1
|
Terashige T, Ono T, Miyamoto T, Morimoto T, Yamakawa H, Kida N, Ito T, Sasagawa T, Tohyama T, Okamoto H. Doublon-holon pairing mechanism via exchange interaction in two-dimensional cuprate Mott insulators. SCIENCE ADVANCES 2019; 5:eaav2187. [PMID: 31187057 PMCID: PMC6555625 DOI: 10.1126/sciadv.aav2187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 05/02/2019] [Indexed: 06/09/2023]
Abstract
Coupling of charge and spin degrees of freedom is a critical feature of correlated electron oxides, as represented by the spin-related mechanism of a Cooper pair under high-T c superconductivity. A doublon-holon pair generated on an antiferromagnetic spin background is also predicted to attract each other via the spin-spin interaction J, similar to a Cooper pair, while its evidence is difficult to obtain experimentally. Here, we investigate such an excitonic effect by electroreflectance spectroscopy using terahertz electric field pulses in undoped cuprates: Nd2CuO4, Sr2CuO2Cl2, and La2CuO4. Analyses of the spectral changes of reflectivity under electric fields reveal that the splitting of odd-parity and even-parity excitons, a measure of doublon-holon binding energy, increases with J. This trend is reproduced by t-J-type model calculations, providing strong evidence of the spin-related doublon-holon pairing. Agreement with the calculations supports the s-wave symmetry of the doublon-holon pair in contrast to the d-wave Cooper pair in doped cuprates.
Collapse
Affiliation(s)
- T. Terashige
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Chiba 277-8568, Japan
| | - T. Ono
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
| | - T. Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
| | - T. Morimoto
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
| | - H. Yamakawa
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
| | - N. Kida
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
| | - T. Ito
- National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8565, Japan
| | - T. Sasagawa
- Laboratory for Materials and Structures, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - T. Tohyama
- Department of Applied Physics, Tokyo University of Science, Tokyo 125-8585, Japan
| | - H. Okamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Chiba 277-8568, Japan
| |
Collapse
|
2
|
Miyamoto T, Matsui Y, Terashige T, Morimoto T, Sono N, Yada H, Ishihara S, Watanabe Y, Adachi S, Ito T, Oka K, Sawa A, Okamoto H. Probing ultrafast spin-relaxation and precession dynamics in a cuprate Mott insulator with seven-femtosecond optical pulses. Nat Commun 2018; 9:3948. [PMID: 30258055 PMCID: PMC6158258 DOI: 10.1038/s41467-018-06312-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 08/23/2018] [Indexed: 11/18/2022] Open
Abstract
A charge excitation in a two-dimensional Mott insulator is strongly coupled with the surrounding spins, which is observed as magnetic-polaron formations of doped carriers and a magnon sideband in the Mott-gap transition spectrum. However, the dynamics related to the spin sector are difficult to measure. Here, we show that pump-probe reflection spectroscopy with seven-femtosecond laser pulses can detect the optically induced spin dynamics in Nd2CuO4, a typical cuprate Mott insulator. The bleaching signal at the Mott-gap transition is enhanced at ~18 fs. This time constant is attributable to the spin-relaxation time during magnetic-polaron formation, which is characterized by the exchange interaction. More importantly, ultrafast coherent oscillations appear in the time evolution of the reflectivity changes, and their frequencies (1400-2700 cm-1) are equal to the probe energy measured from the Mott-gap transition peak. These oscillations can be interpreted as the interference between charge excitations with two magnons originating from charge-spin coupling.
Collapse
Affiliation(s)
- T Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - Y Matsui
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - T Terashige
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Chiba, 277-8568, Japan
| | - T Morimoto
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - N Sono
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - H Yada
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan
| | - S Ishihara
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan
| | - Y Watanabe
- Department of Chemistry, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - S Adachi
- Department of Chemistry, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan
| | - T Ito
- National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan
| | - K Oka
- National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan
| | - A Sawa
- National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan
| | - H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba, 277-8561, Japan.
- AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Chiba, 277-8568, Japan.
| |
Collapse
|
3
|
|
4
|
Buhler C, Yunoki S, Moreo A. Magnetic domains and stripes in a spin-fermion model for cuprates. PHYSICAL REVIEW LETTERS 2000; 84:2690-2693. [PMID: 11017301 DOI: 10.1103/physrevlett.84.2690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/1999] [Indexed: 05/23/2023]
Abstract
Monte Carlo simulations applied to a model of interacting fermions and classical spins show the existence of antiferromagnetic spin domains and charge stripes upon hole doping. The stripes have a filling of approximately 1/2 hole per site, and they separate spin domains with a pi phase shift among them. The observed stripes run either along the x or y axes. No particular boundary conditions or external fields are needed to stabilize these structures. When magnetic incommensurate peaks are observed at momentum pi(1,1-delta), charge incommensurate peaks appear at (0,2delta). The charge fluctuations responsible for the stripe formation also induce a pseudogap in the density of states.
Collapse
Affiliation(s)
- C Buhler
- Department of Physics, National High Magnetic Field Lab and MARTECH, Florida State University, Tallahassee, Florida 32306, USA
| | | | | |
Collapse
|
5
|
Quijada MA, Tanner DB, Chou FC, Johnston DC, Cheong S. Optical properties of single-crystal La2CuO4+ delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:15485-15503. [PMID: 9980906 DOI: 10.1103/physrevb.52.15485] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
6
|
Igarashi J, Fulde P. Drude weight and optical conductivity of doped antiferromagnets. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:12713-12722. [PMID: 10007642 DOI: 10.1103/physrevb.48.12713] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
7
|
Bang Y, Kotliar G. Optical conductivity in the t-J model: Slave-boson, large-N technique. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:9898-9901. [PMID: 10007254 DOI: 10.1103/physrevb.48.9898] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
8
|
Yonemitsu K, Bishop AR. Optical excitations along CuO chains in copper oxides. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:3349-3355. [PMID: 10008762 DOI: 10.1103/physrevb.48.3349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
9
|
Poilblanc D, Ziman T, Schulz HJ, Dagotto E. Dynamical properties of a single hole in an antiferromagnet. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:14267-14279. [PMID: 10005772 DOI: 10.1103/physrevb.47.14267] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
10
|
Calvani P, Capizzi M, Donato F, Lupi S, Maselli P, Peschiaroli D. Observation of a midinfrared band in SrTiO3-y. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:8917-8922. [PMID: 10004938 DOI: 10.1103/physrevb.47.8917] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
11
|
Lorenzana J, Yu L. Optical conductivity of La2-xSrxCuO4 and soft electronic modes. PHYSICAL REVIEW LETTERS 1993; 70:861-864. [PMID: 10054222 DOI: 10.1103/physrevlett.70.861] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
12
|
Ohta Y, Tsutsui K, Koshibae W, Shimozato T, Maekawa S. Evolution of the in-gap state in high-Tc cuprates. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:14022-14033. [PMID: 10003472 DOI: 10.1103/physrevb.46.14022] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
13
|
Zhong J, Schüttler H. Polaronic anharmonicity in the Holstein-Hubbard model. PHYSICAL REVIEW LETTERS 1992; 69:1600-1603. [PMID: 10046263 DOI: 10.1103/physrevlett.69.1600] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
14
|
Lupi S, Calvani P, Capizzi M, Maselli P, Sadowski W, Walker E. Infrared optical conductivity of the Nd-Ce-Cu-O system. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:12470-12477. [PMID: 10001284 DOI: 10.1103/physrevb.45.12470] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
15
|
Dagotto E, Moreo A, Ortolani F, Poilblanc D, Riera J. Static and dynamical properties of doped Hubbard clusters. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:10741-10760. [PMID: 10000980 DOI: 10.1103/physrevb.45.10741] [Citation(s) in RCA: 112] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
16
|
Schüttler H, Fedro AJ. Copper-oxygen charge excitations and the effective-single-band theory of cuprate superconductors. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 45:7588-7591. [PMID: 10000566 DOI: 10.1103/physrevb.45.7588] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
17
|
Poilblanc D, Dagotto E. Optical mass in the t-J model. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:466-469. [PMID: 9998280 DOI: 10.1103/physrevb.44.466] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
18
|
Leng JM, Ginder JM, Farneth WE, Shah SI, Epstein AJ. Absorption and photoinduced-absorption spectroscopy in semiconducting YBa2Cu3O6+x. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 43:10582-10588. [PMID: 9996786 DOI: 10.1103/physrevb.43.10582] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|