Magnetic Stress-Driven Metal-Insulator Transition in Strongly Correlated Antiferromagnetic CrN
Traditionally, the Coulomb repulsion or Peierls instability causes the metal-insulator phase transitions in strongly correlated quantum materials. In comparison, magnetic stress is predicted to drive the metal-insulator transition in materials exhibiting strong spin-lattice coupling. However, this mechanism lacks experimental validation and an in-depth understanding. Here we demonstrate the existence of the magnetic stress-driven metal-insulator transition in an archetypal material, chromium nitride. Structural, magnetic, electronic transport characterization, and first-principles modeling analysis show that the phase transition temperature in CrN is directly proportional to the strain-controlled anisotropic magnetic stress. The compressive strain increases the magnetic stress, leading to the much-coveted room-temperature transition. In contrast, tensile strain and the inclusion of nonmagnetic cations weaken the magnetic stress and reduce the transition temperature. This discovery of a new physical origin of metal-insulator phase transition that unifies spin, charge, and lattice degrees of freedom in correlated materials marks a new paradigm and could lead to novel device functionalities.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:131 |
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| Enthalten in: |
Physical review letters - 131(2023), 12 vom: 22. Sept., Seite 126302 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Biswas, Bidesh [VerfasserIn] |
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Date Revised 30.10.2023 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1103/PhysRevLett.131.126302 |
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NLM362965706 |
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| 520 | |a Traditionally, the Coulomb repulsion or Peierls instability causes the metal-insulator phase transitions in strongly correlated quantum materials. In comparison, magnetic stress is predicted to drive the metal-insulator transition in materials exhibiting strong spin-lattice coupling. However, this mechanism lacks experimental validation and an in-depth understanding. Here we demonstrate the existence of the magnetic stress-driven metal-insulator transition in an archetypal material, chromium nitride. Structural, magnetic, electronic transport characterization, and first-principles modeling analysis show that the phase transition temperature in CrN is directly proportional to the strain-controlled anisotropic magnetic stress. The compressive strain increases the magnetic stress, leading to the much-coveted room-temperature transition. In contrast, tensile strain and the inclusion of nonmagnetic cations weaken the magnetic stress and reduce the transition temperature. This discovery of a new physical origin of metal-insulator phase transition that unifies spin, charge, and lattice degrees of freedom in correlated materials marks a new paradigm and could lead to novel device functionalities | ||
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| 700 | 1 | |a Pandey, Nidhi |e verfasserin |4 aut | |
| 700 | 1 | |a Acharya, Shashidhara |e verfasserin |4 aut | |
| 700 | 1 | |a Joseph, Anjana |e verfasserin |4 aut | |
| 700 | 1 | |a Pillai, Ashalatha Indiradevi Kamalasanan |e verfasserin |4 aut | |
| 700 | 1 | |a Bansal, Manisha |e verfasserin |4 aut | |
| 700 | 1 | |a de H-Óra, Muireann |e verfasserin |4 aut | |
| 700 | 1 | |a Panda, Debendra Prasad |e verfasserin |4 aut | |
| 700 | 1 | |a Dey, Arka Bikash |e verfasserin |4 aut | |
| 700 | 1 | |a Bertram, Florian |e verfasserin |4 aut | |
| 700 | 1 | |a Narayana, Chandrabhas |e verfasserin |4 aut | |
| 700 | 1 | |a MacManus-Driscoll, Judith |e verfasserin |4 aut | |
| 700 | 1 | |a Maity, Tuhin |e verfasserin |4 aut | |
| 700 | 1 | |a Garbrecht, Magnus |e verfasserin |4 aut | |
| 700 | 1 | |a Saha, Bivas |e verfasserin |4 aut | |
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