Orbital selective commensurate modulations of the local density of states in ScV<sub>6</sub>Sn<sub>6</sub> probed by nuclear spins.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39294113.
- Also identified by DOI 10.1038/s41467-024-52456-6 and PMC identifier 11411110.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The kagome network is a unique platform that harbors a diversity of special electronic states due to its inherent band structure features comprising Dirac cones, van Hove singularities, and flat bands. Some kagome-based metals have recently been found to exhibit favorable properties, including superconductivity, charge order, and signatures of an anomalous Hall effect. The kagome system ScV<sub>6</sub>Sn<sub>6</sub> is a promising candidate for studying the emergence of an unconventional charge order and accompanying effects. We use <sup>51</sup>V nuclear magnetic resonance to explore the local properties of the charge ordered phase in single crystalline ScV<sub>6</sub>Sn<sub>6</sub>, aided by density functional theory. We show the local charge symmetry of V to reflect a commensurate modulation with <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>q</mi> <mo>=</mo> <mfenced> <mrow> <mfrac><mrow><mn>1</mn></mrow> <mrow><mn>3</mn></mrow> </mfrac> <mo>,</mo> <mfrac><mrow><mn>1</mn></mrow> <mrow><mn>3</mn></mrow> </mfrac> <mo>,</mo> <mfrac><mrow><mn>1</mn></mrow> <mrow><mn>3</mn></mrow> </mfrac> </mrow> </mfenced> </math> , the density of states to drop by about a factor of <math xmlns="http://www.w3.org/1998/Math/MathML"> <msqrt><mrow><mn>2</mn></mrow> </msqrt> </math> during the phase transition, and an unusual orientation dependent change in the shift splitting symmetry to reveal orbital selective modulations of the local density of states.