• 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

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.



[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
252 2020-07-02 16:00  Zoom Video Conference Seminar  An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
251 2023-07-19 16:00  E6-2, #1323  [High-Energy Theory Seminar]Deriving the Simplest Gauge-String Duality
250 2023-07-18 11:00  E6-2, #1323  Non-Hermitian Casimir Effect of Magnons
249 2018-07-13 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Loop Induced Single Top Partner Production and Decay at the LHC
248 2023-07-12 11:00  E6-2, #1323  Study of spin-1/2 antiferromagnetic kagome Heisenberg model by symmetric projected entangled simplex states
» 2023-07-11 11:00  E6-2, #1323  Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
246 2023-07-10 16:00  E6, #1323  Electronic structures of magnetic and non-magnetic ordering in d- and f-electrons systems
245 2019-07-10 16:00  Academic Cltural Complex (E9) 5층 스카이라운지  Public Lectures file
244 2016-07-28 16:00  #1323(E6-2. 1st fl.)  Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
243 2022-07-14 15:00  E6 #1501 & Zoom  Pure two-dimensional quantum electron liquid and its phase transition
242 2022-07-14 14:15  E6 #1501 & Zoom  Hund and electronic correlations in ruthenium-based systems
241 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
240 2016-07-08 14:00  #1323(E6-2. 1st fl.)  Electronic quasiparticles in the quantum dimer model
239 2016-07-08 11:00  #1323(E6-2. 1st fl.)  Isostatic magnetism
238 2016-07-07 14:00  #1323(E6-2. 1st fl.)  Let there be topological superconductors
237 2019-07-03 15:00  E6-2, 2501  Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file
236 2023-07-14 11:00  E6-2 #1501  Interfaces engineering of thin film oxides
235 2019-01-23 16:00  Rm. C303, Creation Hall (3F), Munji Campus  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
234 2020-01-17 16:00  #1323, E6-2  Symmetry Breaking and Topology in Superfluid 3He file
233 2019-01-09 16:00  E6-2. 2nd fl. #2501  Molecular Mott state in the deficient spinel GaV4S8 file