Volume 133, Number 2, January 2021
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||23 March 2021|
Multi-hole bands and quasi–two-dimensionality in Cr2Ge2Te6 studied by angle-resolved photoemission spectroscopy
1 National Synchrotron Light Source II, Brookhaven National Lab - Upton, NY 11973, USA
2 Nordita - Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden
3 Department of Physics, Princeton University - Princeton, NJ 08544, USA
4 Department of Physics, University of Connecticut - Storrs, CT 06269, USA
5 Department of Chemistry, Princeton University - Princeton, NJ 08544, USA
6 Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory Upton, NY 11973, USA
Received: 7 October 2020
Accepted: 11 December 2020
In the present work, we investigate the electronic structure of the two-dimensional ferromagnet Cr2Ge2Te6 by photoemission spectroscopy and ab initio calculations. Our results demonstrate the presence of multi-hole–type bands in the vicinity of the Fermi level indicating that the material can support high electrical conductivity by manipulating the chemical potential. Also, our photon energy-dependent angle-resolved photoemission experiment shows that several of the hole bands exhibit weak dispersion with varied incident photon energy providing experimental signature for the two-dimensional nature of Cr2Ge2Te6. Thereby, these findings can pave the way for further studies towards the application of Cr2Ge2Te6 in electronic devices.
PACS: 75.50.Dd – Nonmetallic ferromagnetic materials / 71.20.-b – Electron density of states and band structure of crystalline solids / 75.50.Pp – Magnetic semiconductors
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