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)
154 2023-05-15 16:00    Role of dark Higgs boson in DM physics and cosmology file
153 2023-05-17 14:00    Optical Response in the multilayer thin films
152 2023-05-17 16:30    Detecting Hidden Photon Dark Matter via the Excitation of Qubits file
151 2023-05-18 16:00    (광학분야 세미나)Dielectric metasurfaces for optimized optical system and spatial light modulators
150 2023-05-19 11:00    (응집물리 세미나)Dipole condensations in Tilted Bose-Hubbard Chains
149 2023-05-22 13:00    Design & Development of Electrochemical Biosensors for the Detection of T2DM Biomarkers
148 2023-05-26 11:00    (응집물리 세미나)Spectral Analyses of Stochastic Charge Trapping in Oxide Heterostructures file
147 2023-05-31 16:00    [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
146 2023-06-01 16:00    (광학분야 세미나)Quantum sensing using a squeezed light from hot Rb vapor
145 2023-06-01 16:00    Hall viscosity and topological phenomena
144 2023-06-08 16:00    Thermal decoupling in high-Tc cuprate superconductors
143 2023-06-14 16:00    [CAPP seminar] EMC at CERN file
142 2023-06-14 16:00    [High-Energy Theory Seminar]Vertex algebras and extended operators in 4d N=2 SCFTs
141 2023-06-15 16:00    [CAPP Seminar] Cryogenic electronics for ion traps file
140 2023-06-16 13:00    Quantum critical states under extreme conditions
139 2023-06-22 16:00    [CAPP Seminar] The muon g-2 puzzle file
138 2023-06-22 16:00    [High Energy Physics Seminar] The Branes Behind Generalized Symmetry Operators
137 2023-06-23 11:00    Visualizing orbital quantum phenomena at room temperature
136 2023-06-26 11:00    Quantum computing on magnetic racetracks with flying domain wall qubits
135 2023-06-30 11:00    The Dual Mode Quantum Computer file