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Gapless Spin Excitations in the Field-Induced Quantum Spin Liquid Phase of α-RuCl_{3}.
Zheng, Jiacheng; Ran, Kejing; Li, Tianrun; Wang, Jinghui; Wang, Pengshuai; Liu, Bin; Liu, Zheng-Xin; Normand, B; Wen, Jinsheng; Yu, Weiqiang.
Affiliation
  • Zheng J; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.
  • Ran K; Department of Physics, Beijing Jiaotong University, Beijing 100044, China.
  • Li T; National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
  • Wang J; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.
  • Wang P; National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
  • Liu B; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.
  • Liu ZX; Department of Physics, Beijing Jiaotong University, Beijing 100044, China.
  • Normand B; Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.
  • Wen J; Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, CH-5232 Villigen-PSI, Switzerland.
  • Yu W; National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.
Phys Rev Lett ; 119(22): 227208, 2017 Dec 01.
Article in En | MEDLINE | ID: mdl-29286810
α-RuCl_{3} is a leading candidate material for the observation of physics related to the Kitaev quantum spin liquid (QSL). By combined susceptibility, specific-heat, and nuclear-magnetic-resonance measurements, we demonstrate that α-RuCl_{3} undergoes a quantum phase transition to a QSL in a magnetic field of 7.5 T applied in the ab plane. We show further that this high-field QSL phase has gapless spin excitations over a field range up to 16 T. This highly unconventional result, unknown in either Heisenberg or Kitaev magnets, offers insight essential to establishing the physics of α-RuCl_{3}.
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Full text: 1 Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2017 Type: Article Affiliation country: China
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Full text: 1 Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2017 Type: Article Affiliation country: China