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Universal theory of strange metals from spatially random interactions.

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Title: Universal theory of strange metals from spatially random interactions.
Authors: Patel, Aavishkar A., Haoyu Guo, Esterlis, Ilya, Sachdev, Subir
Source: Science (pre-March 2025). 8/18/2023, Vol. 381 Issue 6659, p790-793. 4p. 1 Diagram.
Subjects: Specific heat, Electronic excitation, Metals, Low temperatures, Fermions, Quasiparticles
Abstract: Strange metals—ubiquitous in correlated quantum materials—transport electrical charge at low temperatures but not by the individual electronic quasiparticle excitations, which carry charge in ordinary metals. In this work, we consider two-dimensional metals of fermions coupled to quantum critical scalars, the latter representing order parameters or fractionalized particles. We show that at low temperatures (T), such metals generically exhibit strange metal behavior with a T-linear resistivity arising from spatially random fluctuations in the fermion-scalar Yukawa couplings about a nonzero spatial average. We also find a T ln(1/T) specific heat and a rationale for the Planckian bound on the transport scattering time. These results are in agreement with observations and are obtained in the large N expansion of an ensemble of critical metals with N fermion flavors. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Universal theory of strange metals from spatially random interactions.
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  Data: <searchLink fieldCode="AR" term="%22Patel%2C+Aavishkar+A%2E%22">Patel, Aavishkar A.</searchLink><br /><searchLink fieldCode="AR" term="%22Haoyu+Guo%22">Haoyu Guo</searchLink><br /><searchLink fieldCode="AR" term="%22Esterlis%2C+Ilya%22">Esterlis, Ilya</searchLink><br /><searchLink fieldCode="AR" term="%22Sachdev%2C+Subir%22">Sachdev, Subir</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 8/18/2023, Vol. 381 Issue 6659, p790-793. 4p. 1 Diagram.
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  Data: <searchLink fieldCode="DE" term="%22Specific+heat%22">Specific heat</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+excitation%22">Electronic excitation</searchLink><br /><searchLink fieldCode="DE" term="%22Metals%22">Metals</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Fermions%22">Fermions</searchLink><br /><searchLink fieldCode="DE" term="%22Quasiparticles%22">Quasiparticles</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Strange metals—ubiquitous in correlated quantum materials—transport electrical charge at low temperatures but not by the individual electronic quasiparticle excitations, which carry charge in ordinary metals. In this work, we consider two-dimensional metals of fermions coupled to quantum critical scalars, the latter representing order parameters or fractionalized particles. We show that at low temperatures (T), such metals generically exhibit strange metal behavior with a T-linear resistivity arising from spatially random fluctuations in the fermion-scalar Yukawa couplings about a nonzero spatial average. We also find a T ln(1/T) specific heat and a rationale for the Planckian bound on the transport scattering time. These results are in agreement with observations and are obtained in the large N expansion of an ensemble of critical metals with N fermion flavors. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1126/science.abq6011
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        Text: English
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        Type: general
      – SubjectFull: Electronic excitation
        Type: general
      – SubjectFull: Metals
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      – SubjectFull: Low temperatures
        Type: general
      – SubjectFull: Fermions
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      – SubjectFull: Quasiparticles
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              M: 08
              Text: 8/18/2023
              Type: published
              Y: 2023
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