News

[Dr. Tae-Yun Lee & Prof. Heonsu Jeon] Resonant cavity phosphor (Published in Nature Communications) Oct 25, 2023 l Hit 699

While phosphors play an immensely important role in solid-state lighting and full-colour displays, it has been noted lately that their performance can be largely improved via structural engineering. Here, phosphor material is synergistically merged with yet another structurally engineered platform, reson...

[Prof. Byeongsu Yang , Dr. Moohyun Ahn and Prof. Jonghee Yoo] Extended Axion Dark Matter Search Usin... Aug 28, 2023 l Hit 226

We report an extended search for the axion dark matter using the CAPP18T haloscope. The CAPP18T experiment adopts innovative technologies of a high-temperature superconducting magnet and a Josephson parametric converter. The total system noise temperature is ∼0.6 K. The scan frequency range is from 4.8077 to 4...

[Chaebin Kim, & Prof. Je-Geun Park] Bond-dependent anisotropy and magnon-decay in cobalt-based Kitae... Aug 28, 2023 l Hit 277

The Kitaev model, a honeycomb network of spins with bond-dependent anisotropic interactions, is a rare example of a system with a quantum spin liquid ground state. Although most Kitaev model candidate materials eventually order magnetically due to additional non-Kitaev interactions, their bond-dependent anisotropy mani...

[Young Kim and Prof. Changyoung Kim*] Growth and Electronic Structure of Copper Oxide Monolayer Epit... Aug 9, 2023 l Hit 282

Copper-based superconductors commonly have a CuO2 plane structure, where high-temperature superconductivity occurs. Due to these characteristics, extensive research has been conducted on whether high-temperature superconductivity can occur even in a single layer of the CuO2 plane. However, a pure CuO2 plane single laye...

[Hyungbin Lim, Jeongjae Lee and Takhee Lee] Mechanochemical synthesis and thin-film deposition of ze... Aug 1, 2023 l Hit 238

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 241

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 255

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 803

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 261

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 221

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...