Dimer Physics and Superconductivity in La3Ni2O7
2024.01.09 15:35
날짜 | 2024-01-16 14:00 |
---|---|
일시 | Jan.16th (Tue.),14:00 |
장소 | E6-2, #1323 |
연사 | Siheon Ryee (University of Hamburg, Germany) |
Nickelated 초전도체에 관한 세미나를 개최하오니, 관심 있는 분들의 많은 참석 바랍니다.
- Date & Time: Jan. 16th (Tue.), 2024 / 14:00 ~ 16:00
- Place: E6-2 (Rm. 1323)
- Title : Dimer Physics and Superconductivity in La3Ni2O7
- Lecturer : Siheon Ryee [University of Hamburg, Germany]
- Abstract:
The recent discovery of superconductivity with Tc ~ 80 K in the bilayer nickelate La3Ni2O7 under high pressure heralds a new class of high-Tc superconductors. The most notable feature of this material is a strong interlayer electronic coupling unlike many unconventional superconductors. In this respect, central questions concern “How does the interlayer coupling affect the low-energy physics?" and “Is the interlayer coupling a friend or foe of superconductivity?". In this talk, I will demonstrate using a cluster dynamical mean-field theory that nonlocal self-energy driven by the interlayer coupling in La3Ni2O7 induces a Lifshitz transition of Fermi surface topology. By solving a relevant gap equation, I will further argue that superconductivity is promoted by this “dimer” electronic correlation. The underlying mechanism is the quenching of a strong ferromagnetic channel resulting from the Fermi surface change. This finding unveils the role of interlayer coupling in La3Ni2O7 and potentially paves the way to designing higher-Tc nickelates.
댓글 0
번호 | 날짜 | 장소 | 제목 |
---|---|---|---|
136 | 2023-03-27 15:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus | A coherent mechanical oscillator pumped by a suspended quantum dot |
135 | 2024-01-25 16:00 | CAPP Seminar Room C303, Creation Hall, KAIST Munji Campus | [CAPP seminars] Detecting Gravitational Waves by Elecromagnetic Cavity |
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 |
124 | 2019-07-10 16:00 | Academic Cltural Complex (E9) 5층 스카이라운지 | Public Lectures |
123 | 2016-10-18 13:30 | 1st fl. #1323(E6-2) | "Visualization of oxygen vacancy in motion and the interplay with electronic conduction" |
122 | 2016-12-12 13:30 | 1:30p.m. #1323(E6-2. 1st fl.) | “Possible symmetry in the phase diagrams of electron- & hole-doped cuprate high-Tc superconductors” |
121 | 2015-03-04 12:00 | 1323호, E6-2 | Bioimaging and Biosensing Using Near-Infrared Fluorescence |
120 | 2020-10-15 16:00 | (https://kaist.zoom.us/j/93997220310) | Towards resource-efficient and fault-tolerant quantum computation with nonclassical light |
119 | 2018-02-12 15:00 | #C303, (Creation Hall 3F, KAIST Munji Campus) | The recent result of XMASS Experiment |
118 | 2019-12-27 15:00 | #5318, E6-2 | The superconducting order parameter puzzle of Sr2RuO4 |
117 | 2019-05-21 16:00 | #5318, E6-2 | Classification of flat bands according to the band-crossing singularity of Bloch wave functions |