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
279 2017-07-14 15:00  #1323 (E6-2. 1st fl.)  Chiral anomaly in disordered Weyl semimetals file
278 2018-07-09 14:00  #1323, E6-2  The principles of collective learning file
277 2019-07-08 14:00  E6, #1322  Ultrabroadband squeezed pulses and their relation to relativity file
276 2024-07-03 16:00  E6-2 #2502  [High Energy Theory Seminar] Holographic duals of Higgsed Dpb(BCD)
275 2019-07-31 16:00  E6-2, #1323  Features of ballistic superconducting graphene file
274 2019-07-30 16:00  #1323, E6-2  Dirac fermions and flat bands in correlated kagome metals file
273 2018-07-27 15:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
272 2018-07-27 15:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
271 2018-07-26 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Inflation in String Theory and Backreaction file
270 2018-07-26 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Inflation in String Theory and Backreaction file
269 2023-07-26 10:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Am Expansive Search for Dark Matter with ADMX and DM Radio
268 2024-07-25 16:00  Rm. 3441, E6-2 (Advanced Physics Lecture Hall)  Generation and Certification of Optical Quantum States for Information Processing file
267 2019-07-25 16:00  E6-2, #1323  Band topology of twisted bilayer graphene file
266 2024-07-23 16:00  KI Building(E4) Matrix Hall(2F)  Spin Conversion Research Towards Novel Spintronic Functionalities file
265 2024-07-22 14:00  E6-2 #3441  Nonthermal electronic orders in photo-doped Mott insulators
264 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
263 2019-07-21 12:00  E6-2,# 5318  Challenges and Opportunities in Theoretical Particle Physics 2019 file
262 2023-07-20 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
261 2018-07-02 15:00  Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus  High Precision Magnetic Field Measurement for the Muon g-2 Experiment file
260 2020-07-02 16:00  Zoom Video Conference Seminar  An irreversible qubit-photon coupling for the detection of itinerant microwave photons file