Mottness induced superfluid phase fluctuation with increased density
Recent observation of diminishing superfluid phase stiffness upon increasing carrier density in cuprate high-temperature superconductors is unexpected from the quantum density-phase conjugation of superfluidity. Here, through analytic estimation and verified via variational Monte Carlo calculation o...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac8ec9 |
| _version_ | 1797748368473063424 |
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| author | Zi-Jian Lang Fan Yang Wei Ku |
| author_facet | Zi-Jian Lang Fan Yang Wei Ku |
| author_sort | Zi-Jian Lang |
| collection | DOAJ |
| description | Recent observation of diminishing superfluid phase stiffness upon increasing carrier density in cuprate high-temperature superconductors is unexpected from the quantum density-phase conjugation of superfluidity. Here, through analytic estimation and verified via variational Monte Carlo calculation of an emergent Bose liquid, we point out that Mottness of the underlying carriers can cause a stronger phase fluctuation of the superfluid with increasing carrier density. This effect turns the expected density-increased phase stiffness into a dome shape, in good agreement with the recent observation. Specifically, the effective mass divergence due to ‘jamming’ of the low-energy bosons reproduces the observed nonlinear relation between phase stiffness and transition temperature. Our results suggest a new paradigm, in which unconventional superconductivity in some strongly correlated materials is described by physics of bosonic superfluidity, as opposed to pairing-strength limited Cooper pairing. |
| first_indexed | 2024-03-12T16:03:45Z |
| format | Article |
| id | doaj.art-8c3cad1f10a7476b8712b85363315535 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:03:45Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-8c3cad1f10a7476b8712b853633155352023-08-09T14:27:11ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124909302610.1088/1367-2630/ac8ec9Mottness induced superfluid phase fluctuation with increased densityZi-Jian Lang0https://orcid.org/0000-0001-7297-884XFan Yang1Wei Ku2Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of ChinaSchool of Physics, Beijing Institute of Technology , Beijing 100081, People’s Republic of ChinaTsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of China; Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) , Shanghai 200240, People’s Republic of China; Shanghai Branch, Hefei National Laboratory , Shanghai 201315, People’s Republic of ChinaRecent observation of diminishing superfluid phase stiffness upon increasing carrier density in cuprate high-temperature superconductors is unexpected from the quantum density-phase conjugation of superfluidity. Here, through analytic estimation and verified via variational Monte Carlo calculation of an emergent Bose liquid, we point out that Mottness of the underlying carriers can cause a stronger phase fluctuation of the superfluid with increasing carrier density. This effect turns the expected density-increased phase stiffness into a dome shape, in good agreement with the recent observation. Specifically, the effective mass divergence due to ‘jamming’ of the low-energy bosons reproduces the observed nonlinear relation between phase stiffness and transition temperature. Our results suggest a new paradigm, in which unconventional superconductivity in some strongly correlated materials is described by physics of bosonic superfluidity, as opposed to pairing-strength limited Cooper pairing.https://doi.org/10.1088/1367-2630/ac8ec9superfluid phase stiffnessphase fluctuationGutzwiller approximation |
| spellingShingle | Zi-Jian Lang Fan Yang Wei Ku Mottness induced superfluid phase fluctuation with increased density New Journal of Physics superfluid phase stiffness phase fluctuation Gutzwiller approximation |
| title | Mottness induced superfluid phase fluctuation with increased density |
| title_full | Mottness induced superfluid phase fluctuation with increased density |
| title_fullStr | Mottness induced superfluid phase fluctuation with increased density |
| title_full_unstemmed | Mottness induced superfluid phase fluctuation with increased density |
| title_short | Mottness induced superfluid phase fluctuation with increased density |
| title_sort | mottness induced superfluid phase fluctuation with increased density |
| topic | superfluid phase stiffness phase fluctuation Gutzwiller approximation |
| url | https://doi.org/10.1088/1367-2630/ac8ec9 |
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