifi…
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…