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Two-dimensional typ...
Two-dimensional type-II Dirac fermions in layered oxides
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- Horio, M. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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- Matt, C. E. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.;Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.;Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
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- Kramer, K. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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- Sutter, D. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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- Cook, A. M. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.,KTH Royal Inst Technol, Dept Appl Phys, Electrum 229, SE-16440 Stockholm, Sweden
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- Sassa, Yasmine (author)
- Uppsala universitet,Molekyl- och kondenserade materiens fysik
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- Hauser, K. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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- Månsson, Martin, As. Prof. 1976- (author)
- KTH,Tillämpad fysik,Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland,Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England
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- Plumb, N. C. (author)
- Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
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- Shi, M. (author)
- Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
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- Lipscombe, O. J. (author)
- Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
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- Hayden, S. M. (author)
- Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England.
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- Neupert, T. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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- Chang, J. (author)
- Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.
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Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland.;Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.;Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. (creator_code:org_t)
- 2018-08-14
- 2018
- English.
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In: Nature Communications. - : NATURE PUBLISHING GROUP. - 2041-1723. ; 9
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Abstract
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- Relativistic massless Dirac fermions can be probed with high-energy physics experiments, but appear also as low-energy quasi-particle excitations in electronic band structures. In condensed matter systems, their massless nature can be protected by crystal symmetries. Classification of such symmetry-protected relativistic band degeneracies has been fruitful, although many of the predicted quasi-particles still await their experimental discovery. Here we reveal, using angle-resolved photoemission spectroscopy, the existence of two-dimensional type-II Dirac fermions in the high-temperature superconductor La1.77Sr0.23CuO4. The Dirac point, constituting the crossing of d(x2-y2) and d(z2) bands, is found approximately one electronvolt below the Fermi level (E-F) and is protected by mirror symmetry. If spin-orbit coupling is considered, the Dirac point degeneracy is lifted and the bands acquire a topologically non-trivial character. In certain nickelate systems, band structure calculations suggest that the same type-II Dirac fermions can be realised near EF.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Horio, M.
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Matt, C. E.
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Kramer, K.
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Sutter, D.
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Cook, A. M.
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Sassa, Yasmine
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Hauser, K.
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Månsson, Martin, ...
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Plumb, N. C.
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Shi, M.
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Lipscombe, O. J.
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Hayden, S. M.
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Neupert, T.
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Chang, J.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Nature Communica ...
- By the university
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Royal Institute of Technology
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Uppsala University