News

[Daeho Yang, Seunghoon Oh, Junseok Han, Gibeom Son, Jinuk Kim and Kyungwon An] Realization of supera... Mar 8, 2021 l Hit 2573

Superabsorption refers to a 'super' version of absorption just like superradiance is a 'super' version of emission. In superabsorption, correlated atoms collectively absorb light. The light can be absorbed completely and the number of absorbed photons is proportional to the square of the number of atoms. Although super...

[Prof. Cheol-Hwan Park] Outstanding Referees of the American Physical Society Mar 3, 2021 l Hit 859

Professor Cheol-Hwan Park is selected and honored with the Outstanding Referee designation of the American Physical Society (APS). APS has selected 151 Outstanding Referees for 2021 who have demo...

[Sunghoon Kim, Joon-Hyuk Ko, Prof. Wonho Jhe ] Universal Theory of Dynamic Force Microscopy for Exac... Feb 25, 2021 l Hit 863

Force reconstruction in dynamic force microscopy (DFM) is a nontrivial problem that requires deconvolution of integrals. However, conventional reconstruction methods, which recover forces from single-frequency motion of the cantilever at its resonance, exhibit non-negligible error and reconstruction instability in the ...

[Seung Hun Lee, Hong Chul Choi, Prof. Bohm-Jung Yang] Odd-parity spin-triplet superconductivity in c... Feb 18, 2021 l Hit 832

We propose a route to achieve odd-parity spin-triplet (OPST) superconductivity in metallic collinear antiferromagnets with inversion symmetry. Owing to the existence of hidden antiunitary symmetry, which we call the effective time-reversal symmetry (eTRS), the Fermi surfaces of ordinary antiferromagnetic metals are gen...

[Keehoon Kang, Prof. Takhee Lee] Layer-by-Layer Structural Identification of 2D Ruddlesden–Popper Hy... Jan 28, 2021 l Hit 3064

Application of two-dimensional (2D) organic–inorganic hybrid halide perovskites in optoelectronic devices requires a detailed understanding of the local structural features including the Pb–I bonding in the 2D layers and the organic–inorganic interaction between the organic spacer molecules and the pe...

[Sangwoo Sim, Heejun Yang and Prof. Je-Geun Park] Sizable Suppression of Thermal Hall Effect upon Is... Jan 14, 2021 l Hit 834

We report measurements of the thermal Hall effect in single crystals of both pristine and isotopically substituted strontium titanate. We discovered a two orders of magnitude difference in the thermal Hall conductivity between SrTi16O3 and 18O-enriched SrTi18O3 samples. In most temperature ranges, the magnitude of ther...

[Minsu Kang and Prof. Heonsu Jeon] Submicron-scale pattern generation via maskless digital photolith... Dec 17, 2020 l Hit 842

Maskless photolithography based on the digital micromirror device (DMD), a two-dimensional micromirror array, is considered the next-generation low-cost lithographic technology. However, the DMD-based digital photolithography has been implemented only for micrometre-scale pattern generation, whereas sophisticated photo...

[S. Omkar, Y.S. Teo and H. Jeong] Resource-Efficient Topological Fault-Tolerant Quantum Computation ... Aug 10, 2020 l Hit 1070

We propose an all-linear-optical scheme to ballistically generate a cluster state for measurement-based topological fault-tolerant quantum computation using hybrid photonic qubits entangled in a continuous-discrete domain. Availability of near-deterministic Bell-state measurements on hybrid qubits is exploited for this...

Strain engineering of the magnetic multipole moments and anomalous Hall effect in pyrochlore iridate... Jul 22, 2020 l Hit 1591

The recent observation of the anomalous Hall effect (AHE) without notable magnetization in antiferromagnets has suggested that ferromagnetic ordering is not a necessary condition. Thus, recent theoretical studies have proposed that higher-rank magnetic multipoles formed by clusters of spins (cluster multipoles) can gen...

Coherent many-body exciton in van der Waals antiferromagnet NiPS3 Jul 22, 2020 l Hit 1080

Excitons are the composite particles of an electron-hole pair and rarely observed for many-body states with strong correlation. Here we show that a rare spin-orbital entangled exciton state appears below TN=150 K in NiPS3, an antiferromagnetic (AFM) van der Waals (vdW) material. It arises intrinsically from the archety...