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)
354 2019-09-27 14:30    Spin-charge conversion in topological insulators for spintronic applications file
353 2019-09-27 16:00    0D/1D/2D/3D III-V materials grown by MBE for Optelectronics file
352 2019-10-15 16:00    Moiré superlattices and graphene quasicrystal file
351 2019-10-16 16:00    Emergent black holes and monopoles from quantum fields file
350 2019-10-17 16:00    Top down manipulation of Waves : From Metamaterials, Correlated Disorder, Quantum Analogy, to Digital Processing file
349 2019-10-25 15:00    Physics Seminar file
348 2019-10-29 10:00    Unconventional Spin Transport in Quantum Materials file
347 2019-10-29 14:30    Quantum sensing file
346 2019-10-29 16:00    Particles and Gravity via String Geometry file
345 2019-10-31 10:00    Kondo meets Hubbard: Impurity physics for correlated lattices file
344 2019-11-01 14:30    Squeezing the best out of 2D materials file
343 2019-11-01 16:00    Electron transport through weak-bonded contact metal with low dimensional nano-material file
342 2019-11-05 16:00    Study on nanomaterials by the development of ultrahigh resolution laser-photoelectron microscopy (PEEM) file
341 2019-11-07 16:00    Integrated quantum photonics with solid-state quantum emitters file
340 2019-11-14 16:00    Semi-classical model of polariton propagation file
339 2019-11-20 16:00    Correlation between superconducting transition temperature and critical current density in irradiated iron-based superconductors file
338 2019-11-28 16:00    Generation of coherent EUV emissions using ultrashort laser pulses file
337 2019-12-03 16:00    Toward Quantum Materials with Correlated Oxides file
336 2019-12-05 16:00    Subwavelenth Photonic Devices: From Single Photon Sources to Solar Cell file
335 2019-12-13 13:00    Computational Material Designs: Current Status and Future Directions file