Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder
We construct a four-leg spin-1/2 t – J type model to simulate a doped two-leg spin-1 antiferromagnetic Heisenberg ladder. Employing renormalized mean-field theory with simple Gutzwiller factors, we obtain three degenerate superconducting states with different pairing symmetry. Through improving the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2019-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ab5603 |
| _version_ | 1797750445090799616 |
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| author | Jie Hou Ting-Kuo Lee Yaowu Guo Jie Lou Yan Chen |
| author_facet | Jie Hou Ting-Kuo Lee Yaowu Guo Jie Lou Yan Chen |
| author_sort | Jie Hou |
| collection | DOAJ |
| description | We construct a four-leg spin-1/2 t – J type model to simulate a doped two-leg spin-1 antiferromagnetic Heisenberg ladder. Employing renormalized mean-field theory with simple Gutzwiller factors, we obtain three degenerate superconducting states with different pairing symmetry. Through improving the Gutzwiller factors, we find that the state C with inter-layer modified ${d}_{{y}^{2}-{z}^{2}}$ -wave pairing has the lowest energy in a large doping range. Besides, we use the density matrix renormalization group method to solve the model. The negative binding energy reveals the pairing tendency, and the pair–pair correlation functions exhibit a slowly decaying behavior on certain types of bonds. From the pair correlations, we confirm the inter-layer modified ${d}_{{y}^{2}-{z}^{2}}$ -wave superconducting state as the ground state of the model. |
| first_indexed | 2024-03-12T16:32:48Z |
| format | Article |
| id | doaj.art-c1a3451f6ec64beb89566ceec999f6e7 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:32:48Z |
| publishDate | 2019-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-c1a3451f6ec64beb89566ceec999f6e72023-08-08T15:25:04ZengIOP PublishingNew Journal of Physics1367-26302019-01-01211111304710.1088/1367-2630/ab5603Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladderJie Hou0Ting-Kuo Lee1Yaowu Guo2Jie Lou3Yan Chen4Department of Physics and State Key Laboratory of Surface Physics, Fudan University , Shanghai 200433, People’s Republic of ChinaDepartment of Physics, National Sun Yat-sen University , Kaohsiung 80424, Taiwan; Institute of Physics, Academia Sinica, Nankang Taipei 11529, TaiwanDepartment of Physics and Optoelectronic Engineering, Weifang University , Weifang 261061, People’s Republic of ChinaDepartment of Physics and State Key Laboratory of Surface Physics, Fudan University , Shanghai 200433, People’s Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaDepartment of Physics and State Key Laboratory of Surface Physics, Fudan University , Shanghai 200433, People’s Republic of China; Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaWe construct a four-leg spin-1/2 t – J type model to simulate a doped two-leg spin-1 antiferromagnetic Heisenberg ladder. Employing renormalized mean-field theory with simple Gutzwiller factors, we obtain three degenerate superconducting states with different pairing symmetry. Through improving the Gutzwiller factors, we find that the state C with inter-layer modified ${d}_{{y}^{2}-{z}^{2}}$ -wave pairing has the lowest energy in a large doping range. Besides, we use the density matrix renormalization group method to solve the model. The negative binding energy reveals the pairing tendency, and the pair–pair correlation functions exhibit a slowly decaying behavior on certain types of bonds. From the pair correlations, we confirm the inter-layer modified ${d}_{{y}^{2}-{z}^{2}}$ -wave superconducting state as the ground state of the model.https://doi.org/10.1088/1367-2630/ab5603spin-1 ladderdoped Mott insulatorunconventional superconductivity |
| spellingShingle | Jie Hou Ting-Kuo Lee Yaowu Guo Jie Lou Yan Chen Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder New Journal of Physics spin-1 ladder doped Mott insulator unconventional superconductivity |
| title | Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder |
| title_full | Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder |
| title_fullStr | Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder |
| title_full_unstemmed | Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder |
| title_short | Inter-layer modified -wave superconductivity in an effectively doped spin-1 ladder |
| title_sort | inter layer modified wave superconductivity in an effectively doped spin 1 ladder |
| topic | spin-1 ladder doped Mott insulator unconventional superconductivity |
| url | https://doi.org/10.1088/1367-2630/ab5603 |
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