Original Publications

1. Akifumi Mine, Takeshi Suzuki*, Yigui Zhong, Sahand Najafzadeh, Kenjiro Okawa, Masato Sakano, Kyoko Ishizaka, Shik Shin, Takao Sasagawa, and Kozo Okazaki*, "Direct Observation of the Surface Superconducting Gap in the Topological Superconductor Candidate β-PdBi2", Phys. Rev. Lett. 135, 236002 (2025).

https://doi.org/10.1103/3jgn-22rx

2. Akifumi Mine, Yigui Zhong, Jinjin Liu, Takeshi Suzuki, Sahand Najafzadeh, Takumi Uchiyama, Jia-Xin Yin, Xianxin Wu, Xun Shi, Zhiwei Wang, Yugui Yao, and Kozo Okazaki, "Observation of Fermi-surface-dependent anisotropic Cooper pairing in kagome superconductor CsV3Sb5", Commun. Mater. 6, 276 (2025).

https://doi.org/10.1038/s43246-025-01002-y 

3. Kecheng Liu, Takeshi Suzuki, Yigui Zhong, Teruto Kanai, Jiro Itatani, Linda Ye, Maya Martinez, Anisha Singh, Ian R Fisher, Uwe Bovensiepen, and Kozo Okazaki, "Distinct Amplitude Mode Dynamics Upon Resonant and Off-resonant Excitation Across the Charge Density Wave Energy Gap in LaTe3 Investigated by Time- and Angle-resolved Photoemission Spectroscopy", J. Phys. Soc. Jpn. 94, 104706 (2025).

https://doi.org/10.7566/JPSJ.94.104706

4. Christopher L Smallwood, Rachel Owen, Matthew W Day, Takeshi Suzuki, Rohan Singh, Travis M Autry, Smriti Bhalerao, Fauzia Jabeen, and Steven T Cundiff, "Indirect excitons and many-body interactions in InGaAs double quantum wells", Phys. Rev. B 112, 035305 (2025). Editors’ Suggestion

https://doi.org/10.1103/2vwk-rkc5 

5. T. Suemoto, H. Morino, S. Ono, T. Okuno, T. Suzuki, K. Okazaki, S. Tani, and Y. Kobayashi, "Composition-dependent ultrafast luminescence in Cu-Ni alloys: Combined experimental and ab initio study", Phys. Rev. B 112, 035138 (2025).

https://doi.org/10.1103/xn1s-28z3 

6. Y. Kubota, T. Suzuki, S. Owada, K. Tamasaku, H. Osawa, T. Togashi, K. Okazaki, and M. Yabashi, "A simple method to find temporal overlap between THz and x-ray pulses using x-ray-induced carrier dynamics in semiconductors", Appl. Phys. Lett. 126, 052101 (2025). Editor’s Pick

https://doi.org/10.1063/5.0242393

7. T. Suemoto, S. Ono, A. Asahara, T. Okuno, T. Suzuki, K. Okazaki, S. Tani, and Y. Kobayashi, "Comprehensive study of the luminescence properties of elemental metals", Phys. Rev. B 111, 035150 (2025).

https://doi.org/10.1103/PhysRevB.111.035150

8. Y. Chen, T. Nakamura, H. Watanabe, T. Suzuki, Q. Ren, K. Liu, Y. Zhong, T. Kanai, J. Itatani, K. Okazaki, H. S. Suzuki, S. Shin, K. Imura, N. K. Sato, and S. Kimura, "Photo-Induced Nonlinear Band Shift and Valence Transition in SmS", J. Phys. Soc. Jpn. 94, 013702 (2025).

https://doi.org/10.7566/JPSJ.94.013702

9. Yigui Zhong, Takeshi Suzuki, Hongxiong Liu, Kecheng Liu, Zhengwei Nie, Youguo Shi, Sheng Meng, Baiqing Lv, Hong Ding, Teruto Kanai, Jiro Itatani, Shik Shin, and Kozo Okazaki, "Unveiling van Hove singularity modulation and fluctuated charge order in kagome superconductor CsV3Sb5 via time-resolved ARPES", Phys. Rev. Research  6, 043328 (2024). Editors’ Suggestion

https://doi.org/10.1103/PhysRevResearch.6.043328

10. Joseph A Hlevyack, Sahand Najafzadeh, Yao Li, Tsubaki Nagashima, Akifumi Mine, Yigui Zhong, Takeshi Suzuki, Akiko Fukushima, Meng-Kai Lin, Soorya Suresh Babu, Jinwoong Hwang, Ji-Eun Lee, Sung-Kwan Mo, James N Eckstein, Shik Shin, Kozo Okazaki, Tai-Chang Chiang, "Uniform Diffusion of Cooper Pairing Mediated by Hole Carriers in Topological Sb2Te3/Nb", ACS Nano 18, 31323 (2024).

https://doi.org/10.1021/acsnano.4c10533

11. Takeshi Suzuki, Yigui Zhong, Kecheng Liu, Teruto Kanai, Jiro Itatani, and Kozo Okazaki, "Time- and angle-resolved photoemission spectroscopy with wavelength-tunable pump and extreme ultraviolet probe enabled by twin synchronized amplifiers", Rev. Sci. Instrum. 95, 073001 (2024).

https://doi.org/10.1063/5.0204133

12. T. Suzuki, Y. Kubota, N. Mitsuishi, S. Akatsuka, J. Koga, M. Sakano, S. Masubuchi, Y. Tanaka, T. Togashi, H. Ohsumi, K. Tamasaku, M. Yabashi, H. Takahashi, S. Ishiwata, T. Machida, I. Matsuda, K. Ishizaka, and K. Okazaki, "Ultrafast control of the crystal structure in a topological charge-density-wave material", Phys. Rev. B 108, 184305 (2023).

https://doi.org/10.1103/PhysRevB.108.184305

13. T. Suemoto, S. Ono, A. Asahara, T. Okuno, T. Suzuki, K. Okazaki, S. Tani, and Y. Kobayashi, "Observation of infrared interband luminescence in magnesium by femotosecond spectroscopy", J. Appl. Phys. 134, 163105 (2023).

https://doi.org/10.1063/5.0165493

14. Y. Kubota, N. Nabeshima, K. Nakayama, H. Ohsumi, Y. Tanaka, K. Tamasaku, T. Suzuki, K. Okazaki, T. Sato, A. Maeda, and M. Yabashi, "Pure nemetic state in the iron-based superconductor FeSe", Phys. Rev. B 108, L100501 (2023).

https://doi.org/10.1103/PhysRevB.108.L100501 

15. Q. Ren, T. Suzuki*, T. Kanai, J. Itatani, S. Shin, and K. Okazaki*, “Phase-resolved frequency-domain analysis of the photoemission spectra for photoexcited 1T-TaS2  Mott insulating charge density wave state”, Appl. Phys. Lett. 122, 221902 (2023). Editor’s Pick

https://doi.org/10.1063/5.0149692

16. Y. Takahashi, T. Suzuki, M. Hattori, M. Okawa, H. Takagi, N. Katayama, H. Sawa, M. Nohara, Y. Zhong, K. Liu, T. Kanai, J. Itatani, S. Shin, K. Okazaki, and T. Mizokawa, “Temporal Evolution and Fluence Dependence of Band Structure in Photoexcited Ta2Ni0.9Co0.1Se5 Probed by Time- and Angle-Resolved Photoemission Spectroscopy”, J. Phys. Soc. Jpn. 92, 064706 (2023). Editors’ Choice

https://doi.org/10.7566/JPSJ.92.064706

17. Y. Zhong, J. Liu, X. Wu, Z. Guguchia, J.-X. Yin, A. Mine, Y. Li, S. Najafzadeh, D. Das, C. Mielke III, R. Khasanov, H. Luetkens, T. Suzuki, K. Liu, X. Han, T. Kondo, J. Hu, S. Shin, Z. Wang, X. Shi, Y. Yao, and K. Okazaki, “Nodeless electron pairing in CsV3Sb5-dirived kagome superconductors”, Nature 617, 488 (2023).

https://doi.org/10.1038/s41586-023-05907-x

18. T. Mitsuoka, Y. Takahashi, T. Suzuki, M. Okawa, H. Takagi, N. Katayama, H. Sawa, M. Nohara, M. Watanabe, J. Xu, Q. -H. Ren, M. Fujisawa, T. Kanai, J. Itatani, K. Okazaki, S. Shin, and T. Mizokawa, “Quasi One-Dimensional Band Structure of Photoinduced Semimetal Phase of Ta2Ni1-xCoxSe5 (x = 0.0 and 0.1)”, J. Phys. Soc. Jpn. 92, 023703 (2023).

https://doi.org/10.7566/JPSJ.92.023703

19. M. Okawa, Y. Akabane, M. Maeda, G. Tan, L.-D. Zhao, M. G. Kanatzidis, T. Suzuki, M. Watanabe, J. Xu, Q. -H. Ren, M. Fujisawa, T. Kanai, J. Itatani, S. Shin, K. Okazaki, N. L. Saini, and T. Mizokawa, “Direct observation of multiple conduction-band minima in high-performance thermoelectric SnSe”, Scripta Materialia 223, 115081 (2023).

https://doi.org/10.1016/j.scriptamat.2022.115081 

20. Mari Watanabe, Takeshi Suzuki*, Takashi Someya, Yu Ogawa, Shoya Michimae, Masami Fujisawa, Teruto Kanai, Jiro Itatani, Tomohiko Saitoh, Shik Shin, and Kozo Okazaki, “Photo-Excitation Band-Structure Engineering of 2H-NbSe2 Probed by Time- and Angle-Resolved Photoemission Spectroscopy”, J. Phys. Soc. Jpn. 91, 064703 (2022).

https://doi.org/10.7566/JPSJ.91.064703

21. Y. Zhao, T. Suzuki, T. Iimori, H.-W. Kim, J. R. Ahn, M. Horio, Y. Sato, Y. Fukaya, T. Kanai, K. Okazaki, S. Shin, S. Tanaka, F. Komori, H. Fukidome, and I. Matsuda, “Environmental effects on layer-dependent dynamics of Dirac fermions in quasicrystalline bilayer graphene”, Phys. Rev. B 105, 115304 (2022).

https://doi.org/10.1103/PhysRevB.105.115304 

22. T. Suzuki, Y. Kubota, A. Nakamura, T. Shimojima, K. Takubo, S. Ito, K. Yamamoto, S. Michimae, H. Sato, H. Hiramatsu, H. Hosono, T. Togashi, M. Yabashi, H. Wadati, I. Matsuda, S. Shin, and K. Okazaki, “Ultrafast optical stress on BaFe2As2”, Phys. Rev. Research 3, 033222 (2021).

https://doi.org/10.1103/PhysRevResearch.3.033222

23. T. Suzuki, Y. Shinohara, Y. Lu, M. Watanabe, J. Xu, K. L. Ishikawa, H. Takagi, M. Nohara, N. Katayama, H. Sawa, M. Fujisawa, T. Kanai, J. Itatani, T. Mizokawa, S. Shin, and K. Okazaki, “Detecting electron-phonon coupling during photoinduced phase transition”, Phys. Rev. B 103, L121105 (2021).　Editors’ Suggestion

https://doi.org/10.1103/PhysRevB.103.L121105

24. T. Mitsuoka, T. Suzuki, H. Takagi, N. Katayama, H. Sawa, M. Nohara, M. Watanabe, J. Xu, Q. Ren, M. Fujisawa, T. Kanai, J. Itatani, S. Shin, K. Okazaki, and T. Mizokawa, “Photoinduced Phase Transition from Excitonic Insulator to Semimetal-like State in Ta2Ni1−xCoxSe5 (x = 0.10)”, J. Phys. Soc. Jpn. 89, 124703 (2020).

https://doi.org/10.7566/JPSJ.89.124703

25. R.-Y. Liu, M.-K. Lin, P. Chen, T. Suzuki, P. C. J. Clark, N. K. Lewis, C. Cacho, E. Springate, C.-S. Chang, K. Okazaki, W. Flavell, I. Matsuda, and T.-C. Chiang, “Symmetry-breaking and spin-blockage effects on carrier dynamics in single-layer tungsten diselenide”, Phys. Rev. B 100, 214309 (2019).

https://doi.org/10.1103/PhysRevB.100.214309

26. T. Suzuki, T. Iimori, S. J. Ahn, Y. Zhao, M. Watanabe, J. Xu, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, K. Suwa, H. Fukidome, S. Tanaka, J. R. Ahn, K. Okazaki, S. Shin, F. Komori, and I. Matsuda, “Ultrafast Unbalanced Electron Distributions in Quasicrystalline 30° Twisted Bilayer Graphene”, ACS Nano 13, 11981 (2019).

https://doi.org/10.1021/acsnano.9b06091

27. T. Suzuki, T. Someya, T. Hashimoto, S. Michimae, M. Watanabe, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, S. Kasahara, Y. Matsuda, T. Shibauchi, K. Okazaki, and S. Shin, “Photoinduced possible superconducting state with long-lived disproportionate band filling in FeSe”, Communications Physics 2, 115 (2019).

https://doi.org/10.1038/s42005-019-0219-4

https://www.u-tokyo.ac.jp/focus/en/press/z0508_00075.html 

28. T. Suzuki, R. Singh, G. Moody, M. Abmann, M. Bayer, A. Ludwig, A. D. Wieck, and S. T. Cundiff, “Dephasing of InAs quantum dot p-shell excitons studied using two-dimensional coherent spectroscopy”, Phys. Rev. B 98, 195304 (2018).

https://doi.org/10.1103/PhysRevB.98.195304

29. K. Okazaki, Y. Ogawa, T. Suzuki, T. Yamamoto, T. Someya, S. Michimae, M. Watanabe, Y -F. Lu, M. Nohara, H. Tagkagi, N. Katayama, H. Sawa, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, T. Mizokawa, and S. Shin, “Photo-induced semimetallic states realized in electron-hole coupled insulators”, Nature Commun. 9, 4322 (2018).

https://doi.org/10.1038/s41467-018-06801-1

30. T. Suzuki, R. Singh, M. Bayer, A. Ludwig, A. D. Wieck, and S. T. Cundiff, “Detuning dependence of Rabi oscillations in an InAs self-assembled quantum dot ensemble”, Phys. Rev. B 97, 161301 (R) (2018). Editors’ Suggestion

https://doi.org/10.1103/PhysRevB.97.161301

31. K. Okazaki, H. Suzuki, T. Suzuki, T. Yamamoto, T. Someya, Y. Ogawa, M. Okada, M. Fujisawa, T. Kanai, N. Ishii, J. Itatani, M. Nakajima, H. Eisai, A. Fujimori, and S. Shin, “Antiphase Fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors”, Phys. Rev. B 97, 121107 (R) (2018).

https://doi.org/10.1103/PhysRevB.97.121107

32. R. Liu, Y. Ogawa, P. Chen, K. Ozawa, T. Suzuki, M. Okada, T. Someya, Y. Ishida, K. Okazaki, S. Shin, T. -C. Chiang, and I. Matsuda, “Femtosecond to picosecond transient effects in WSe2 observed by pump-probe angle-resolved photoemission spectroscopy”, Sci. Report 7, 15981 (2017).

https://doi.org/10.1038/s41598-017-16076-z

33. T. Suzuki, R. Singh, M. Bayer, A. Ludwig, A. D. Wieck, and S. T. Cundiff, “Coherent Control of the Exciton/Biexciton System in an InAs Self Assembled Quantum Dot Ensemble”, Phys. Rev. Lett. 117, 157402 (2016). Editors’ Suggestion & Featured in Physics

https://doi.org/10.1103/PhysRevLett.117.157402

34. R. Singh, T. Suzuki, T. M. Autry, G. Moody, M. E. Siemens, and S. T. Cundiff, “Polarization dependent exciton dephasing rate in semiconductor quantum wells : A consequence of bosonic nature of excitons”, Phys. Rev. B 94, 081304 (R) (2016).

https://doi.org/10.1103/PhysRevB.94.081304

35. T. Suzuki and R. Shimano, “Exciton Mott Transition in Si Revealed by Terahertz Spectroscopy”, Phys. Rev. Lett. 109, 046402 (2012).

https://doi.org/10.1103/PhysRevLett.109.046402

36. T. Suzuki and R. Shimano, “Cooling dynamics of photoexcited carriers in Si studied using optical pump and terahertz probe spectroscopy”, Phys. Rev. B 83, 085207 (2011).

https://doi.org/10.1103/PhysRevB.83.085207

37. R. Shimano and T. Suzuki, “Exciton Mott Transition in Si Studied by Terahertz Spectroscopy”, Phys. Status Solidi C 8, 1153 (2011).

https://doi.org/10.1002/pssc.201000836

38. T. Suzuki and R. Shimano, “Time-Resolved Formation of Excitons and Electron-Hole Droplets in Si Studied Using Terahertz Spectroscopy”, Phys. Rev. Lett. 103, 057401 (2009).

https://doi.org/10.1103/PhysRevLett.103.057401