Overscreened Kondo fixed point in S = 1 spin liquid
We propose a possible realization of the overscreened Kondo impurity problem by a magnetic s = 1/2 impurity embedded in a two-dimensional S = 1 U(1) spin liquid with a Fermi surface. This problem contains an interesting interplay between non-Fermi-liquid behavior induced by a U(1) gauge field couple...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/88747 https://orcid.org/0000-0003-4203-4148 https://orcid.org/0000-0001-7809-8157 |
| _version_ | 1811088088505516032 |
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| author | Serbyn, Maksym Lee, Patrick A. Todadri, Senthil |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Serbyn, Maksym Lee, Patrick A. Todadri, Senthil |
| author_sort | Serbyn, Maksym |
| collection | MIT |
| description | We propose a possible realization of the overscreened Kondo impurity problem by a magnetic s = 1/2 impurity embedded in a two-dimensional S = 1 U(1) spin liquid with a Fermi surface. This problem contains an interesting interplay between non-Fermi-liquid behavior induced by a U(1) gauge field coupled to fermions and a non-Fermi-liquid fixed point in the overscreened Kondo problem. Using a large-N expansion together with an expansion in the dynamical exponent of the gauge field, we find that the coupling to the gauge field leads to weak but observable changes in the physical properties of the system at the overscreened Kondo fixed point. We discuss the extrapolation of this result to a physical case and argue that the realization of overscreened Kondo physics could lead to observations of effects due to gauge fields. |
| first_indexed | 2024-09-23T13:56:04Z |
| format | Article |
| id | mit-1721.1/88747 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:56:04Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/887472022-09-28T17:10:17Z Overscreened Kondo fixed point in S = 1 spin liquid Serbyn, Maksym Lee, Patrick A. Todadri, Senthil Massachusetts Institute of Technology. Department of Physics Serbyn, Maksym Todadri, Senthil Lee, Patrick A. We propose a possible realization of the overscreened Kondo impurity problem by a magnetic s = 1/2 impurity embedded in a two-dimensional S = 1 U(1) spin liquid with a Fermi surface. This problem contains an interesting interplay between non-Fermi-liquid behavior induced by a U(1) gauge field coupled to fermions and a non-Fermi-liquid fixed point in the overscreened Kondo problem. Using a large-N expansion together with an expansion in the dynamical exponent of the gauge field, we find that the coupling to the gauge field leads to weak but observable changes in the physical properties of the system at the overscreened Kondo fixed point. We discuss the extrapolation of this result to a physical case and argue that the realization of overscreened Kondo physics could lead to observations of effects due to gauge fields. National Science Foundation (U.S.) (DMR 1005434) National Science Foundation (U.S.) (DMR 1104498) 2014-08-18T14:32:26Z 2014-08-18T14:32:26Z 2013-07 2013-03 Article http://purl.org/eprint/type/JournalArticle 1098-0121 1550-235X http://hdl.handle.net/1721.1/88747 Serbyn, Maksym, T. Senthil, and Patrick A. Lee. “Overscreened Kondo Fixed Point in S = 1 Spin Liquid.” Phys. Rev. B 88, no. 2 (July 2013). © 2013 American Physical Society https://orcid.org/0000-0003-4203-4148 https://orcid.org/0000-0001-7809-8157 en_US http://dx.doi.org/10.1103/PhysRevB.88.024419 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society |
| spellingShingle | Serbyn, Maksym Lee, Patrick A. Todadri, Senthil Overscreened Kondo fixed point in S = 1 spin liquid |
| title | Overscreened Kondo fixed point in S = 1 spin liquid |
| title_full | Overscreened Kondo fixed point in S = 1 spin liquid |
| title_fullStr | Overscreened Kondo fixed point in S = 1 spin liquid |
| title_full_unstemmed | Overscreened Kondo fixed point in S = 1 spin liquid |
| title_short | Overscreened Kondo fixed point in S = 1 spin liquid |
| title_sort | overscreened kondo fixed point in s 1 spin liquid |
| url | http://hdl.handle.net/1721.1/88747 https://orcid.org/0000-0003-4203-4148 https://orcid.org/0000-0001-7809-8157 |
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