| KREMPASKÝ, Juraj, Laurent NICOLAÏ, Martin GMITRA, Houke CHEN, Mauro FANCIULLI, Eduardo B. GUEDES, Marco CAPUTO, Milan RADOVIĆ, Valentine V. VOLOBUEV, Ondřej CAHA, Gunther SPRINGHOLZ, Jan MINÁR and J. Hugo DIL. Triple-Point Fermions in Ferroelectric GeTe. Physical Review Letters. American Physical Society, 2021, vol. 126, No 20, p. "206403", 6 pp. ISSN 0031-9007. Available from: https://dx.doi.org/10.1103/PhysRevLett.126.206403. |
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@article{1776722,
author = {Krempaský, Juraj and Nicolaï, Laurent and Gmitra, Martin and Chen, Houke and Fanciulli, Mauro and Guedes, Eduardo B. and Caputo, Marco and Radović, Milan and Volobuev, Valentine V. and Caha, Ondřej and Springholz, Gunther and Minár, Jan and Dil, J. Hugo},
article_number = {20},
doi = {http://dx.doi.org/10.1103/PhysRevLett.126.206403},
keywords = {Electronic structure; Ferroelectricity; Topological phases of matter; Topological materials; Angle-resolved photoemission spectroscopy; Density functional calculations},
language = {eng},
issn = {0031-9007},
journal = {Physical Review Letters},
title = {Triple-Point Fermions in Ferroelectric GeTe},
url = {https://doi.org/10.1103/PhysRevLett.126.206403},
volume = {126},
year = {2021}
}
TY - JOUR
ID - 1776722
AU - Krempaský, Juraj - Nicolaï, Laurent - Gmitra, Martin - Chen, Houke - Fanciulli, Mauro - Guedes, Eduardo B. - Caputo, Marco - Radović, Milan - Volobuev, Valentine V. - Caha, Ondřej - Springholz, Gunther - Minár, Jan - Dil, J. Hugo
PY - 2021
TI - Triple-Point Fermions in Ferroelectric GeTe
JF - Physical Review Letters
VL - 126
IS - 20
SP - "206403"
EP - "206403"
PB - American Physical Society
SN - 00319007
KW - Electronic structure
KW - Ferroelectricity
KW - Topological phases of matter
KW - Topological materials
KW - Angle-resolved photoemission spectroscopy
KW - Density functional calculations
UR - https://doi.org/10.1103/PhysRevLett.126.206403
N2 - Ferroelectric alpha-GeTe is unveiled to exhibit an intriguing multiple nontrivial topology of the electronic band structure due to the existence of triple-point and type-II Weyl fermions, which goes well beyond the giant Rashba spin splitting controlled by external fields as previously reported. Using spin- and angle-resolved photoemission spectroscopy combined with ab initio density functional theory, the unique spin texture around the triple point caused by the crossing of one spin-degenerate and two spin-split bands along the ferroelectric crystal axis is derived. This consistently reveals spin winding numbers that are coupled with time-reversal symmetry and Lorentz invariance, which are found to be equal for both triple-point pairs in the Brillouin zone. The rich manifold of effects opens up promising perspectives for studying nontrivial phenomena and multicomponent fermions in condensed matter systems.
ER -
KREMPASKÝ, Juraj, Laurent NICOLAÏ, Martin GMITRA, Houke CHEN, Mauro FANCIULLI, Eduardo B. GUEDES, Marco CAPUTO, Milan RADOVI$\backslash$'C, Valentine V. VOLOBUEV, Ondřej CAHA, Gunther SPRINGHOLZ, Jan MINÁR and J. Hugo DIL. Triple-Point Fermions in Ferroelectric GeTe. \textit{Physical Review Letters}. American Physical Society, 2021, vol.~126, No~20, p.~''206403'', 6 pp. ISSN~0031-9007. Available from: https://dx.doi.org/10.1103/PhysRevLett.126.206403.
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