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
482 2019-07-16 16:00  Rm. 1323 (E6-2)  2019 Physics Distinguished Lecture file
481 2019-08-19 10:00  Rm. 1322, E6-2  Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file
480 2019-06-12 15:00  Rm# 1323, E6-2  The relation between free and interacting fermionic SPT phases file
479 2020-11-17 12:00  Online(Zoom)  Quantum- & Nano-Photonics" 세미나 시리즈 file
478 2021-04-02 14:30  Online(Zoom)  Quantum computing and entanglement generation using trapped ions and photons
477 2021-04-02 16:00  Online(Zoom)  Van der Waals heterostructures for orbital gating-based phototransistors and electronic spectroscopy
476 2020-11-26 16:00  Online(Zoom)  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
475 2021-03-25 16:00  Online Seminar (Zoom)  Search for dark matter axion with Rydberg atoms file
474 2022-05-27 11:00  Online seminar  Current Status and Future Plans of ADMX file
473 2022-04-15 11:00  Online seminar  (응집물리 세미나) First-principles studies of polar oxides and their applications file
472 2022-06-03 09:30  Online seminar  (Quantum-&Nano-Photonics Webinar) Seeing glass in a new light: reimagine chalcogenide photonics file
471 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
470 2022-03-18 11:00  Online seminar  (응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids file
469 2021-05-14 14:30  Online seminar  Electrically tunable spin valve effect in vertical van-der-Waals magnetic tunnel junctions file
468 2021-07-29 14:00  Online seminar  Gravitationally Induced Dark Sector and Inflationary Dynamics file
467 2021-01-28 18:00  Online Seminar  Quantum metamaterials: concept, theory, prototypes and possible applications file
466 2021-06-11 14:30  Online seminar  Engineering sound waves and vibrations in multi-mode nanomechanical systems file
465 2021-06-11 16:00  Online seminar  Pseudogap in surface-doped black phosphorus file
464 2021-05-14 16:00  Online seminar  Spatial and temporal separation of environmental dephasing sources from solid-state quantum emitters file
463 2022-05-19 15:00  online  (광학분야 특별세미나)Development of a multimodal optical system for improved disease diagnosis