Finite-temperature screening of U(1) fractons
We investigate the finite-temperature screening behavior of three-dimensional U(1) spin-liquid phases with fracton excitations. Several features are shared with the conventional U(1) spin liquid. The system can exhibit spin-liquid physics over macroscopic length scales at low temperatures, but scree...
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| Format: | Article |
| Language: | English |
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American Physical Society
2018
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| Online Access: | http://hdl.handle.net/1721.1/113863 https://orcid.org/0000-0001-5013-0186 |
| Summary: | We investigate the finite-temperature screening behavior of three-dimensional U(1) spin-liquid phases with fracton excitations. Several features are shared with the conventional U(1) spin liquid. The system can exhibit spin-liquid physics over macroscopic length scales at low temperatures, but screening effects eventually lead to a smooth finite-temperature crossover to a trivial phase at sufficiently large distances. However, unlike more conventional U(1) spin liquids, we find that complete low-temperature screening of fractons requires not only very large distances, but also very long time scales. At the longest time scales, a charged disturbance (fracton) will acquire a screening cloud of other fractons, resulting in only short-range correlations in the system. At intermediate time scales, on the other hand, a fracton can only be partially screened by a cloud of mobile excitations, leaving weak power-law correlations in the system. Such residual power-law correlations may be a useful diagnostic in an experimental search for U(1) fracton phases. |
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