Emergence of coherence in the charge-density wave state of 2H-NbSe2

U. Chatterjee, J. Zhao, M. Iavarone, R. Di Capua, J. P. Castellan, G. Karapetrov, C. D. Malliakas, Mercouri G Kanatzidis, H. Claus, J. P C Ruff, F. Weber, J. Van Wezel, J. C. Campuzano, R. Osborn, M. Randeria, N. Trivedi, M. R. Norman, S. Rosenkranz

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A charge-density wave (CDW) state has a broken symmetry described by a complex order parameter with an amplitude and a phase. The conventional view, based on clean, weak-coupling systems, is that a finite amplitude and long-range phase coherence set in simultaneously at the CDW transition temperature Tcdw. Here we investigate, using photoemission, X-ray scattering and scanning tunnelling microscopy, the canonical CDW compound 2H-NbSe2 intercalated with Mn and Co, and show that the conventional view is untenable. We find that, either at high temperature or at large intercalation, CDW order becomes short-ranged with a well-defined amplitude, which has impacts on the electronic dispersion, giving rise to an energy gap. The phase transition at Tcdw marks the onset of long-range order with global phase coherence, leading to sharp electronic excitations. Our observations emphasize the importance of phase fluctuations in strongly coupled CDW systems and provide insights into the significance of phase incoherence in 'pseudogap' states.

Original languageEnglish
Article number6313
JournalNature Communications
Volume6
DOIs
Publication statusPublished - Feb 17 2015

Fingerprint

Scanning Tunnelling Microscopy
Charge density waves
Transition Temperature
Phase Transition
X-Rays
Temperature
phase coherence
incoherence
Photoemission
Scanning tunneling microscopy
Intercalation
X ray scattering
electronics
intercalation
scanning tunneling microscopy
broken symmetry
Energy gap
photoelectric emission
Phase transitions
transition temperature

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)
  • Physics and Astronomy(all)

Cite this

Chatterjee, U., Zhao, J., Iavarone, M., Di Capua, R., Castellan, J. P., Karapetrov, G., ... Rosenkranz, S. (2015). Emergence of coherence in the charge-density wave state of 2H-NbSe2. Nature Communications, 6, [6313]. https://doi.org/10.1038/ncomms7313

Emergence of coherence in the charge-density wave state of 2H-NbSe2. / Chatterjee, U.; Zhao, J.; Iavarone, M.; Di Capua, R.; Castellan, J. P.; Karapetrov, G.; Malliakas, C. D.; Kanatzidis, Mercouri G; Claus, H.; Ruff, J. P C; Weber, F.; Van Wezel, J.; Campuzano, J. C.; Osborn, R.; Randeria, M.; Trivedi, N.; Norman, M. R.; Rosenkranz, S.

In: Nature Communications, Vol. 6, 6313, 17.02.2015.

Research output: Contribution to journalArticle

Chatterjee, U, Zhao, J, Iavarone, M, Di Capua, R, Castellan, JP, Karapetrov, G, Malliakas, CD, Kanatzidis, MG, Claus, H, Ruff, JPC, Weber, F, Van Wezel, J, Campuzano, JC, Osborn, R, Randeria, M, Trivedi, N, Norman, MR & Rosenkranz, S 2015, 'Emergence of coherence in the charge-density wave state of 2H-NbSe2', Nature Communications, vol. 6, 6313. https://doi.org/10.1038/ncomms7313
Chatterjee U, Zhao J, Iavarone M, Di Capua R, Castellan JP, Karapetrov G et al. Emergence of coherence in the charge-density wave state of 2H-NbSe2. Nature Communications. 2015 Feb 17;6. 6313. https://doi.org/10.1038/ncomms7313
Chatterjee, U. ; Zhao, J. ; Iavarone, M. ; Di Capua, R. ; Castellan, J. P. ; Karapetrov, G. ; Malliakas, C. D. ; Kanatzidis, Mercouri G ; Claus, H. ; Ruff, J. P C ; Weber, F. ; Van Wezel, J. ; Campuzano, J. C. ; Osborn, R. ; Randeria, M. ; Trivedi, N. ; Norman, M. R. ; Rosenkranz, S. / Emergence of coherence in the charge-density wave state of 2H-NbSe2. In: Nature Communications. 2015 ; Vol. 6.
@article{a2368c65afad4297b03493855629db54,
title = "Emergence of coherence in the charge-density wave state of 2H-NbSe2",
abstract = "A charge-density wave (CDW) state has a broken symmetry described by a complex order parameter with an amplitude and a phase. The conventional view, based on clean, weak-coupling systems, is that a finite amplitude and long-range phase coherence set in simultaneously at the CDW transition temperature Tcdw. Here we investigate, using photoemission, X-ray scattering and scanning tunnelling microscopy, the canonical CDW compound 2H-NbSe2 intercalated with Mn and Co, and show that the conventional view is untenable. We find that, either at high temperature or at large intercalation, CDW order becomes short-ranged with a well-defined amplitude, which has impacts on the electronic dispersion, giving rise to an energy gap. The phase transition at Tcdw marks the onset of long-range order with global phase coherence, leading to sharp electronic excitations. Our observations emphasize the importance of phase fluctuations in strongly coupled CDW systems and provide insights into the significance of phase incoherence in 'pseudogap' states.",
author = "U. Chatterjee and J. Zhao and M. Iavarone and {Di Capua}, R. and Castellan, {J. P.} and G. Karapetrov and Malliakas, {C. D.} and Kanatzidis, {Mercouri G} and H. Claus and Ruff, {J. P C} and F. Weber and {Van Wezel}, J. and Campuzano, {J. C.} and R. Osborn and M. Randeria and N. Trivedi and Norman, {M. R.} and S. Rosenkranz",
year = "2015",
month = "2",
day = "17",
doi = "10.1038/ncomms7313",
language = "English",
volume = "6",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Emergence of coherence in the charge-density wave state of 2H-NbSe2

AU - Chatterjee, U.

AU - Zhao, J.

AU - Iavarone, M.

AU - Di Capua, R.

AU - Castellan, J. P.

AU - Karapetrov, G.

AU - Malliakas, C. D.

AU - Kanatzidis, Mercouri G

AU - Claus, H.

AU - Ruff, J. P C

AU - Weber, F.

AU - Van Wezel, J.

AU - Campuzano, J. C.

AU - Osborn, R.

AU - Randeria, M.

AU - Trivedi, N.

AU - Norman, M. R.

AU - Rosenkranz, S.

PY - 2015/2/17

Y1 - 2015/2/17

N2 - A charge-density wave (CDW) state has a broken symmetry described by a complex order parameter with an amplitude and a phase. The conventional view, based on clean, weak-coupling systems, is that a finite amplitude and long-range phase coherence set in simultaneously at the CDW transition temperature Tcdw. Here we investigate, using photoemission, X-ray scattering and scanning tunnelling microscopy, the canonical CDW compound 2H-NbSe2 intercalated with Mn and Co, and show that the conventional view is untenable. We find that, either at high temperature or at large intercalation, CDW order becomes short-ranged with a well-defined amplitude, which has impacts on the electronic dispersion, giving rise to an energy gap. The phase transition at Tcdw marks the onset of long-range order with global phase coherence, leading to sharp electronic excitations. Our observations emphasize the importance of phase fluctuations in strongly coupled CDW systems and provide insights into the significance of phase incoherence in 'pseudogap' states.

AB - A charge-density wave (CDW) state has a broken symmetry described by a complex order parameter with an amplitude and a phase. The conventional view, based on clean, weak-coupling systems, is that a finite amplitude and long-range phase coherence set in simultaneously at the CDW transition temperature Tcdw. Here we investigate, using photoemission, X-ray scattering and scanning tunnelling microscopy, the canonical CDW compound 2H-NbSe2 intercalated with Mn and Co, and show that the conventional view is untenable. We find that, either at high temperature or at large intercalation, CDW order becomes short-ranged with a well-defined amplitude, which has impacts on the electronic dispersion, giving rise to an energy gap. The phase transition at Tcdw marks the onset of long-range order with global phase coherence, leading to sharp electronic excitations. Our observations emphasize the importance of phase fluctuations in strongly coupled CDW systems and provide insights into the significance of phase incoherence in 'pseudogap' states.

UR - http://www.scopus.com/inward/record.url?scp=84923333369&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84923333369&partnerID=8YFLogxK

U2 - 10.1038/ncomms7313

DO - 10.1038/ncomms7313

M3 - Article

AN - SCOPUS:84923333369

VL - 6

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 6313

ER -