News

[Hyungbin Lim, Jeongjae Lee and Takhee Lee] Mechanochemical synthesis and thin-film deposition of ze... Aug 1, 2023 l Hit 681

Metal-halide perovskites possess synthetic tunability in terms of their compositions and structures, which results in a facile control of the properties crucial for optoelectronic device applications. For instance, the optical bandgap of perovskites can be adjusted by means of halide compositions, which can generate a ...

[Younsik Kim, Dr. Soonsang Huh and Prof. Changyoung Kim] Kondo interaction in FeTe and its potential... Jul 13, 2023 l Hit 873

Finding d-electron heavy fermion states has been an important topic as the diversity in d-electron materials can lead to many exotic Kondo effect-related phenomena or new states of matter such as correlation-driven topological Kondo insulator. Yet, obtaining direct spectroscopic evidence for a d-electron heav...

[Yeahan Sur, Kwang-Tak Kim & Prof. Kee Hoon Kim] Optimized superconductivity in the vicinity of a ne... Jul 10, 2023 l Hit 979

CsV3Sb5 exhibits superconductivity at Tc=3.2 K after undergoing intriguing two high-temperature transitions: charge density wave order at ~98 K and electronic nematic order at Tnem~35 K. Here, we investigate nematic susceptibility in single crystals of Cs(V1-xTix)3Sb5 (x=0.00-0.06) where double-dome...

[Donghan Kim, Younsik Kim and Prof. Changyoung Kim] Electric control of Two-Dimensional Van Hove Sin... Mar 21, 2023 l Hit 1729

Divergent density of states (DOS) can induce extraordinary phenomena such as significant enhancement of superconductivity and unexpected phase transitions. Moreover, van Hove singularities (VHSs) lead to divergent DOS in two-dimensional (2D) systems. Despite recent interest in VHSs, only a few controllable cases have b...

[Eunho Song and Prof. Sungchul Hohng] Transcriptional pause extension benefits the stand-by rather t... Feb 17, 2023 l Hit 706

Transcriptional pause is essential for all types of termination. In this single-molecule study on bacterial Rho factor-dependent terminators, we confirm that the three Rho-dependent termination routes operate compatibly together in a single terminator, and discover that their termination efficiencies depend on the term...

[Moohyun Ahn, Prof. Byeongsu Yang and Prof. Jonghee Yoo] Searching for Invisible Axion Dark Matter w... Dec 5, 2022 l Hit 651

The axion has been postulated to solve the strong-CP problem in quantum chromodynamics, and it is a strong candidate for dark matter. Axion can couple to magnetic fields and convert to electromagnetic waves. Using this property, one can probe the dark matter axions. Our research team built a dark matter axion det...

[Kunihiro Yananose and Prof. Jaejun Yu] Growth of bilayer MoTe2 single crystals with strong non-line... Sep 21, 2022 l Hit 2110

The reduced symmetry in strong spin-orbit coupling materials such as transition metal ditellurides (TMDTs) gives rise to non-trivial topology, unique spin texture, and large charge-to-spin conversion efficiencies. Bilayer TMDTs are non-centrosymmetric and have unique topological properties compared to monolayer or tril...

[Kyeong-Yoon Baek, Dr. Jeongjae Lee, Prof. Tae-Woo Lee, Prof. Keehoon Kang & Prof. Takhee Lee] Mecha... Jul 25, 2022 l Hit 2583

Embedding metal–halide perovskite particles within an insulating host matrix has proven to be an effective strategy for revealing the outstanding luminescence properties of perovskites as an emerging class of light emitters. Particularly, unexpected bright green emission observed in a nominally pure zero-dimensio...

[KW An's Group] A photonic quantum engine driven by superradiance Jul 25, 2022 l Hit 3399

Performance of nano- and microscale heat engines can be improved with the help of quantum-mechanical phenomena. Recently, heat reservoirs with quantum coherence have been proposed to enhance engine performance beyond the Carnot limit even with a single reservoir. However, no physical realizations have been achieved so ...

[Jehyun Kim, Jonginn Yun, Wonjin Jang and Prof. Dohun Kim] Approaching Ideal Visibility in Singlet-T... Jul 21, 2022 l Hit 1636

We report energy-selective tunneling readout-based Hamiltonian parameter estimation of a two-electron spin qubit in a GaAs quantum dot array. Optimization of readout fidelity enables a single-shot measurement time of 16 μs on average, with adaptive initialization and efficient qubit frequency estimation based on rea...