visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-09-29 16:00 
연사  
장소 E6-2. #2501(2nd fl.) 

Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?

 

Sep. 29 (Thu), 4:00 PM, E6-2. #2501(2nd fl.)
Dr. Minu Kim, Institute for Basic Science, Seoul National University

 

Recently, we found novel routes to experimentally control the phase diagram in the perovskite bismuthate BaBiO3 (BBO), the parent compound of several high-Tc oxide superconductors. Numerous experimental and theoretical studies have sought to gain insight into the mechanisms that control the physics of these bismuthates [1,2]; to date, however, only limited progress has been made in hole-doped bulk samples. Here, we present our recent progress on exploration of the novel phase diagram of BBO via thickness and doping controls. We revealed that a minimum length scale to sustain a charge density wave order in BBO films by thickness control [3]. Furthermore, the electronic and structural properties of BBO were strongly dependent on oxygen deficiency, disclosed by the combination of in situ spectroscopic techniques and first-principles calculations. Our approaches introduce independent control parameters to explore the BBO phase diagram, and may also provide a useful guideline to study the recently predicted topological phases in electron-doped bismuthates [4].

 

[1] A. W. Sleight, J. L. Gillson, P. E. Bierstedt, Solid State Commun. 17, 27 (1975)
[2] R. J. Cava et al., Nature 328, 814 (1988)
[3] G. Kim et al., Phys. Rev. Lett. 115, 226402 (2015)
[4] B. Yan et al., Nat. Phys. 9, 709 (2013)

 

Contact: MyungJoon Han, Physics Dept., (mj.han@kaist.ac.kr)

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
432 2018-10-04 16:00    Engineering light absorption in an ultrathin semiconductor metafilm file
431 2018-10-11 16:00    Dirac electrons in a graphene quasicrystal file
430 2018-10-12 14:30    Quantum Advantage in Learning Parity with Noise file
429 2018-10-12 16:00    Direct observation of a two-dimensional hole gas at oxide interfaces file
428 2018-10-15 16:00    Universal properties of macroscopic current-carrying systems file
427 2018-10-16 10:00    Capturing protein cluster dynamics and gene expression output in live cells file
426 2018-10-18 10:00    Understanding membrane protein folding using single-molecule force techniques file
425 2018-10-18 16:00    Applications of nonlinear optics for condensed matter researches file
424 2018-10-19 10:00    Energy conversion processes during magnetic reconnection in a laboratory plasma file
423 2018-10-24 10:30    Photonic integration of next-generation clocks and Hertz-absolute-accuarcy optical frequenncy synthesizers file
422 2018-10-25 16:00    Abelian and non-Abelian dark photons file
421 2018-10-26 16:00    Coexisting triple-point and nodal-line topological magnons and thermal Hall effect in pyrochlore iridates file
420 2018-11-01 16:00    Direct holography from a single snapshot file
419 2018-11-08 16:00    Conformality lost file
418 2018-11-09 14:30    Moiré superlattices – from twisted bilayer graphene to quasicrystal file
417 2018-11-09 16:00    Quantum sensing and imaging with diamond defect centers for nano-scale spin physics file
416 2018-11-21 15:00    Engineering topological quantum physics at the atomic scale file
415 2018-11-22 15:00    Experimental and Computational Study on Physical Properties based on Granular System file
414 2018-11-23 15:00    Entanglement string and Spin Liquid with Holographic duality file
413 2018-11-29 16:00    양자 칸델라 실현을 위한 단일 광자 발생장치 개발 file