visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2023-07-11 11:00 
일시 July 11th(Tue), 11:00AM 
장소 E6-2, #1323 
연사 Dr. Mingxuan Fu (University of Tokyo) 
물리학과에서는 아래와 같이 세미나를 개최하고자 하오니 관심있는 분들의 많은 참석 부탁드립니다.
 
Date: 11:00 Am, 11th July (Tue)
 
Place: E6-2, #1323
 
Speaker: Dr. Mingxuan Fu(University of Tokyo)
 
Title: Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
 
Abstract: 

Electrons' charge, spin, orbital degrees of freedom, and phonons constitute the fundamental building blocks of correlated quantum matters. The complex interplay among them renders exotic emergent phenomena that push the boundaries of our knowledge about the quantum world. Though earlier studies essentially focus on the role of spin in generating quantum phases and fluctuations, designing novel quantum phases with alternative ingredients other than spin may inspire a new conceptual framework for understanding confounding quantum phenomena in strongly correlated electron systems [1-3]. 

Entanglement between multipolar moments and conduction electrons paves a new route to extend the landscape of novel quantum phenomena beyond the spin-only paradigm. A model platform for exploring multipolar physics is the cubic heavy-fermion system PrTr2Al20 (Tr = Ti, V). This system features a nonmagnetic ground state in which the magnetic dipolar moment (spin) is absent, but higher-rank multipolar moments (quadrupoles and octupoles) are active [4]. The entanglement of these local multipolar moments with conduction electrons results in a rich phase diagram comprising multipolar orders, non-Fermi liquid (NFL) phase, and exotic superconductivity [4-6]. In this talk, I will present our experimental investigation into the multipolar ordered phases and magnetic-field-induced quantum critical behavior in PrV2Al20 via a combination of electrical transport, thermodynamics, and lattice probes, which shows that the evolution of ordered phases, non-Fermi liquid behavior, and Fermi surface across the multipolar quantum critical regime drastically differs from that in the familiar magnetic setting.

 

References

[1] S. Paschen and Q. Si, Nat. Rev. Phys. 3, 9-26 (2021)

[2] P.W. Phillips, N.E. Hussey, and P. Abbamonte, Science 377, (2022)

[3] A. E. Böhmer, J-H Chu, S. Lederer and M. Yi, Nat. Phys. 18, 1412-1419 (2022)

[4] A. Sakai and S. Nakatsuji, J. Phys. Soc. Jpn. 80, 063701 (2011)

[5] K. Matsubayashi et al., Phys. Rev. Letts. 109, 187004 (2012)

[6] Y. Shimura et al Phys. Rev. B. 91, 241102(R)

번호 날짜 장소 제목
544 2018-09-07 15:00  학술문화관 (E9), 2층 양승택 오디토리움  Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
543 2016-05-17 11:00  창의학습관(E11), 406호  The CERN Resonant WISP Search: Development, Results and Lesson-Learned
542 2022-05-13 16:00  자연과학동(E6-2) 1st fl. #1323  High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
541 2021-11-02 16:00  자연과학동(E6-2) #1323  Metrology of Band Topology via Resonant Inelastic X-ray Scattering file
540 2017-12-13 13:30  자연과학동 대형강의실 (1501호)  KAIST-KIAS Joint Workshop in Theoretical Sciences 개최 file
539 2021-05-27 16:00  온라인  찾아가는 물리연구 현장(유럽 입자물리학연구소 소개) file
538 2018-08-01 11:00  양분순 빌딩 (E16-1) 207호  Future of AI: Is the brain a computer? file
537 2022-04-01 16:00  Zoom webinar  High-field Electron Transport and Interaction Induced Phenomena in 2D Materials file
536 2020-09-14 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond (Third Forum) file
535 2022-05-13 14:30  Zoom webinar  Topological Superconducting Spintronics Towards Zero-Power Computing Technologies file
534 2020-09-22 09:30  Zoom webinar  Physics and applications of soliton microcombs(Quantum- & Nano-Photonics) file
533 2021-06-08 10:00  Zoom webinar  Photonic crystal devices for sensing file
532 2020-08-17 20:00  Zoom webinar  Using magnetic tunnel junctions to compute like the brain file
531 2021-04-19 19:00  Zoom webinar  Evidence of Electrical Switching in Antiferromagnets and Coherent Spin Pumping file
530 2020-08-25 20:00  Zoom webinar  KAIST Global Forum for Spin and Beyond (Second Forum) file
529 2020-09-28 17:30  Zoom webinar  KAIST Global Forum for Spin and Beyond(Fourth Forum) file
528 2021-12-03 16:00  Zoom webinar  Nonequilibrium Heat Transport in Elemental Metals Probed by an Ultrathin Magnetic Thermometer file
527 2021-05-17 17:00  Zoom webinar  Spin current generation and detection in uniaxial antiferromagnets file
526 2021-12-03 14:30  Zoom webinar  Topological Spin Textures: Skyrmions and Beyond file
525 2021-04-09 10:00  Zoom webinar  Integrated Lithium Niobate Photonics file