장소 | E6-2. #2501(2nd fl.) |
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일시 | Sep. 29 (Thu), 4:00 PM |
연사 | 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)
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318 | Mar. 24 (Fri.), 2:30 PM | #1323 (1st fl. E6-2). | Dr. MahnSoo Choi | Topological Dynamics |
317 | Nov. 3 (Fri.), 2:30 PM | #1323 (1st fl., E6-2.) | Dr. MinChul Lee(Department of Applied Physics, Kyung Hee Univ.) |
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315 | June 14, 2016 (Tue) 3PM | #1323 (E6-2 1st fl.) | Prof. Seungyong Hahn, Florida State University | No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets |
314 | April 13 (Fri.), 10am | #1323 (E6-2, 1st fl.) | Dr. Sungkun Hong |
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313 | April 11 (Wed), 1:30pm | #1323 (E6-2, 1st fl.) | Dr. Yongsoo Yang |
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312 | April 11 (Wed), 4:00pm | #1323 (E6-2, 1st fl.) | Dr. Young-Sik Ra |
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311 | October 16 (Wed), 4:00pm | #1323 (E6-2, 1st fl.) | Dr. Jaewon Song |
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310 | October 29 (Tue.), 10:00am | #1323 (E6-2, 1st fl.) | Prof. Se Kwon Kim |
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309 | October 29 (Tue.), 4:00pm | #1323 (E6-2, 1st fl.) | Dr. Seung-Joo Lee |
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308 | October 31 (Thu.), 10:00am | #1323 (E6-2, 1st fl.) | Dr. Seung-Sup Lee |
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307 | Jun. 2 (Fri.), 4:00 PM | #1323 (E6-2. 1st fl.) | Dr. Sang Wook Kim |
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306 | Apr. 28 (Fri.), 04:00 PM | #1323 (E6-2. 1st fl.) | Dr. Minkyung Jung Research Institute, DGIST | Carbon nanotubes coupled to superconducting impedance matching circuits |
305 | July. 14 (Fri.), 3:00 PM | #1323 (E6-2. 1st fl.) | Dr. Jun Hyun Lee / University of Maryland |
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304 | Sep. 12 (Tue.), 4 PM | #1323 (E6-2. 1st fl.) | Prof. Yi. Zhou (The Zhejiang Univ.) |
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303 | Sep. 13 (Wed.), 4 PM | #1323 (E6-2. 1st fl.) | Prof. Yi. Zhou (The Zhejiang Univ.) |
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