Monopole Josephson effects in a Dirac spin liquid
Dirac spin liquids (DSLs) are gapless featureless states, yet interesting by virtue of the effective field theory describing them—(2 + 1)-dimensional quantum electrodynamics (QED_{3}). Further, a DSL is known to be a “parent state” of various seemingly unrelated ordered states, such as antiferromagn...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-03-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.013169 |
| _version_ | 1797210533757190144 |
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| author | Gautam Nambiar Daniel Bulmash Victor Galitski |
| author_facet | Gautam Nambiar Daniel Bulmash Victor Galitski |
| author_sort | Gautam Nambiar |
| collection | DOAJ |
| description | Dirac spin liquids (DSLs) are gapless featureless states, yet interesting by virtue of the effective field theory describing them—(2 + 1)-dimensional quantum electrodynamics (QED_{3}). Further, a DSL is known to be a “parent state” of various seemingly unrelated ordered states, such as antiferromagnets and valence bond solids in the sense that one can obtain ordered states by condensing magnetic monopoles of the emergent gauge field. Can operators in the effective field theory, such as the emergent electric field, be externally induced and measured? In this work, we exploit the parent state picture to argue that the answer is yes. We propose a range of “monopole Josephson effects” that arise when two ordered states are separated by a region of the parent DSL. In particular, we show that one can induce an AC monopole Josephson effect, which manifests itself as an AC emergent electric field in the spin liquid, accompanied by a measurable spin current. Further, we show that this AC emergent electric field can be measured as a sharp tunable peak in Raman scattering. This work provides a theoretical proof of principle that emergent gauge fields in spin liquids can be externally induced, manipulated, and probed using more conventional states, which offers a generic platform for studying the exotic spin phases. |
| first_indexed | 2024-04-24T10:12:07Z |
| format | Article |
| id | doaj.art-bbcbc5db17cd4a8f9159fcaba3e7005a |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:12:07Z |
| publishDate | 2023-03-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-bbcbc5db17cd4a8f9159fcaba3e7005a2024-04-12T17:29:12ZengAmerican Physical SocietyPhysical Review Research2643-15642023-03-015101316910.1103/PhysRevResearch.5.013169Monopole Josephson effects in a Dirac spin liquidGautam NambiarDaniel BulmashVictor GalitskiDirac spin liquids (DSLs) are gapless featureless states, yet interesting by virtue of the effective field theory describing them—(2 + 1)-dimensional quantum electrodynamics (QED_{3}). Further, a DSL is known to be a “parent state” of various seemingly unrelated ordered states, such as antiferromagnets and valence bond solids in the sense that one can obtain ordered states by condensing magnetic monopoles of the emergent gauge field. Can operators in the effective field theory, such as the emergent electric field, be externally induced and measured? In this work, we exploit the parent state picture to argue that the answer is yes. We propose a range of “monopole Josephson effects” that arise when two ordered states are separated by a region of the parent DSL. In particular, we show that one can induce an AC monopole Josephson effect, which manifests itself as an AC emergent electric field in the spin liquid, accompanied by a measurable spin current. Further, we show that this AC emergent electric field can be measured as a sharp tunable peak in Raman scattering. This work provides a theoretical proof of principle that emergent gauge fields in spin liquids can be externally induced, manipulated, and probed using more conventional states, which offers a generic platform for studying the exotic spin phases.http://doi.org/10.1103/PhysRevResearch.5.013169 |
| spellingShingle | Gautam Nambiar Daniel Bulmash Victor Galitski Monopole Josephson effects in a Dirac spin liquid Physical Review Research |
| title | Monopole Josephson effects in a Dirac spin liquid |
| title_full | Monopole Josephson effects in a Dirac spin liquid |
| title_fullStr | Monopole Josephson effects in a Dirac spin liquid |
| title_full_unstemmed | Monopole Josephson effects in a Dirac spin liquid |
| title_short | Monopole Josephson effects in a Dirac spin liquid |
| title_sort | monopole josephson effects in a dirac spin liquid |
| url | http://doi.org/10.1103/PhysRevResearch.5.013169 |
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