visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
seminar Date  
Date & Time Sep. 29 (Thu), 4:00 PM 
Venue E6-2. #2501(2nd fl.) 
Speaker Dr. Minu Kim, Institute for Basic Science, Seoul National University 

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 seminar Date Venue 제목
공지     Spring 2019: Physics Seminar Serises
공지     Spring 2019: Physics Colloquium
공지   Seminar Room #1323  Fall 2017: Physics Seminar Serises
공지   Seminar Room 1501  Fall 2017: Physics Colloquium
181   #1323(E6-2, 1st fl.)  Quantum information processing using quantum dots and photonic crystal cavities
180   #1323(E6-2. 1st fl.)  Isostatic magnetism
179   #1323(E6-2. 1st fl.)  Let there be topological superconductors
178   #1323(E6-2. 1st fl.)  Electronic quasiparticles in the quantum dimer model
177   #1323(E6-2. 1st fl.)  Low Dimensional Electrons: On the Road to Hybrid Quantum Systems
176   KAIST Natural Science Building (E6-5), EDU 3.0 Room(1st fl.)  Relational Logic (with applications to Quantum Mechanics, String Theory, Cosmology, Neutrino Oscillations, Statistical Mechanics)
175   E6-2(1st fl.), #1323  Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction
174   E6-2(1st fl) #1323  Quantum Electrical Transport in Topological Insulator Nanowires
173   Natual Scien Bldg.(E6)m #1501  Physics Colloquium : 2016 Fall file
172   #1323(E6-2, 1st fl.)  Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
171   E6-2. #2502(2nd fl.)  Entanglement probe of two-impurity Kondo physics
170   #1323(E6-2, 1st fl.)  Polarized 3He, Polarized Neutrons and New Interactions beyond the Standard Model
»   E6-2. #2501(2nd fl.)  Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip?
168   E6-2 #1323 (1st floor)  Large-scale Silicon Photonic MEMS Switches
167   E6-2, #1323  2016 Fall, Physics Seminar Serises file
166   E6-2. #1323(1st fl.)  “Symmetry and topology in transition metal dichalcogenide?”
165   E6-2. #1323(1st fl.)  “Tilt engineering of 4d and 5d transition metal oxides?”
164   1st fl. #1323(E6-2)  "Visualization of oxygen vacancy in motion and the interplay with electronic conduction"
163   E6-2. 1st fl. #1323  “Hybrid quantum systems with mechanical oscillators”
162   #1323,(E6-2, 1st fl.)  IMS and examples of the studies on optoelectronic materials