8.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Asia Pacific Center for Theoretical PhysicsKR600 papers
- Institute for Basic ScienceKR238 papers
- Seoul National UniversityKR166 papers
- Korea Institute for Advanced StudyKR138 papers
- Korea Advanced Institute of Science and TechnologyKR103 papers
- Pohang Accelerator Laboratory91 papers
- Rutgers, The State University of New JerseyUS74 papers
- Lawrence Berkeley National LaboratoryUS67 papers
- Yonsei UniversityKR60 papers
- Korea UniversityKR57 papers
- Pusan National UniversityKR57 papers
- Sungkyunkwan UniversityKR57 papers
34 papers · 1 filter
On the origin of the hump structure in the in-plane optical conductivity of high Tc cuprates based on a SU(2) slave-boson theory
Jae-Hyeon Eom, Sung-Sik Lee, Ki-Seok Kim +1
An improved version of SU(2) slave-boson approach is applied to study the in-plane optical conductivity of the two dimensional systems of high Tc cuprates. We investigate the role…
Collective resonance modes of Josephson vortices in sandwiched stack of BiSrCaCuO intrinsic Josephson junctions
Myung-Ho Bae, Hu-Jong Lee
We observed splitting of the low-bias vortex-flow branch in a dense-Josephson-vortex state into multiple sub-branches in current-voltage characteristics of intrinsic Josephson junc…
Role of the superexchange interaction in magnetic transition and polaron crossover
Jayita Chatterjee, A. N. Das
The Hubbard-Holstein model is studied including double-exchange interaction and superexchange interaction using a variational phonon basis obtained through the modified Lang-Firsov…
Instability of planar vortices in two-dimensional easy-plane Heisenberg model with distance-dependent interactions
Myoung Won Cho, Seunghwan Kim
It is known that magnetic vortices in two dimensional Heisenberg models with easy-plane anisotropy exhibit an instability depending on the anisotropy strength. In this paper, we st…
Critical flux pinning and enhanced upper-critical-field in magnesium diboride films
M. N. Kunchur, C. Wu, D. H. Arcos +5
We have conducted pulsed transport measurements on c-axis oriented magnesium diboride films over the entire relevant ranges of magnetic field $0 \alt H \alt H_{c2}$ (where \hcu is…
Towards unified understanding of conductance of stretched monatomic contacts
H. -W. Lee, H. -S. Sim, D. -H. Kim +1
When monatomic contacts are stretched, their conductance behaves in qualitatively different ways depending on their constituent atomic elements. Under a single assumption of resona…
Pair-breaking and superconducting state recovery dynamics in MgB2
J. Demsar, R. D. Averitt, A. J. Taylor +5
We present studies of the photoexcited quasiparticle dynamics in MgB2 where, using femtosecond optical techniques, Cooper pair breaking dynamics (PBD) have been temporally resolved…
Different ocular dominance map formation by influence of orientation columns in visual cortices
Myoung Won Cho, Seunghwan Kim
In animal experiments, the observed orientation preference (OP) and ocular dominance (OD) columns in the visual cortex of the brain show various pattern types. Here, we show that t…
Evidence for the Coexistence of Anisotropic Superconducting Gap and Nonlocal Effects in the Non-magnetic Superconductor LuNi2B2C
Tuson Park, Elbert E. M. Chia, M. B. Salamon +7
A study of the dependence of the heat capacity Cp(alpha) on field angle in LuNi2B2C reveals an anomalous disorder effect. For pure samples, Cp(alpha) exhibits a fourfold variation…
Kinetic Roughening of Ion-Sputtered Pd(001) Surface: Beyond the Kuramoto-Sivashinsky Model
T. C. Kim, C. -M. Ghim, H. J. Kim +9
We investigate the kinetic roughening of Ar ion-sputtered Pd(001) surface both experimentally and theoretically. \textit{In situ} real-time x-ray reflectivity and \textit{in si…
Photoemission and x-ray absorption spectroscopy study of electron-doped colossal magnetoresistance manganite: La0.7Ce0.3MnO3 film
S. W. Han, J. -S. Kang, K. H. Kim +11
The electronic structure of La0.7Ce0.3MnO3 (LCeMO) thin film has been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Ce 3d core-le…
The geometry of quantum learning
Markus Hunziker, David A. Meyer, Jihun Park +2
Concept learning provides a natural framework in which to place the problems solved by the quantum algorithms of Bernstein-Vazirani and Grover. By combining the tools used in these…
Flat family of QFTs and quantization of d-algebras
Jae-Suk Park
Exploiting the path integral approach al la Batalin and Vilkovisky, we show that any anomaly-free Quantum Field Theory (QFT) comes with a family parametrized by certain moduli spac…
Coherent manipulation of electronic states in a double quantum dot
Toshiaki Hayashi, Toshimasa Fujisawa, Hai-Du Cheong +2
We investigate coherent time-evolution of charge states (pseudo-spin qubit) in a semiconductor double quantum dot. This fully-tunable qubit is manipulated with a high-speed voltage…
Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals
A. Rydh, U. Welp, A. E. Koshelev +11
The angular dependence of the upper critical field Hc2 of MgB2 single crystals is studied at various temperatures by means of specific heat and transport measurements in magnetic f…
Microwave distribution in stacked BiSrCaCuO intrinsic Josephson junctions in a transmission-line geometry
Myung-Ho Bae, Hu-Jong Lee
The microwave distribution inside a rectangular stack (15 m0.72 m60 nm) of BiSrCaCuO intrinsic Josephson junctions (IJJs) was studie…
Electronic structures of ZnCoO using photoemission and x-ray absorption spectroscopy
S. C. Wi, J. -S. Kang, J. H. Kim +12
Electronic structures of ZnCoO have been investigated using photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). The Co 3d states are found to lie…
Electronic structures of UTSn (T=Ni, Pd) using photoemission spectroscopy
J. -S. Kang, S. C. Wi, J. H. Kim +4
The electronic structures of the localized systems UTSn (T=Ni, Pd) have been investigated using photoemission spectroscopy (PES). The extracted U PES spectra of UTSn (T=N…
Boundary States in IIA Plane-Wave Background
Yeonjung Kim, Jaemo Park
We work out boundary states for Type IIA string theory on a plane wave background. By directly utilizing the channel duality, the induced conditions from the open string boundary c…
Surface Contribution to the Superconducting Properties of MgB2 Single Crystals
A. Rydh, U. Welp, J. M. Hiller +8
We demonstrate direct evidence of possible surface superconductivity on small, well-shaped MgB2 single crystals. Transport measurements in the range H < 1.6 Hc2^c, where Hc2^c is t…
Anisotropies of the lower and upper critical fields in MgB single crystals
L. Lyard, P. Szabo, T. Klein +6
The temperature dependence of the London penetration depth () and coherence length () has been deduced from Hall probe magnetization measurements in high quality MgB sing…
Electronic structures and ferromagnetism in transition metals codoped ZnO
Min Sik Park, B. I. Min
We have investigated electronic structures and magnetic properties of potential ZnO based diluted magnetic semiconductors: (Fe, Co) and (Fe, Cu) codoped ZnO. The origins of ferroma…
Specific Heat Study of the Magnetic Superconductor HoNi2B2C
Tuson Park, M. B. Salamon, Eun Mi Choi +2
The complex magnetic transitions and superconductivity of HoNi2B2C were studied via the dependence of the heat capacity on temperature and in-plane field angle. We provide an exten…
Bulk Evidence for s-Wave Pairing Symmetry in the n-Type Infinite-Layer Cuprate
Z. Y. Liu, H. H. Wen, L. Shan +6
Low temperature specific heat of the electron-doped (n-type) infinite-layer cuprate has been measured. The quasiparticle density of states (DOS) in the mi…