visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2022-11-18 14:30 
일시 Nov. 18 (Fri.), 02:30 PM 
장소 E6-2. 1st fl. #1323 & Zoom 
연사 Dr. Hyunsik Im (Dongguk University) 

SRC Seminar

 

 

Kondo cloud condensation in a highly-doped semiconductor metal

 

Dr. Hyunsik Im

Department of Physics and Semiconductor Science,

Dongguk University

 

Nov. 18 (Fri.), 02:30 PM

E6-2. 1st fl. #1323

https://kaist.zoom.us/j/89378880769

회의 ID: 893 7888 0769
암호: 909660

 

 

 

Abstract:

When a magnetic moment is embedded in a metal, it captures itinerant electrons to form the Kondo cloud with a size of a few micrometres. For a metal with dense magnetic impurities such that Kondo clouds overlap with each other, correlated ground states are formed. Here, we study this issue by performing electrical transport and tunneling DOS spectroscopy measurements in a crystalline silicon metal where localized magnetic moments exist. We detect the Kondo effect in the resistivity of the Si metal and an exotic BCS-like pseudogap in the DOS near the Fermi energy. The BCS-like DOS structure is tuned by applying an external magnetic field and transformed into a paramagnetic Coulomb gap. This phenomenon is interpreted as the formation of a correlated ground state of overlapping Kondo clouds (Kondo condensation). Our experimental findings demonstrate the observation of the magnetic version of BCS pair condensation and will be useful for understanding complex Kondo systems.

 

 

Contact: SunYoung Choi, (sun.0@kaist.ac.kr)

Center for Quantum Coherence in Condensed Matter, KAIST

번호 날짜 장소 제목
공지 2022-11-25 11:00  E6-2 #1323  [Update 세미나영상](응집물리 세미나) DMFT+ NRG: From models to real materials, from local to nonlocal correlations
100 2016-11-04 13:30  E6-2. #1323(1st fl.)  Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications
99 2015-08-03 10:30  E6-2, #1323 (Seminar Room)  Axion Search
98 2016-04-01 16:15  E6-2. 1st fl. #1501  Cotunneling drag effect in Coulomb-coupled quantum dots
97 2019-12-03 16:00  #1323, E6-2  Toward Quantum Materials with Correlated Oxides file
96 2017-03-02 16:00  #1323(E6-2. 1st fl.)  “Progress in the comparison of ARPES to DMFT for d and f strongly correlated electron systems”
95 2016-12-8 16:00  #1323(E6-2. 1st fl.)  Dynamical Resonance between Two Optical Cavities via Optomechanical Oscillator
94 2018-03-16 14:30  E6-2. 1st fl. #1323  산화물 다층박막에서의 다양한 물리현상 file
93 2018-03-16 14:30  E6-2. 1st fl. #1323  산화물 다층박막에서의 다양한 물리현상 file
92 2019-09-27 16:00  E6-2. 1st fl. #1323  0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
91 2021-06-11 14:30  Online seminar  Engineering sound waves and vibrations in multi-mode nanomechanical systems file
90 2019-04-19 11:00  #1323, E6-2  First-principles studies of semiconductors for solar cell applications file
89 2015-12-11 15:45  E6-2, #1323  Dynamical mean field theory studies on heavy fermion system
88 2017-04-28 14:30  E6-2. 1st fl. #1323  Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion
87 2016-04-12 16:00  E6-2. 1st fl. #1323  Confinement of Superconducting Vortices in Magnetic Force Microscopy
86 2021-05-14 16:00  Online seminar  Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
85 2015-09-07 15:00  E6-2. 1st fl. #1318  Advanced Optical Materials and Devices at NRL
84 2016-11-24 16:00  #1323(E6-2. 1st fl.)  Harmonic oscillator physics with single atoms in a state-selective optical potential
83 2022-07-14 13:30  E6 #1501 & Zoom  Electronic structure and anomalous transport properties of topological materials by first principle calculation
82 2019-10-16 16:00  #1323 (E6-2, 1st fl.)  Emergent black holes and monopoles from quantum fields file
81 2016-12-09 13:30  #1323(E6-2. 1st fl.)  Entanglement area law in strongly-correlated systems