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Electronic structure and enhanced charge-density wave order of monolayer VSe2

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Electronic structure and enhanced charge-density wave order of monolayer VSe2. / Feng, Jiagui; Biswas, Deepnarayan; Akhil, Rajan; Watson, Matthew D.; Mazzola, Federico; Clark, Oliver Jon; Underwood, Kaycee; Markovic, Igor; McLaren, Martin; Hunter, Andrew; Burn, David M.; Duffy, Liam B.; Barua, Sourabh; Balakrishnan, Geetha; Bertran, François; Le Fevre, Patrick; Kim, Timur K.; van der Laan, Gerrit; Hesjedal, Thorsten; Wahl, Peter; King, Philip D C.

In: Nano Letters, Vol. 18, No. 7, 11.07.2018, p. 4493-4499.

Research output: Contribution to journalLetterpeer-review

Harvard

Feng, J, Biswas, D, Akhil, R, Watson, MD, Mazzola, F, Clark, OJ, Underwood, K, Markovic, I, McLaren, M, Hunter, A, Burn, DM, Duffy, LB, Barua, S, Balakrishnan, G, Bertran, F, Le Fevre, P, Kim, TK, van der Laan, G, Hesjedal, T, Wahl, P & King, PDC 2018, 'Electronic structure and enhanced charge-density wave order of monolayer VSe2', Nano Letters, vol. 18, no. 7, pp. 4493-4499. https://doi.org/10.1021/acs.nanolett.8b01649

APA

Feng, J., Biswas, D., Akhil, R., Watson, M. D., Mazzola, F., Clark, O. J., Underwood, K., Markovic, I., McLaren, M., Hunter, A., Burn, D. M., Duffy, L. B., Barua, S., Balakrishnan, G., Bertran, F., Le Fevre, P., Kim, T. K., van der Laan, G., Hesjedal, T., ... King, P. D. C. (2018). Electronic structure and enhanced charge-density wave order of monolayer VSe2. Nano Letters, 18(7), 4493-4499. https://doi.org/10.1021/acs.nanolett.8b01649

Vancouver

Feng J, Biswas D, Akhil R, Watson MD, Mazzola F, Clark OJ et al. Electronic structure and enhanced charge-density wave order of monolayer VSe2. Nano Letters. 2018 Jul 11;18(7):4493-4499. https://doi.org/10.1021/acs.nanolett.8b01649

Author

Feng, Jiagui ; Biswas, Deepnarayan ; Akhil, Rajan ; Watson, Matthew D. ; Mazzola, Federico ; Clark, Oliver Jon ; Underwood, Kaycee ; Markovic, Igor ; McLaren, Martin ; Hunter, Andrew ; Burn, David M. ; Duffy, Liam B. ; Barua, Sourabh ; Balakrishnan, Geetha ; Bertran, François ; Le Fevre, Patrick ; Kim, Timur K. ; van der Laan, Gerrit ; Hesjedal, Thorsten ; Wahl, Peter ; King, Philip D C. / Electronic structure and enhanced charge-density wave order of monolayer VSe2. In: Nano Letters. 2018 ; Vol. 18, No. 7. pp. 4493-4499.

Bibtex - Download

@article{6b32f7dbb25048dfbf376400bed6377f,
title = "Electronic structure and enhanced charge-density wave order of monolayer VSe2",
abstract = "How the interacting electronic states and phases of layered transition-metal dichalcogenides evolve when thinned to the single-layer limit is a key open question in the study of two-dimensional materials. Here, we use angle-resolved photoemission to investigate the electronic structure of monolayer VSe2 grown on bi-layer graphene/SiC. While the global electronic structure is similar to that of bulk VSe2, we show that, for the monolayer, pronounced energy gaps develop over the entire Fermi surface with decreasing temperature below Tc = 140 ± 5 K, concomitant with the emergence of charge-order superstructures evident in low-energy electron diraction. These observations point to a charge-density wave instability in the monolayer which is strongly enhanced over that of the bulk. Moreover, our measurements of both the electronic structure and of x-ray magnetic circular dichroism reveal no signatures of a ferromagnetic ordering, in contrast to the results of a recent experimental study as well as expectations from density-functional theory. Our study thus points to a delicate balance that can be realised between competing interacting states and phases in monolayer transition-metal dichalcogenides.",
keywords = "VSe2, Charge-density wave, Transition-metal dichalcogenide, Monolayer",
author = "Jiagui Feng and Deepnarayan Biswas and Rajan Akhil and Watson, {Matthew D.} and Federico Mazzola and Clark, {Oliver Jon} and Kaycee Underwood and Igor Markovic and Martin McLaren and Andrew Hunter and Burn, {David M.} and Duffy, {Liam B.} and Sourabh Barua and Geetha Balakrishnan and Fran{\c c}ois Bertran and {Le Fevre}, Patrick and Kim, {Timur K.} and {van der Laan}, Gerrit and Thorsten Hesjedal and Peter Wahl and King, {Philip D C.}",
note = "We gratefully acknowledge support from The Leverhulme Trust (Grant Nos. RL-2016-006 and PLP-2015-144), The Royal Society, The Engineering and Physical Sciences Research Council, UK, for support under grant Nos. EP/I031014/1, EP/M023958/1, EP/P020151/1, and EP/M028771/1, and the International Max-Planck Partnership for Measurement and Observation at the Quantum Limit. OJC and KU acknowledge EPSRC for PhD studentship support through grant Nos. EP/K503162/1 and EP/L015110/1. IM acknowledges PhD studentship support from the IMPRS for the Chemistry and Physics of Quantum Materials. LBD acknowledges studentship support from EPSRC and the Science and Technology Facilities Council (UK).",
year = "2018",
month = jul,
day = "11",
doi = "10.1021/acs.nanolett.8b01649",
language = "English",
volume = "18",
pages = "4493--4499",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "7",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Electronic structure and enhanced charge-density wave order of monolayer VSe2

AU - Feng, Jiagui

AU - Biswas, Deepnarayan

AU - Akhil, Rajan

AU - Watson, Matthew D.

AU - Mazzola, Federico

AU - Clark, Oliver Jon

AU - Underwood, Kaycee

AU - Markovic, Igor

AU - McLaren, Martin

AU - Hunter, Andrew

AU - Burn, David M.

AU - Duffy, Liam B.

AU - Barua, Sourabh

AU - Balakrishnan, Geetha

AU - Bertran, François

AU - Le Fevre, Patrick

AU - Kim, Timur K.

AU - van der Laan, Gerrit

AU - Hesjedal, Thorsten

AU - Wahl, Peter

AU - King, Philip D C.

N1 - We gratefully acknowledge support from The Leverhulme Trust (Grant Nos. RL-2016-006 and PLP-2015-144), The Royal Society, The Engineering and Physical Sciences Research Council, UK, for support under grant Nos. EP/I031014/1, EP/M023958/1, EP/P020151/1, and EP/M028771/1, and the International Max-Planck Partnership for Measurement and Observation at the Quantum Limit. OJC and KU acknowledge EPSRC for PhD studentship support through grant Nos. EP/K503162/1 and EP/L015110/1. IM acknowledges PhD studentship support from the IMPRS for the Chemistry and Physics of Quantum Materials. LBD acknowledges studentship support from EPSRC and the Science and Technology Facilities Council (UK).

PY - 2018/7/11

Y1 - 2018/7/11

N2 - How the interacting electronic states and phases of layered transition-metal dichalcogenides evolve when thinned to the single-layer limit is a key open question in the study of two-dimensional materials. Here, we use angle-resolved photoemission to investigate the electronic structure of monolayer VSe2 grown on bi-layer graphene/SiC. While the global electronic structure is similar to that of bulk VSe2, we show that, for the monolayer, pronounced energy gaps develop over the entire Fermi surface with decreasing temperature below Tc = 140 ± 5 K, concomitant with the emergence of charge-order superstructures evident in low-energy electron diraction. These observations point to a charge-density wave instability in the monolayer which is strongly enhanced over that of the bulk. Moreover, our measurements of both the electronic structure and of x-ray magnetic circular dichroism reveal no signatures of a ferromagnetic ordering, in contrast to the results of a recent experimental study as well as expectations from density-functional theory. Our study thus points to a delicate balance that can be realised between competing interacting states and phases in monolayer transition-metal dichalcogenides.

AB - How the interacting electronic states and phases of layered transition-metal dichalcogenides evolve when thinned to the single-layer limit is a key open question in the study of two-dimensional materials. Here, we use angle-resolved photoemission to investigate the electronic structure of monolayer VSe2 grown on bi-layer graphene/SiC. While the global electronic structure is similar to that of bulk VSe2, we show that, for the monolayer, pronounced energy gaps develop over the entire Fermi surface with decreasing temperature below Tc = 140 ± 5 K, concomitant with the emergence of charge-order superstructures evident in low-energy electron diraction. These observations point to a charge-density wave instability in the monolayer which is strongly enhanced over that of the bulk. Moreover, our measurements of both the electronic structure and of x-ray magnetic circular dichroism reveal no signatures of a ferromagnetic ordering, in contrast to the results of a recent experimental study as well as expectations from density-functional theory. Our study thus points to a delicate balance that can be realised between competing interacting states and phases in monolayer transition-metal dichalcogenides.

KW - VSe2

KW - Charge-density wave

KW - Transition-metal dichalcogenide

KW - Monolayer

U2 - 10.1021/acs.nanolett.8b01649

DO - 10.1021/acs.nanolett.8b01649

M3 - Letter

VL - 18

SP - 4493

EP - 4499

JO - Nano Letters

JF - Nano Letters

SN - 1530-6984

IS - 7

ER -

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