visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-09-29 16:00 
일시 Sep. 29 (Thu), 4:00 PM 
장소 E6-2. #2501(2nd fl.) 
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)

번호 날짜 장소 제목
525 2009-02-23 16:00  E6, 1501  Physics Colloquium : 2009 Spring file
524 2009-09-07 16:00  E6, 1501  Physics Colloquium : 2009 Fall file
523 2009-10-21 16:00  E6, 1501  Interdimensional Universality of Dynamic Interfaces
522 2010-02-08 16:00  E6, 1501  Physics Ciolloquium : 2010 Spring file
521 2010-02-14 16:00  E6, 1501  Physics Colloquium - 2011 Spring file
520 2010-09-06 16:00  E6, 1501  Physics Colloquium : 2010 Fall file
519 2011-05-16 16:00  E6, 1501  Photonics with surface plasmon polaritons
518 2011-09-03 16:00  E6, 1501  Physics Colloquium : 2011 Fall file
517 2012-02-13 16:00  E6, 1501  Physics Colloquium : 2012 Spring
516 2012-04-02 16:00  E6, 1501  A new route to ferroelectricity in magnetic spinels: a case of Co2MnO4
515 2013-03-11 16:00  E6, 1501  Physics Colloquium : 2013 Spring
514 2013-09-09 16:00  E6, 1501  Physics Colloquium : 2013 Fall
513 2014-03-10 16:00  E6, 1501  Physics Colloquium : 2014 Spring file
512 2014-05-28 17:00  KI Building, Matrix Hall  부품소재산업이 미래다
511 2014-12-22 14:00  E6, Rm1319  Dynamics of molecular motors: Power stroke vs Brownian ratchet file
510 2015-03-04 12:00  1323호, E6-2  Bioimaging and Biosensing Using Near-Infrared Fluorescence file
509 2015-03-09 16:00  E6, 1501  Physics Colloquium : 2015 Spring file
508 2015-03-13 14:00  Connect Room, KI Bldg.  The 15th Innovative Workshop on Soft/Bio Materials file
507 2015-06-03 12:00  Room 101, E11  The First Wednesday Multidisciplinary Forum file
506 2015-07-15 14:00  E6-2,1323  Electronic and optical properties of titanate-based oxide superlattices