visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2023-07-10 16:00 
일시 July 10th(Mon), 16:00 
장소 E6, #1323 
연사 Jonathan Denlinger (Advanced Light Source, Lawrence Berkeley National Lab) 

물리학과에서는 아래와 같이 세미나를 개최하고자 하오니 관심있는 분들의 많은 참석 부탁드립니다.

 

Date: 16:00 pm, 10th July (Mon)
 
Place: E6, #1323
 
Speaker: Jonathan Denlinger (Advanced Light Source, Lawrence Berkeley National Lab)
 
Title: Electronic structures of magnetic and non-magnetic ordering in d- and f-electrons systems
 
Abstract: 

Two rather disparate topics of ferromagnetism in the d-electron triple-layer strontium ruthenate, Sr4Ru3O10 and of a non-magnetic “hidden” order (HO) in the f-electron URu2Si2, are shown to have a common theme of the importance of van Hove singularities exhibiting strong electron correlation coherence behavior.

      For Sr4Ru3O10, spin- and angle-resolved photoemission (ARPES) reveal the low temperature electronic structure to be dominated by “two” strong intensity narrow bands at 30 meV below the Fermi-level at the Brillouin zone center and the zone boundary, but with opposite spin-polarization [1].  Both peaks exhibit dramatic temperature-dependent amplitude changes upon warming to the Curie temperature, which is proposed to relate to Hund-metal electron correlations.

     For URu2Si2, a shallow saddle-point band at the zone boundary N-point is proposed [2] to govern the underlying physics of a 35-year old puzzle of a non-magnetic 17.5K phase transition. Comparative changes of the N-point electronic structure for the various chemical-doping phase diagrams that do exhibit magnetic ordering provides proof of this model, including ARPES circular dichroism of an incommensurate-nested scattering process that demonstrates the existence of a helical ordering of f-orbitals in the HO phase. 

 

[1] P. Ngabonziza, J. D. Denlinger, A. Fedorov, G. Cao, J. W. Allen, G. Gebreyesus, and R. M. Martin, arXiv:2305.07222.

 

[2] J. D. Denlinger et al., Electronic Structure 4, 013001 (2022).

 
번호 날짜 장소 제목
264 2019-07-30 16:00  #1323, E6-2  Dirac fermions and flat bands in correlated kagome metals file
263 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
262 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
261 2018-07-26 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Inflation in String Theory and Backreaction file
260 2018-07-26 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Inflation in String Theory and Backreaction file
259 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
258 2019-07-25 16:00  E6-2, #1323  Band topology of twisted bilayer graphene file
257 2022-07-21 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  Quintessential axions file
256 2019-07-21 12:00  E6-2,# 5318  Challenges and Opportunities in Theoretical Particle Physics 2019 file
255 2023-07-20 16:00  CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus  [CAPP Seminar] Cosmoparticle Physics of Dark Universe file
254 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
253 2020-07-02 16:00  Zoom Video Conference Seminar  An irreversible qubit-photon coupling for the detection of itinerant microwave photons file
252 2023-07-19 16:00  E6-2, #1323  [High-Energy Theory Seminar]Deriving the Simplest Gauge-String Duality
251 2023-07-18 11:00  E6-2, #1323  Non-Hermitian Casimir Effect of Magnons
250 2018-07-13 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Loop Induced Single Top Partner Production and Decay at the LHC
249 2023-07-12 11:00  E6-2, #1323  Study of spin-1/2 antiferromagnetic kagome Heisenberg model by symmetric projected entangled simplex states
248 2023-07-11 11:00  E6-2, #1323  Ordered phases, non-Fermi liquid, and quantum criticality driven by entanglement between multipoles and conduction electrons
247 2024-07-10 16:00  E6-2 #2502  [High Energy Theory Seminar] The Weak Gravity Conjecture in Perturbative String Theory
» 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