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)
454 2018-05-17 13:30    Quantum Spin Liquid in Kitaev Materials file
453 2018-05-29 16:00    Investigation on metal nanostructure/semiconductor junction and its applications file
452 2018-05-31 16:00    Dynamic control of optical properties with gated-graphene metamaterials file
451 2018-06-01 11:00    Topological phases in low-dimensional quantum materials file
450 2018-06-14 10:00    Phonons and polariton-like particles in trapped ions for quantum computation and quantum simulation file
449 2018-06-18 10:00    Rydberg electromagnetically induced transparency and microwave-to-optical conversion using Rydberg atoms file
448 2018-06-22 10:00    Success in Research Career file
447 2018-06-22 16:00    Tuning functional properties of BiFeO3 films using strain and growth chemistry file
446 2018-07-02 15:00    High Precision Magnetic Field Measurement for the Muon g-2 Experiment file
445 2018-07-09 14:00    The principles of collective learning file
444 2018-07-12 17:00    The MilliQan Experiment: Search for Milli-Charged Particles at the LHC
443 2018-07-13 14:00    Loop Induced Single Top Partner Production and Decay at the LHC
442 2018-07-26 14:00    Inflation in String Theory and Backreaction file
441 2018-07-27 13:30    Magnetic reversal of artificial spin ice file
440 2018-07-27 15:00    Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
439 2018-08-01 11:00    Future of AI: Is the brain a computer? file
438 2018-09-04 14:30    Ultrafast time- and angle-resolved photoemission spectroscopy (tr-ARPES) with extreme ultraviolet laser pulses file
437 2018-09-05 16:00    Shining a light on fractional excitations file
436 2018-09-07 15:00    Recent developments in density functional theory: From new functionals to the nature of the chemical bond file
435 2018-09-20 16:00    Toward Cancer Treatment Using Terahertz Radiation: Demethylation of Cancer DNA file