Electronic Structure Dimensionality of the Quantum-Critical Ferromagnet YbNi4 P2

YbNi4P2 is the first known ferromagnetic metal showing a second-order quantum phase transition. Current theoretical understanding rules out second-order ferromagnetic quantum criticality in centrosymmetric two- and three-dimensional (2D and 3D) metals. Thus, studying the electronic structure of YbNi...

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Detalles Bibliográficos
Autores: Dai, Ji|||0000-0003-1388-6843, Antezak, Alexandre, Broad, W., Thees, Maximilian|||0000-0002-6527-0373, Zatko, V., Bouwmeester, Rosa Luca|||0000-0003-1114-5152, Fortuna, F., Le Fèvre, Patrick|||0000-0001-9800-8059, Rault, J.E., Horiba, K., Vyalikh, Denis|||0000-0001-9053-7511, Kumigashira, Hiroshi|||0000-0003-4668-2695, Kliemt, Kristin|||0000-0001-7415-4158, Friedemann, Sven|||0000-0002-0606-4991, Krellner, Cornelius|||0000-0002-0671-7729, Frantzeskakis, Emmanouil|||0000-0002-6014-5637, Santander-Syro, A.F.|||0000-0003-3966-2485
Tipo de recurso: artículo
Fecha de publicación:2025
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:312476
Acceso en línea:https://ddd.uab.cat/record/312476
https://dx.doi.org/urn:doi:10.1103/PhysRevLett.134.126401
Access Level:acceso abierto
Palabra clave:Centrosymmetric
Electronic.structure
Ferromagnetics
Ferromagnets
Quantum critical
Quantum criticality
Quantum-phase transition
Second orders
Two-dimensional
Descripción
Sumario:YbNi4P2 is the first known ferromagnetic metal showing a second-order quantum phase transition. Current theoretical understanding rules out second-order ferromagnetic quantum criticality in centrosymmetric two- and three-dimensional (2D and 3D) metals. Thus, studying the electronic structure of YbNi4P2 is of prime fundamental importance. Using angle-resolved photoemission spectroscopy, we experimentally prove the existence of 1D Fermi surface contours. In addition, our results demonstrate that part of the electronic structure of YbNi4P2 is made of states of higher dimensionality, thereby bringing into question the fact that ferromagnetic quantum criticality in centrosymmetric crystals is exclusively found in 1D systems. Our experimental data show that the electronic structure of YbNi4P2 is a playground of mixed dimensionality, electron correlations, strong hybridization, and spin-orbit coupling, all of them providing new insights in understanding the origin of ferromagnetic quantum criticality.

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