第1回物理工学科教室談話会[Prof. Philipp Gegenwart・4/28(金)15時～]

講　師：Prof. Philipp Gegenwart
所　属：Experimentalphysik VI, Universität Augsburg
題　目：Magnetic frustration: opportunities,challenges and applications
日　時: 2023 年 4 月 28 日(金) 15:00～
Date and Time: April 28, 2023 (Friday) 15:00-
場　所: 工 6 号館 3 階セミナー室 A(ハイブリッド開催)
Place: Seminar Room A, 3rd floor, Engineering Bldg. 6 (Hybrid)
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Abstract:
Frustration appears in many contexts – in magnets, its connotations are truly positive since it hinders conventional order and triggers new phenomena, giving researchers the opportunity to devise novel quantum states and even design them experimentally. The most sought after frustrated magnetic phases are quantum spin liquids (QSL) states, arising e.g. in resonating-valence-bond- or Kitaev models. Their realization is challenged by complexities in real materials. One important aspect is thus the study of “proximate” QSL behavior under different tuning parameters. On the long term, the control and utilization of entanglement and fractionalized excitations will advance quantum technology. As immediate application, we recently demonstrated the excellent performance of frustrated magnets for milli-Kelvin adiabatic demagnetization refrigeration.

Biography:
Philipp Gegenwart studied physics at TU Darmstadt and graduated there in 1998 under the supervision of Frank Steglich on unconventional superconductivity. Afterwards he moved to the Max-Planck Institute for Chemical Physics of Solids in Dresden and spend a year a
guest researcher at St. Andrews in Scotland. In 2006 he was appointed as professor for experimental low-temperature physics at the University of Göttingen. Since 2014 he leads a
chair at the Center for Electronic Correlations and Magnetism at the University of Augsburg.

紹介教員: 求幸年教授(物理工学専攻)、Max Hirschberger 准教授(物理工学専攻)