Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
2016.04.27 15:34
| 날짜 | 2016-04-28 15:00 |
|---|---|
| 일시 | Apr. 28 (Thu.) 3PM |
| 장소 | #2501(E6-2. 2nd fl.) |
| 연사 | Dr. Chang Hee Sohn, SEOUL NATIONAL UNIVERSITY |
Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7
Apr. 28 (Thu.) 3PM, #2501(E6-2. 2nd fl.)
Dr. Chang Hee Sohn, SEOUL NATIONAL UNIVERSITY
We investigated strong lattice/spin/charge coupling in 5d pyrochlore Cd2Os2O7 by using optical spectroscopy. In the first part of the presentation, I’ll show strong effect of magnetic ordering on the charge dynamics of Cd2Os2O7. In this compound, we observe that all-in/all-out antiferromagnetic ordering induces a Lifshitz-type metal-insulator transition that magnetic ordering gradually annihilates the Fermi surface. In the second part of the talk, I’ll present strong spin-lattice coupling in Cd2Os2O7. We observed large renormalization of phonon frequencies below all-in/all-out antiferromagnetic ordering temperature, which can be understood in terms of modulation of Heisenberg exchange interaction and single ion anisotropy. Relevance to expected novel phenomena and future work will be discussed.
Contact: Eun Gook Moon, Physics Dept., (egmoon@kaist.ac.kr)
댓글 0
| 번호 | 날짜 | 장소 | 제목 |
|---|---|---|---|
| 144 | 2015-03-13 14:00 | Connect Room, KI Bldg. |
The 15th Innovative Workshop on Soft/Bio Materials
 |
| 143 | 2022-09-21 16:00 | College of Natural Science E6-2, Rm. 1323 |
Materials and Device Nanofabrication of Optical Metasurfaces
|
| 142 | 2023-09-14 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP seminar] Dark matter searches in Water Cherenkov Detectors
|
| 141 | 2023-05-15 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
Role of dark Higgs boson in DM physics and cosmology
|
| 140 | 2023-09-18 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP Seminar] Searching for axions in quantum vacuum birefringence
|
| 139 | 2023-10-11 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP seminar] Particle Physics with Neutrinos
|
| 138 | 2023-09-21 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP seminar] Axion Magnetic Resonance
|
| 137 | 2023-06-14 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP seminar] EMC at CERN
|
| 136 | 2024-01-25 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus | [CAPP seminars] Detecting Gravitational Waves by Elecromagnetic Cavity |
| 135 | 2023-03-27 15:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
A coherent mechanical oscillator pumped by a suspended quantum dot
|
| 134 | 2023-03-30 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
Detecting axions with chiral magnetic effects
|
| 133 | 2023-07-26 10:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus | [CAPP Seminar] Am Expansive Search for Dark Matter with ADMX and DM Radio |
| 132 | 2023-06-22 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP Seminar] The muon g-2 puzzle
|
| 131 | 2023-06-15 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP Seminar] Cryogenic electronics for ion traps
|
| 130 | 2023-12-14 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
Superconducting qubits for large-scale quantum computers
|
| 129 | 2023-07-20 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
[CAPP Seminar] Cosmoparticle Physics of Dark Universe
|
| 128 | 2022-07-21 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus |
Quintessential axions
|
| 127 | 2020-10-15 16:00 | CAPP Seminar Room #C303, Creation Hall (3F), KAIST Munji Campus |
Graphene-based Josephson junction microwave bolometer
|
| 126 | 2016-06-01 10:30 | BK21 Conference Room (#1318, E6-2) | Welcome to Nature Photonics |
| 125 | 2015-08-04 11:00 | B501, Room Red, KI bldg. 5nd fl. | Propagation of ultrasound through two- and three-dimensional strongly scattering media |