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物質生命基礎科学／物理学教室

大学院科目名 物質生命基礎科学
医学部教室名 物理学教室
スタッフ
教授　　　　　　　高西　陽一
准教授　　　　　　川野　輝彦
助教（学内講師）　酒谷　雄峰
研究内容
1.ソフトマターの物理学
ソフトマターとは液晶、高分子、コロイドや界面活性剤などのやわらかい物質の総
称で、生体も典型的なソフトマターです。その特徴は多様な分子からなる階層構造
と共同的な運動に起因します。当研究室ではレーザー、X線や放射光施設の量子ビ
ームの利用、また電気光学的な測定や各種分光的手法によって、ソフトマターの構
造や物性の物理的な理解を目指し、新規機能発現を目指した研究を行っています。
2. 物質の根源を探る理論的を研究
物質の究極の構成要素は何であり、それらはどのような相互作用をしているかを探
求しています。この研究は、宇宙や時空間そのものの生成についての研究に深く関
係しています。
研究業績
  1. Y. Takanishi,  N. Yadav, V. P. Panov , H. Iwayama, F. Araoka , A. Fukuda , J. K. Vij Subphase with four-layer superlattice structure confirmed by resonant soft x-ray scattering in thresholdless antiferroelectric liquid crystal mixtures, Phys. Rev. E (2026) (DOI: 10.1103/wtm3-czy1) 
  2. H.Takao, Y.Takanishi,J. Yamamoto, Stabilization of blue phases by solvent effect using n-octadecane with a simple linear molecular structure, EuroPhys. Letters, 153,47001 (2026).
  3. F. Hassler, D. Osten, Y. Sakatani, Duality covariant curvatures for the heterotic string, JHEP 09, 031 (2025).
  4. C. Csaki, T. Kawano, H. Murayama, O. Telem, Phase transitions at unusual values of θ, The Journal of High Energy Physics,　12, 004, (2025).
  5. F. Hassler, Y. Sakatani, L. Scala, Generalized dualities for heterotic and type I strings,  JHEP 08, 059 (2024)
  6. E. Lescano, N. Mirón-Granese, Y. Sakatani, O(D,D)-covariant formulation of perfect and imperfect fluids in the double geometry, Phys. Rev. D 109, no.8, 086006 (2024)
  7. Y. Sakatani, Y. Satoh, On quantum Poisson-Lie T-duality of WZNW models,  JHEP 01, 150 (2024)
  8. F. Hassler, Y. Sakatani, Hierarchy of curvatures in exceptional geometry,  Phys. Rev. D 109, no.10, 106002 (2024)
  9. R. Deb, R. K. Nath, D. D. Sarkar, G. Mohiuddin, R. Nandiraju, S. Aya, K. Le, F. Araoka, K. Ishikawa, H. Takezoe, Y. Takanishi, “Synthesis of four-ring unsymmetrical bent-core mesogens and cybotactic cluster formation in their nematic phase”, J. Mol. Sci., 1317, 139055. (2024). 
  10.  J.-J. Lee, S. Kim, H.Nishikawa, Y. Takanishi, H. Iwayama, C.Kim, S.-W. Choi and F. Araoka,Chiroptical Performances in Self-Assembled Hierarchical Nanosegregated Chiral Intermediate Phases Composed of Two Different Achiral Bent-Core Molecules, Int. J. Mol. Sci. 23, 14629 (2022).
  11. Y. Sakatani, Poisson-Lie T-plurality for dressing cosets, PTEP 2022, no.6, 063B01 (2022).
  12. Y. Takanishi, F. Araoka, and H. Iwayama, The effect of the structure of helical nanofilament of the B4 phase of bent-core liquid crystals on the nano-phase separation mixed with rod-like cholesteric liquid crystal mixture, RSC Adv. 12, 29346 (2022).
  13. A. Fukuda, J. K. Vij and Y. Takanishi, Variety of subphase emerging sequences, the frustration of three main phases, SmC∗ A, SmC∗, and SmA, and the long-range interlayer interactions, Phys. Rev. E 104, 014705 (2021).
  14. E. Malek, Y. Sakatani and D. C. Thompson, E_{6(6)} Exceptional Drinfel'd Algebras, JHEP 01,020 (2021).
  15. Y. Takanishi, New liquid crystal formation induced by nano-scale phase separation composed of a bent-core liquid crystal and rod-like cholesteric liquid crystal mixtures, Soft Matter, 17, 563 (2021).
  16. Y. Takanishi, Chiral symmetry breaking in liquid crystals: appearance of ferroelectricity and antiferroelectricity, Symmetry 12, 1900 (2020).
  17. Y. Sakatani, U-duality extension of Drinfel'd double, PTEP 2020, no.2, 023B08 (2020).
  18. Y. Takanishi * , A. Iida, N. Yadav, A. D. L. Chandani Perera, A. Fukuda, M. A. Osipov, and J. K. Vij, Unexpected electric-field-induced antiferroelectric liquid crystal phase in the SmCa* temperature range and the discrete flexoelectric effect, Phys. Rev. E(Rapid com.) 100, 010701(2019).
  19. Y. Sakatani, Type II DFT solutions from Poisson-Lie T-duality/plurality, PTEP 2019, no.7, 073B04 (2019).
  20. T. Araujo, E. Ó Colgáin, Y. Sakatani, M. M. Sheikh-Jabbari, H. Yavartanoo, Holographic integration of T\bar{T} and J\bar{T} via O(d,d), JHEP 03, 168 (2019).
  21. A.Iida, Y. Takanishi, A. Fukuda and J.K.Vij, Resonant X-ray scattering observation of transitional subphases during the electric-field-induced phase transition in a mixture of Se-containing chiral smectic liquid crystals, Phys. Rev. E 97, 062702-1 (2018).
  22. A.D.L. Chandani Perera, A. Fukuda, J. K. Vij and Y. Takanishi * , Ferrielectric six-layer q E =1/3 (q T =2/3) and several electric-field-induced subphases in AS657 studied by complementary methods, electric-field-induced birefringence and microbeam resonant X-ray scattering, Liq.Cryst.(INVITED ARTICLE) 44 1-12 (2017) .
  23. Z. Feng, A.D.L. Chandani Perera, A. Fukuda, J. K. Vij, K. Ishikawa A.Iida and Y. Takanishi * , Definite existence of subphases with eight- and ten-layer unit cells as studied by complementary methods, electric field induced birefringence and microbeam resonant x-ray scattering, Phys. Rev.E 96, 012701-1 (2017).
  24. Y. Sakatani, S. Uehara and K. Yoshida, Generalized gravity from modified DFT, JHEP 04, 123 (2017).
  25. A.D.L. Chandani, A. Fukuda, J.K. Vij, Y. Takanishi*, and A.Iida, Effective long-range interlayer interaction and electric-field induced subphases in ferroelectric liquid crystals, Phys. Rev. E 93 042707 (2016).
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