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
188 2020-10-15 17:00  https://bit.ly/3ndIiJn  Time crystals, quasicrystals, and time crystal dynamics in the superfluid universe file
187 2022-03-31 10:00  E6 #1501/zoom  Weiss fields for Quantum Spin Dynamics file
186 2022-03-29 10:00  E6 #1501/zoom, E6 #2502/zoom  Non-reciprocal phase transitions file
185 2024-05-16 14:30  E6-2 #2502 & Zoom  [Astrophysics Seminar] Observational Cosmology with Superconducting Sensors
184 2024-05-30 10:00  E6-2, #2501  Quasiperiodic Effects in Quasicrystals
183 2018-11-09 14:30  E6-2. 1st fl. #1323  Moiré superlattices – from twisted bilayer graphene to quasicrystal file
182 2015-10-16 15:00  E6-2, 5th fl. #5318  High Magnetic Fields to Probe the sub-eV range of Particle/Astroparticle Physics - From the OSQAR experiments at CERN up to new perspectives at LNCMI-Grenoble
181 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
180 2016-06-01 10:30  BK21 Conference Room (#1318, E6-2)  Welcome to Nature Photonics
179 2018-05-11 16:00  E6-2. 1st fl. #1323  암페어 단위 재정의와 단전자 펌프 소자 개발 file
178 2016-04-26 16:00  #1323(1st Floor. E6-2)  Transport spectroscopy for electronic bands in carbon-based nanomaterials with weak-bond contacts
177 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
176 2022-08-12 10:00  E6-1 #1323  Twisted Bilayer Magnets file
175 2022-10-06 13:00  E6 #1323  Counting States with Global Symmetry
174 2019-06-12 15:00  Rm# 1323, E6-2  The relation between free and interacting fermionic SPT phases file
173 2016-09-29 16:00  E6-2. #2501(2nd fl.)  Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
172 2017-04-28 16:00  #1323 (E6-2. 1st fl.)  Carbon nanotubes coupled to superconducting impedance matching circuits
» 2023-07-11 11:00  E6-2, #1323  Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
170 2019-07-30 16:00  #1323, E6-2  Dirac fermions and flat bands in correlated kagome metals file
169 2017-11-03 14:30  #1323 (1st fl., E6-2.)  Quantum Resistor-Capacitor Circuit with Majorana Edge States file