Publications.

2025 · 1

Method for rapid estimation of the energy-time covariance matrix of single electrons

Wanki Park†, Chanuk Yang, Young-Seok Ghee, Hyung Kook Choi, Bum-Kyu Kim, Myung-Ho Bae† · Applied Physics Letters 127, 203503 (2025)

2025 · 2

Multiscale analysis of oxidative damage in hair fibers: From AFM nanomechanics to AI-based degradation modeling

Seungwon Choi*, Jaehoon Sah*, Sooyeon Ra*, Chanuk Yang*, Jae-Hyun Lee, Taegeun Song†, Myunglae Jo†, Hyung Kook Choi†, Sangmin An† · VIEW, 20250079 (2025)

2025 · 3

Thermomechanical modeling of bubble migration under local laser heating in van der Waals heterostructures

Soobeom Choi*, Hyejeong Jeong*, ChanSoo Kim, Hyungkook Choi†, Myunglae Jo† · JKPS 87, 378 (2025)

2025 · 4

Strong electron-occupancy dependence of the lever arm in few-electron quantum dot systems

Uhjin Kim, Seokyeong Lee, Myunglae Jo, Hyung Kook Choi† · JKPS 87, 67 (2025)

2025 · 5

Photoresist-Based Evaluation of Ultraviolet Exposure under Yellow Lighting in Academic Cleanrooms

Junghyun Pyun*, Soobeom Choi*, Changhan Son, Hyungkwang Lim, Hyungkook Choi†, Myunglae Jo† · Appl. Sci. Converg. Technol. 34, 123 (2025)

2025 · 6

Nanoscale Young’s modulus and resistivity of flexible Au films on PET substrates revealed by atomic force microscopy

Gwang-Myeong Kim*, Sooyeon Ra*, Chanuk Yang*, Jae-Hyun Lee, Myunglae Jo†, Hyungkook Choi†, Sangmin An† · Applied Surface Science 695, 162921 (2025)

2025 · 7

Controlling structural phases of Sn through lattice engineering

Chandima Kasun Edirisinghe*, Anjali Rathore*, Taegeon Lee, Daekwon Lee, An-Hsi Chen, Garrett Baucom, Eitan Hershkovitz, Anuradha Wijesinghe, Pradip Adhikari, Sinchul Yeom, Hong Seok Lee, Hyung-Kook Choi, Hyunsoo Kim, Mina Yoon, Honggyu Kim, Matthew Brahlek, Heesuk Rho, Joon Sue Lee† · Physical Review Materials 9, 024202 (2025)

2025 · 8

Development of a Quartz Tuning Fork-atomic Force Microscope Combined with Scanning Electron Microscope

Jaehoon Sah, Hyungkook Choi†, Sangmin An† · New Physics: Sae Mulli 75, 180 (2025)

2025 · 9

Effective tuning methods for few-electron regime in gate-defined quantum dots

Chanuk Yang*, Hwanchul Jung*, Hyung Kook Choi†, Yunchul Chung† · JKPS 86, 106 (2025)

2024 · 10

Channel-resolved wavefunctions of transverse magnetic focusing

Seokyeong Lee*, Dongsung T. Park*, Uhjin Kim, Hwanchul Jung, Yunchul Chung†, Hyoungsoon Choi†, Hyung Kook Choi† · Communications Physics 7: 418 (2024)

2023 · 11

Observation of Electronic Modes in Open Cavity Resonator

Hwanchul Jung*, Dongsung T. Park*, Seokyeong Lee, Uhjin Kim, Chanuk Yang, Jehyun Kim, V. Umansky, Dohun Kim, H.-S. Sim, Yunchul Chung†, Hyoungsoon Choi†, Hyung Kook Choi† · Nature Communications 14, 415 (2023)

2023 · 12

Cryogenic transimpedance amplifier based on a commercial operational amplifier

Chanuk Yang*, Inan Choi*, Hwanchul Jung, Dongsung T. Park, Hyung Kook Choi†, Yunchul Chung† · JKPS 83, 549 (2023)

2022 · 13

One-Lead Single-Electron Source with Charging Energy

Sung Un Cho, Wanki Park, Bum-Kyu Kim, Minky Seo, Dongsung T. Park, Hyungkook Choi, Nam Kim, H.-S. Sim and Myung-Ho Bae · Nano Letters 22, 9313 (2022)

2021 · 14

Significant energy relaxation of quantum dot emitted hot electrons

Dongsung T. Park, Uhjin Kim, Dongkun Kim, Hwanchul Jung, Juho Choi, Cheolhee Han, Yunchul Chung, H.-S. Sim, V. Umansky, Hyoungsoon Choi† and Hyung Kook Choi† · Physical Review Research 3, 033015 (2021)

2020 · 15

Robust quantum point contact via trench gate modulation

Dongsung T. Park, Seokyeong Lee, Uhjin Kim, Hyoungsoon Choi, Hyung Kook Choi† · Scientific Reports 10, 19746 (2020)

2020 · 16

Semiclassical Broadening in Quantum Dot Thermometry

Uhjin Kim, Hyung Kook Choi†, Dongsung T. Park† · JKPS 77, 489 (2020)

2020 · 17

One-Dimensional Poisson Calculation for Electrically Controlled Band Bending in GaAs/AlGaAs Heterostructure

Hyungkook Choi, Minsoo Kim, Ji-Yun Moon, Jae-Hyun Lee, and Seok-Kyun Son · Journal of Nanoscience and Nanotechnology 20, 4428 (2020)

2020 · 18

Properties of a Surface-Gate-Controlled Two-Dimensional Electron Gas in Undoped GaAs/AlGaAs Heterostructures

Hyungkook Choi, Youngwoo Nam, Jae-Hyun Lee, Seok-Kyun Son · JKPS 76, 1083 (2020)

2020 · 19

Manipulation of valley isospins in strained graphene for valleytronics

Nojoon Myoung, Hyungkook Choi, Hee Chul Park · Carbon 157, 578 (2020)

2020 · 20

Precision current measurement with thermal-drift-minimized offset current for single-parameter electron pumps based on gate-switching technique

Bum-Kyu Kim, Suk-In Park, Jindong Song, Hyung-Kook Choi, Wan-Seop Kim, Nam Kim, Myung-Ho Bae · AIP Advances 10, 045332 (2020)

2019 · 21

Current-reversal operation for a single parameter electron pump by control of semiconductor-based cryo-switch gate potentials

Byeong-Sung Yu, Bum-Kyu Kim, Suk-In Park, Jindong Song, Hyung-Kook Choi, Sung-Un Cho, Ju-Jin Kim, Wan-Seop Kim, Nam Kim, Myung-Ho Bae · AIP Advances 9, 105017 (2019)

2019 · 22

Nanomachining-enabled strain manipulation of magnetic anisotropy in the free-standing GaMnAs nanostructures

Chanuk Yang, Jae-Hyun Lee, Myunglae Jo, Hyung Kook Choi, Seondo Park, Young Duck Kim, Sung Un Cho, Donguk Kim, Yun Daniel Park · Scientific Reports 9, 13633 (2019)

2019 · 23

In situ observation of lithium metal plating in a sulfur-based solid electrolyte for all-solid-state batteries

Seong Heon Kim, KiHong Kim, Hyungkook Choi, Dongmin Im, Sung Heo and Hong Soo Choi · Journal of Materials Chemistry A 7, 13650 (2019)

2018 · 24

Attractive Coulomb interactions in a triple quantum dot

Changki Hong, Gwangsu Yoo, Jinhong Park, Min-Kyun Cho, Yunchul Chung, H.-S. Sim, Dohun Kim, Hyungkook Choi, Vladimir Umansky, and Diana Mahalu · Physical Review B 97, 241115(R) (2018)

2018 · 25

Interaction-induced interference in the integer quantum Hall effect

I. Sivan, R. Bhattacharyya, H. K. Choi†, M. Heiblum†, D. E. Feldman, D. Mahalu, and V. Umansky · Physical Review B 97, 125405 (2018)

2017 · 26

Nontrivial transition of transmission in a highly open quantum point contact in the quantum Hall regime

Changki Hong, Jinhong Park, Yunchul Chung†, Hyungkook Choi†, Vladimir Umansky · Physical Review B 96, 205431 (2017)

2016 · 27

Free-Standing GaMnAs Nanomachined Sheets for van der Pauw Magnetotransport Measurements

Jae-Hyun Lee, Seondo Park, Chanuk Yang, Hyung Kook Choi, Myung Rae Cho, Sung Un Cho and Yun Daniel Park · Micromachines 7, 223 (2016)

2016 · 28

Observation of Interaction-Induced Modulations of a Quantum Hall Liquid's Area

I. Sivan*†, H. K. Choi*†, Jinhong Park, A. Rosenblatt, Yuval Gefen, D. Mahalu, V. Umansky · Nature Communications 7, 12184 (2016)

2015 · 29

Robust electron pairing in the integer quantum Hall effect regime

H. K. Choi*†, I. Sivan*†, A. Rosenblatt, M. Heiblum, V. Umansky, D. Mahalu · Nature Communications 6, 7435 (2015)

2014 · 30

An electronic quantum eraser

E. Weisz*, H. K. Choi*, I. Sivan, M. Heiblum, Yuval Gefen, D. Mahalu, V. Umansky · Science 344, 1363 (2014)
Perspective, “Electronically erased”, Science 344, 1344 (2014).

2014 · 31

Multi-Valued Logic Gates based on Ballistic Transport in Quantum Point Contacts

M. Seo, C. Hong, S.-Y. Lee, H. K. Choi, N. Kim, Y. Chung, V. Umansky, D. Mahalu · Scientific Report 4, 3806 (2014)

2013 · 32

Charge Frustration in a Triangular Triple Quantum Dot

M. Seo, H. K. Choi, S.-Y. Lee, N. Kim, Y. Chung, H.-S. Sim, V. Umansky, D. Mahalu · Phys. Rev. Lett. 110, 046803 (2013)
News & Views, “A frustrated trio”, Nature 495, 321 (2013).

2012 · 33

Controlled Dephasing of an Electron Interferometer with a Path Detector at Equilibrium

E. Weisz, H. K. Choi, M. Heiblum, Yuval Gefen, V. Umansky, D. Mahalu · Phys. Rev. Lett. 109, 250401 (2012)

2011 · 34

Observation of electric and magnetic properties in a diluted magnetic semiconductor GaMnAs/GaAs (111)

C. S. Park, H. K. Choi, C. U. Yang, Y. D. Park, J. Y. Son, Yoon Shon · J. Cryst. Growth 336, 20 (2011)

2009 · 35

Modification of magnetotransport properties across patterned GaMnAs nanoconstrictions by application of high current densities

Sung Un Cho, Hyung Kook Choi, Chan Uk Yang, Yun Daniel Park, Fabio C. S. Da Silva, Teresa Osminer, David P. Pappas · Appl. Phys. Lett. 95, 022517 (2009)

2009 · 36

Bias-Dependent Tunneling Magnetoresistance of GaAs Diodes with Ferromagnetic (Ga,Mn)As Layers

S. K. Jerng, J. H. Kim, S. H. Chun, Y. S. Kim, H. K. Choi, Y. D. Park and Z. G. Khim · J. Korean Phys. Soc. 54, 1725 (2009)

2008 · 37

Evidence for secondary ferromagnetic phases in the nuclear magnetic resonance spectra of GaMnAs epitaxial films and their nominal effect

T. Hwang, S. Lee, H. K. Choi, Y. S. Kim, Y. D. Park, S.H. Chun · J. Kor. Phys. Soc. 52, 396 (2008)

2007 · 38

Nonlinear transport below TC for lateral nanoconstrictions realized in a 100 nm GaMnAs epifilm

Sung Woon Cho, Hyung Kook Choi, Joon Sue Lee, Diana Jeong, Hyung Joon Kim, Taesoon Hwang, Kee Hoon Kim, Yun Daniel Park · Appl. Phys. Lett. 91, 122514 (2007)

2007 · 39

Regrowth of diluted magnetic semiconductor GaMnAs on InGaP (001) surfaces to realize freestanding micromechanical structures

Hyung Kook Choi, Joon Sue Lee, Sung Woon Cho, Won Oh Lee, Seung Bo Shim, Yun Daniel Park · J. Appl. Phys. 101, 063906 (2007)

2007 · 40

Non-Monotonic dependence of the anomalous Hall coefficient scaling parameter in annealed Ga1-xMnxAs epifilms

H. K. Choi, W. O. Lee, Y.S. Oh, K. H. Kim, Y. D. Park · J. Magn. Magn. Mater. 310, 2129 (2007)

2007 · 41

Interplay between carrier and impurity concentrations in diluted magnetic semiconductor Ga1-xMnxAs anomalous Hall Effect

S. H. Chun, Y. S. Kim, H. K. Choi, I. T. Jeong, W. O. Lee, K. S. Suh, Y. S. Oh, K. H. Kim, Z. G. Khim, J. C. Woo, Y. D. Park · Phys. Rev. Lett. 98, 026601 (2007)

2007 · 42

Intrinsic anomalous Hall conductivity of GaMnAs solely governed by the carrier concentration

S. H. Chun, Y. S. Kim, H. K. Choi, W. O. Lee, K. S. Suh, Y. S. Oh, K. H. Kim, Z. G. Khim and Y. D. Park · J. Magn. Magn. Mater. 301, 2064 (2007)

2007 · 43

Magnetic anisotropy and ac susceptibility of (Ga,Mn)As

Y.S. Kim, S. Jerng, J. Yoon, Y. Jo, M.H. Jung, H.K. Choi, Z.G. Khim, Y.D. Park, and S.H. Chun · J. Korean Phys. Soc. 50, 839 (2007)

2007 · 44

Post-annealing effect on the electronic structure of Mn atoms in Ga1−xMnxAs probed by resonant inelastic x-ray scattering

G. S. Chang, E. Z. Kurmaev, L. D. Finkelstein, H. K. Choi, W. O. Lee, Y. D. Park, T. M. Pedersen, A. Moewes · J. Phys.: Condens. Matter 19, 076215 (2007)

2006 · 45

Evidence of metallic clustering in annealed Ga1-xMnxAs from atypical scaling behavior of the anomalous Hall coefficient

H. K. Choi, Y. S. Kim, S. S. A. Seo, I. T. Jeong, W. O. Lee, Y. S. Oh, K. H. Kim, J. C. Woo, T. W. Noh, Z. G. Khim, Y. D. Park, S. H. Chun · Appl. Phys. Lett. 89, 102503 (2006)

2006 · 46

Effect of Gd implantation on the structural and magnetic properties of GaN and AlN

Sang Yoon Han, J. Hite, G. T. Thaler, R. M. Frazier, C. R. Abernathy, S. J. Pearton, H. K. Choi, W. O. Lee, Y. D. Park, J. M. Zavada, and R. Gwilliam · Appl. Phys. Lett. 88, 042102 (2006)

2006 · 47

Temperature dependence of the anomalous Hall effect in ferromagnetic (Ga,Mn)As epilayers

Y. S. Kim, H. K. Choi, Z. G. Khim, J. C. Woo, Y. D. Park, S. H. Chun · Phys. Stat. Sol. (c), 3, 697 (2006)

2006 · 48

Vertical spin transport in MnAs/GaMnAs heterostructures

S. H. Chun, J. P Yu, Y. S. Kim, H. K. Choi, J. H. Bak, Y. D. Park and Z. G. Khim · J. Magn. Magn. Mater., 304, e337 (2006)

2005 · 49

Effect of carbon co-doping on III-As based diluted magnetic semiconductors

H. K. Choi, S. B. Shim, K. S. Suh, Y. S. Kim, J. S. Lee, Z. G. Khim, I. T. Jeong, J. C. Woo, C. R. Abernathy, S. J. Pearton, and Y. D. Park · IOP Conf. Ser. 184, 145 (2005)

2005 · 50

A study on the validity of the skew scattering model for the anomalous Hall Effect in low-temperature molecular beam epitaxy Gallium Manganese Arsenide

Y. S. Kim, I. T. Jeong, J. C. Woo, Z. G. Khim, J. S. Lee, H. K. Choi, Y. S. Oh, K. H. Kim, Y. D. Park, and S. H. Chun · J. Kor. Phys. Soc. 47, 306 (2005)