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Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2

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Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2. / Wang, Q.; Sun, Z.; Rotenberg, E.; Ronning, F.; Bauer, E. D.; Lin, H.; Markiewicz, R. S.; Lindroos, M.; Barbiellini, B.; Bansil, A.; Dessau, D. S.

In: Physical Review B, Vol. 88, No. 23, 235125, 26.12.2013.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Wang, Q, Sun, Z, Rotenberg, E, Ronning, F, Bauer, ED, Lin, H, Markiewicz, RS, Lindroos, M, Barbiellini, B, Bansil, A & Dessau, DS 2013, 'Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2', Physical Review B, vol. 88, no. 23, 235125. https://doi.org/10.1103/PhysRevB.88.235125

APA

Wang, Q., Sun, Z., Rotenberg, E., Ronning, F., Bauer, E. D., Lin, H., ... Dessau, D. S. (2013). Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2. Physical Review B, 88(23), [235125]. https://doi.org/10.1103/PhysRevB.88.235125

Vancouver

Wang Q, Sun Z, Rotenberg E, Ronning F, Bauer ED, Lin H et al. Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2. Physical Review B. 2013 Dec 26;88(23). 235125. https://doi.org/10.1103/PhysRevB.88.235125

Author

Wang, Q. ; Sun, Z. ; Rotenberg, E. ; Ronning, F. ; Bauer, E. D. ; Lin, H. ; Markiewicz, R. S. ; Lindroos, M. ; Barbiellini, B. ; Bansil, A. ; Dessau, D. S. / Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2. In: Physical Review B. 2013 ; Vol. 88, No. 23.

Bibtex - Download

@article{cfe14abde781421cb87ff057e24edd4a,
title = "Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2",
abstract = "We used angle-resolved photoemission spectroscopy to make direct measurements of the electronic structure of the untwinned uniaxial state of CaFe2As2, the parent compound of an iron-based superconductor. The very small photon beam size, combined with the relatively large single-domain area on the crystal surfaces, allowed us to obtain the intrinsic symmetry-broken dispersions and Fermi surface (FS) geometries along the orthogonal Fe-Fe bond directions without any mechanical or magnetic detwinning processes. Comparing the optimized local density approximation calculations, an orbital-dependent band shifting is introduced to obtain better agreement, which is consistent with the development of orbital ordering. More interestingly, unidirectional straight and flat FS segments are observed near the zone center, which indicates the existence of a unidirectional charge density wave order. Our results indicate strong electronic anisotropy in CaFe2As2 and put strong constraints on theories for the iron-pnictide system.",
author = "Q. Wang and Z. Sun and E. Rotenberg and F. Ronning and Bauer, {E. D.} and H. Lin and Markiewicz, {R. S.} and M. Lindroos and B. Barbiellini and A. Bansil and Dessau, {D. S.}",
year = "2013",
month = "12",
day = "26",
doi = "10.1103/PhysRevB.88.235125",
language = "English",
volume = "88",
journal = "Physical Review B",
issn = "1098-0121",
publisher = "AMER PHYSICAL SOC",
number = "23",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Symmetry-broken electronic structure and uniaxial Fermi surface nesting of untwinned CaFe 2 As 2

AU - Wang, Q.

AU - Sun, Z.

AU - Rotenberg, E.

AU - Ronning, F.

AU - Bauer, E. D.

AU - Lin, H.

AU - Markiewicz, R. S.

AU - Lindroos, M.

AU - Barbiellini, B.

AU - Bansil, A.

AU - Dessau, D. S.

PY - 2013/12/26

Y1 - 2013/12/26

N2 - We used angle-resolved photoemission spectroscopy to make direct measurements of the electronic structure of the untwinned uniaxial state of CaFe2As2, the parent compound of an iron-based superconductor. The very small photon beam size, combined with the relatively large single-domain area on the crystal surfaces, allowed us to obtain the intrinsic symmetry-broken dispersions and Fermi surface (FS) geometries along the orthogonal Fe-Fe bond directions without any mechanical or magnetic detwinning processes. Comparing the optimized local density approximation calculations, an orbital-dependent band shifting is introduced to obtain better agreement, which is consistent with the development of orbital ordering. More interestingly, unidirectional straight and flat FS segments are observed near the zone center, which indicates the existence of a unidirectional charge density wave order. Our results indicate strong electronic anisotropy in CaFe2As2 and put strong constraints on theories for the iron-pnictide system.

AB - We used angle-resolved photoemission spectroscopy to make direct measurements of the electronic structure of the untwinned uniaxial state of CaFe2As2, the parent compound of an iron-based superconductor. The very small photon beam size, combined with the relatively large single-domain area on the crystal surfaces, allowed us to obtain the intrinsic symmetry-broken dispersions and Fermi surface (FS) geometries along the orthogonal Fe-Fe bond directions without any mechanical or magnetic detwinning processes. Comparing the optimized local density approximation calculations, an orbital-dependent band shifting is introduced to obtain better agreement, which is consistent with the development of orbital ordering. More interestingly, unidirectional straight and flat FS segments are observed near the zone center, which indicates the existence of a unidirectional charge density wave order. Our results indicate strong electronic anisotropy in CaFe2As2 and put strong constraints on theories for the iron-pnictide system.

UR - http://www.scopus.com/inward/record.url?scp=84892419860&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.88.235125

DO - 10.1103/PhysRevB.88.235125

M3 - Article

VL - 88

JO - Physical Review B

JF - Physical Review B

SN - 1098-0121

IS - 23

M1 - 235125

ER -