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Xu J, Wu F, Bao JK, Han F, Xiao ZL, Martin I, Lyu YY, Wang YL, Chung DY, Li M, Zhang W, Pearson JE, Jiang JS, Kanatzidis MG, Kwok WK. Orbital-flop Induced Magnetoresistance Anisotropy in Rare Earth Monopnictide CeSb. Nat Commun 2019; 10:2875. [PMID: 31253766 PMCID: PMC6599061 DOI: 10.1038/s41467-019-10624-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 05/22/2019] [Indexed: 11/22/2022] Open
Abstract
The charge and spin of the electrons in solids have been extensively exploited in electronic devices and in the development of spintronics. Another attribute of electrons—their orbital nature—is attracting growing interest for understanding exotic phenomena and in creating the next-generation of quantum devices such as orbital qubits. Here, we report on orbital-flop induced magnetoresistance anisotropy in CeSb. In the low temperature high magnetic-field driven ferromagnetic state, a series of additional minima appear in the angle-dependent magnetoresistance. These minima arise from the anisotropic magnetization originating from orbital-flops and from the enhanced electron scattering from magnetic multidomains formed around the first-order orbital-flop transition. The measured magnetization anisotropy can be accounted for with a phenomenological model involving orbital-flops and a spin-valve-like structure is used to demonstrate the viable utilization of orbital-flop phenomenon. Our results showcase a contribution of orbital behavior in the emergence of intriguing phenomena. The orbital degree of freedom can be as important as the charge and spin of the electron to the electronic phenomena. Here the authors show additional minimum in the angle-dependent magnetoresistance (MR) for the low temperature high magnetic field driven ferromagnetic state in CeSb which indicates the orbital flop induced MR anisotropy.
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Affiliation(s)
- Jing Xu
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA.,Department of Physics, Northern Illinois University, DeKalb, IL, 60115, USA
| | - Fengcheng Wu
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA.,Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, MD, 20742, USA
| | - Jin-Ke Bao
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Fei Han
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Zhi-Li Xiao
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA. .,Department of Physics, Northern Illinois University, DeKalb, IL, 60115, USA.
| | - Ivar Martin
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA.
| | - Yang-Yang Lyu
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA.,Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China
| | - Yong-Lei Wang
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA.,Research Institute of Superconductor Electronics, School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China
| | - Duck Young Chung
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Mingda Li
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Wei Zhang
- Department of Physics, Oakland University, Rochester, MI, 48309, USA.
| | - John E Pearson
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Jidong S Jiang
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Mercouri G Kanatzidis
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA.,Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Wai-Kwong Kwok
- Materials Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
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Smedarchina Z, Siebrand W, Fernández-Ramos A. Entanglement and co-tunneling of two equivalent protons in hydrogen bond pairs. J Chem Phys 2018; 148:102307. [DOI: 10.1063/1.5000681] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Zorka Smedarchina
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), e Departamento de Química Física, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- National Research Council of Canada, Ottawa, Ontario K1A 0R6 Canada
| | - Willem Siebrand
- National Research Council of Canada, Ottawa, Ontario K1A 0R6 Canada
| | - Antonio Fernández-Ramos
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), e Departamento de Química Física, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Brange F, Malkoc O, Samuelsson P. Minimal Entanglement Witness from Electrical Current Correlations. PHYSICAL REVIEW LETTERS 2017; 118:036804. [PMID: 28157375 DOI: 10.1103/physrevlett.118.036804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Indexed: 06/06/2023]
Abstract
Despite great efforts, an unambiguous demonstration of entanglement of mobile electrons in solid state conductors is still lacking. Investigating theoretically a generic entangler-detector setup, we here show that a witness of entanglement between two flying electron qubits can be constructed from only two current cross correlation measurements, for any nonzero detector efficiencies and noncollinear polarization vectors. We find that all entangled pure states, but not all mixed ones, can be detected with only two measurements, except the maximally entangled states, which require three. Moreover, detector settings for optimal entanglement witnessing are presented.
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Affiliation(s)
- F Brange
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - O Malkoc
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
| | - P Samuelsson
- Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
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