Anomalous Magnetothermopower in a Metallic Frustrated Antiferromagnet
We report the temperature \(T\) and magnetic field \(H\) dependence of the thermopower \(S\) of an itinerant triangular antiferromagnet PdCrO\(_2\) in high magnetic fields up to 32 T. In the paramagnetic phase, the zero-field thermopower is positive with a value typical of good metals with a high ca...
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| creator | Arsenijević, Stevan Jong Mok Ok Robinson, Peter Ghannadzadeh, Saman Katsnelson, Mikhail I Jun Sung Kim Hussey, Nigel E |
| description | We report the temperature \(T\) and magnetic field \(H\) dependence of the thermopower \(S\) of an itinerant triangular antiferromagnet PdCrO\(_2\) in high magnetic fields up to 32 T. In the paramagnetic phase, the zero-field thermopower is positive with a value typical of good metals with a high carrier density. In marked contrast to typical metals, however, \(S\) decreases rapidly with increasing magnetic field, approaching zero at the maximum field scale for \(T >\) 70 K. We argue here that this profound change in the thermoelectric response derives from the strong interaction of the 4\(d\) correlated electrons of the Pd ions with the short-range spin correlations of the Cr\(^{3+}\) spins that persist beyond the N\'{e}el ordering temperature due to the combined effects of geometrical frustration and low dimensionality. |
| doi_str_mv | 10.48550/arxiv.1511.00356 |
| format | Article |
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In the paramagnetic phase, the zero-field thermopower is positive with a value typical of good metals with a high carrier density. In marked contrast to typical metals, however, \(S\) decreases rapidly with increasing magnetic field, approaching zero at the maximum field scale for \(T >\) 70 K. We argue here that this profound change in the thermoelectric response derives from the strong interaction of the 4\(d\) correlated electrons of the Pd ions with the short-range spin correlations of the Cr\(^{3+}\) spins that persist beyond the N\'{e}el ordering temperature due to the combined effects of geometrical frustration and low dimensionality.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1511.00356</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Antiferromagnetism ; Carrier density ; Dependence ; Electrons ; Magnetic fields ; Physics - Strongly Correlated Electrons ; Strong interactions (field theory) ; Thermoelectricity</subject><ispartof>arXiv.org, 2016-02</ispartof><rights>2016. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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In the paramagnetic phase, the zero-field thermopower is positive with a value typical of good metals with a high carrier density. In marked contrast to typical metals, however, \(S\) decreases rapidly with increasing magnetic field, approaching zero at the maximum field scale for \(T >\) 70 K. 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In the paramagnetic phase, the zero-field thermopower is positive with a value typical of good metals with a high carrier density. In marked contrast to typical metals, however, \(S\) decreases rapidly with increasing magnetic field, approaching zero at the maximum field scale for \(T >\) 70 K. We argue here that this profound change in the thermoelectric response derives from the strong interaction of the 4\(d\) correlated electrons of the Pd ions with the short-range spin correlations of the Cr\(^{3+}\) spins that persist beyond the N\'{e}el ordering temperature due to the combined effects of geometrical frustration and low dimensionality.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1511.00356</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Antiferromagnetism Carrier density Dependence Electrons Magnetic fields Physics - Strongly Correlated Electrons Strong interactions (field theory) Thermoelectricity |
| title | Anomalous Magnetothermopower in a Metallic Frustrated Antiferromagnet |
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