Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M43: Dirac and Weyl Semimetal: Material Discovery and Development
8:00 AM–10:48 AM,
Wednesday, March 8, 2023
Room: Room 317
Sponsoring
Unit:
DMP
Chair: Akshay Murthy, Fermi National Accelerator Laboratory
Abstract: M43.00006 : Tailoring Dirac states in a correlated system by chemical substitution*
9:24 AM–9:36 AM
Presenter:
Niloufar Nilforoushan
(a) Laboratoire de Physique des Solides, Université Paris-Saclay, Orsay, France. b) Laboratoire de Physique de l'Ecole Normale Supérieure, Université de Paris, France.)
Authors:
Niloufar Nilforoushan
(a) Laboratoire de Physique des Solides, Université Paris-Saclay, Orsay, France. b) Laboratoire de Physique de l'Ecole Normale Supérieure, Université de Paris, France.)
Michele Casula
(Institut de Minéralogie de Physique des Matériaux et de Cosmochimie, Sorbonne Université, Museum National d'Histoire Naturelle, Paris, France)
Adriano Amaricci
(CNR Istituto Officina dei Materiali, Trieste, Italy)
Marco Caputo
(Elettra Sincrotrone Trieste, Area Science Park, Trieste, Italy)
Evangelos Papalazarou
(Laboratoire de Physique des Solides, Université Paris-Saclay, France)
Luca Perfetti
(Laboratoire de Physique des Solides, Université Paris-Saclay, France)
Ivana Vobornik
(Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, Trieste, Italy)
Pranab Das Kumar
(Advanced Research Initiative for Correlated-Electron Systems (ARiCES), Department of Physics, National University of Singapore)
Jun Fujii
(Istituto Officina dei Materiali, Consiglio Nazionale delle Ricerche, Trieste, Italy)
David Santos-Cottin
(Institut de Minéralogie de Physique des Matériaux et de Cosmochimie, Sorbonne Université, Museum National d'Histoire Naturelle, Paris, France)
Yannick Klein
(Institut de Minéralogie de Physique des Matériaux et de Cosmochimie, Sorbonne Université, Museum National d'Histoire Naturelle, Paris, France)
Michele Fabrizio
(International School for Advanced Studies (SISSA), Trieste, Italy)
Andrea Gauzzi
(Institut de Minéralogie de Physique des Matériaux et de Cosmochimie, Sorbonne Université, Museum National d'Histoire Naturelle, Paris, France)
Marino Marsi
(Laboratoire de Physique des Solides, Université Paris-Saclay, Orsay, France)
By means of Angle-Resolved Photo-Emission Spectroscopy (ARPES) experiments and ab initio DFT calculations, we prove that it is possible to move and reshape massive Dirac nodal lines in reciprocal space in the correlated system BaCo1−xNixS2 by Co/Ni substitution [2]. We show that the underlying band-inversion mechanism is driven by a large d−p hybridization and electronic correlation combined with the nonsymmorphic symmetry of the crystal. Remarkably, the doping x via chemical substitution also controls the electronic phase diagram which features correlated d-electron Dirac states across its metallic phase.
Our results suggest that BaCo1−xNixS2 is a model system to effectively tailor correlated Dirac states. More generally, we show that the two standard features of correlated systems -that is, the hybrid d−p bands and the charge-transfer gap, constitute a promising playground to engineer Dirac and topological materials using chemical substitution or other macroscopic control parameters. Our present approach can be applied to a wide class of materials described by the d−p effective Hamiltonian.
[1] N. P. Armitage, E. J. Mele, A. Vishwanath, Rev. Mod. Phys. 90, 15001 (2018)
[2] N. Nilforoushan et al., PNAS 118, e2108617118 (2021)
*We acknowledge eDARI computational grant.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700