Finite field regime for a quantum spin liquid in α−RuCl3
An external magnetic field can induce a transition in α−RuCl3 from an ordered zigzag state to a disordered state that is possibly related to the Kitaev quantum spin liquid. Here, we present field-dependent inelastic neutron scattering and magnetocaloric effect measurements implying the existence of...
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| Veröffentlicht in: | Physical review. B 2019-08, Vol.100 (6), p.1 |
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| creator | Balz, Christian Lampen-Kelley, Paula Banerjee, Arnab Yan, Jiaqiang Lu, Zhilun Hu, Xinzhe Yadav, Swapnil M Takano, Yasu Liu, Yaohua Tennant, D Alan Lumsden, Mark D Mandrus, David Nagler, Stephen E |
| description | An external magnetic field can induce a transition in α−RuCl3 from an ordered zigzag state to a disordered state that is possibly related to the Kitaev quantum spin liquid. Here, we present field-dependent inelastic neutron scattering and magnetocaloric effect measurements implying the existence of an additional transition out of the quantum spin-liquid phase at an upper field limit Bu. The neutron scattering shows three distinct regimes of magnetic response. In the low-field ordered state the response shows magnon peaks; the intermediate-field regime shows only continuum scattering, and above Bu the response shows sharp magnon peaks at the lower bound of a strong continuum. Measurable dispersion of magnon modes along the (0,0,L) direction implies non-negligible interplane interactions. Combining the magnetocaloric effect measurements with other data, a T−B phase diagram is constructed. The results constrain the range where one might expect to observe quantum spin-liquid behavior in α−RuCl3. |
| doi_str_mv | 10.1103/PhysRevB.100.060405 |
| format | Article |
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Here, we present field-dependent inelastic neutron scattering and magnetocaloric effect measurements implying the existence of an additional transition out of the quantum spin-liquid phase at an upper field limit Bu. The neutron scattering shows three distinct regimes of magnetic response. In the low-field ordered state the response shows magnon peaks; the intermediate-field regime shows only continuum scattering, and above Bu the response shows sharp magnon peaks at the lower bound of a strong continuum. Measurable dispersion of magnon modes along the (0,0,L) direction implies non-negligible interplane interactions. Combining the magnetocaloric effect measurements with other data, a T−B phase diagram is constructed. The results constrain the range where one might expect to observe quantum spin-liquid behavior in α−RuCl3.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevB.100.060405</doi><oa>free_for_read</oa></addata></record> |
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| subjects | CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Fields (mathematics) Inelastic scattering Liquid phases Lower bounds Magnons Neutron scattering Neutrons Phase diagrams Ruthenium trichloride Spin liquid |
| title | Finite field regime for a quantum spin liquid in α−RuCl3 |
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