TY  - JOUR
AU  - Mahatha, Sanjoy Kr
AU  - Phillips, Jan
AU  - Corral-Sertal, Javier
AU  - Subires, David
AU  - Korshunov, Artem
AU  - Kar, Arunava
AU  - Buck, Jens
AU  - Diekmann, Florian
AU  - Garbarino, Gaston
AU  - Ivanov, Yurii P.
AU  - Chuvilin, Andrey
AU  - Mondal, Debashis
AU  - Vobornik, Ivana
AU  - Bosak, Alexei
AU  - Rossnagel, Kai
AU  - Pardo, Victor
AU  - Fumega, Adolfo O.
AU  - Blanco-Canosa, Santiago
TI  - Self-Stacked 1T-1H Layers in 6R-NbSeTe and the Emergence of Charge and Magnetic Correlations Due to Ligand Disorder
JO  - ACS nano
VL  - 18
IS  - 32
SN  - 1936-0851
CY  - Washington, DC
PB  - Soc.
M1  - PUBDB-2024-05620
SP  - 21052-21060
PY  - 2024
N1  - restricted document, copyright restrictions
AB  - The emergence of correlated phenomena arising from the combination of 1T and 1H van der Waals layers is the focus of intense research. Here, we synthesize a self-stacked 6R phase in NbSeTe, showing perfect alternating 1T and 1H layers that grow coherently along the c-direction, as revealed by scanning transmission electron microscopy. Angle-resolved photoemission spectroscopy shows a mixed contribution of the trigonal and octahedral Nb bands to the Fermi level. Diffuse scattering reveals temperature-independent short-range charge fluctuations with propagation vector qCO = (0.25 0), derived from the condensation of a longitudinal mode in the 1T layer, while the long-range charge density wave is quenched by ligand disorder. Magnetization measurements suggest the presence of an inhomogeneous, short-range magnetic order, further supported by the absence of a clear phase transition in the specific heat. These experimental analyses in combination with ab initio calculations indicate that the ground state of 6R-NbSeTe is described by a statistical distribution of short-range charge-modulated and spin-correlated regions driven by ligand disorder. Our results demonstrate how natural 1T-1H self-stacked bulk heterostructures can be used to engineer emergent phases of matter.
LB  - PUB:(DE-HGF)16
C6  - pmid:39086092
UR  - <Go to ISI:>//WOS:001282968100001
DO  - DOI:10.1021/acsnano.4c02005
UR  - https://bib-pubdb1.desy.de/record/613732
ER  -