Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe. / Watson, Matthew D.; Haghighirad, Amir A.; Rhodes, Luke; Hoesch, Moritz ; Kim, Timur K.

In: New Journal of Physics, Vol. 19, 103021, 20.10.2017, p. 1-7.

Research output: Contribution to journalArticle

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Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe. / Watson, Matthew D.; Haghighirad, Amir A.; Rhodes, Luke; Hoesch, Moritz ; Kim, Timur K.

In: New Journal of Physics, Vol. 19, 103021, 20.10.2017, p. 1-7.

Research output: Contribution to journalArticle

Harvard

Watson, MD, Haghighirad, AA, Rhodes, L, Hoesch, M & Kim, TK 2017, 'Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe', New Journal of Physics, vol. 19, 103021, pp. 1-7. https://doi.org/10.1088/1367-2630/aa8a04

APA

Watson, M. D., Haghighirad, A. A., Rhodes, L., Hoesch, M., & Kim, T. K. (2017). Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe. New Journal of Physics, 19, 1-7. [103021]. https://doi.org/10.1088/1367-2630/aa8a04

Vancouver

Author

Watson, Matthew D. ; Haghighirad, Amir A. ; Rhodes, Luke ; Hoesch, Moritz ; Kim, Timur K. / Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe. In: New Journal of Physics. 2017 ; Vol. 19. pp. 1-7.

BibTeX

@article{a08dbc63148940389d427fcfa1339d08,
title = "Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe",
abstract = "We report high resolution angle-resolved photo-emission spectroscopy (ARPES) measurements of detwinned FeSe single crystals. The application of a mechanical strain is used to promote the volume fraction of one of the orthorhombic domains in the sample, which we estimate to be 80% detwinned. While the full structure of the electron pockets consisting of two crossed ellipses may be observed in the tetragonal phase at temperatures above 90 K, we find that remarkably, only one peanut-shaped electron pocket oriented along the longer a axis contributes to the ARPES measurement at low-temperatures in the nematic phase, with the expected pocket along b being not observed. Thus the low-temperature Fermi surface of FeSe as experimentally determined by ARPES consists of one elliptical hole pocket and one orthogonally-oriented peanut-shaped electron pocket. Our measurements clarify the long-standing controversies over the interpretation of ARPES measurements of FeSe.",
author = "Watson, {Matthew D.} and Haghighirad, {Amir A.} and Luke Rhodes and Moritz Hoesch and Kim, {Timur K.}",
year = "2017",
month = oct,
day = "20",
doi = "10.1088/1367-2630/aa8a04",
language = "English",
volume = "19",
pages = "1--7",
journal = "New Journal of Physics",
issn = "1367-2630",
publisher = "IOP Publishing Ltd.",

}

RIS

TY - JOUR

T1 - Electronic anisotropies revealed by detwinned angle-resolved photo-emission spectroscopy measurements of FeSe

AU - Watson, Matthew D.

AU - Haghighirad, Amir A.

AU - Rhodes, Luke

AU - Hoesch, Moritz

AU - Kim, Timur K.

PY - 2017/10/20

Y1 - 2017/10/20

N2 - We report high resolution angle-resolved photo-emission spectroscopy (ARPES) measurements of detwinned FeSe single crystals. The application of a mechanical strain is used to promote the volume fraction of one of the orthorhombic domains in the sample, which we estimate to be 80% detwinned. While the full structure of the electron pockets consisting of two crossed ellipses may be observed in the tetragonal phase at temperatures above 90 K, we find that remarkably, only one peanut-shaped electron pocket oriented along the longer a axis contributes to the ARPES measurement at low-temperatures in the nematic phase, with the expected pocket along b being not observed. Thus the low-temperature Fermi surface of FeSe as experimentally determined by ARPES consists of one elliptical hole pocket and one orthogonally-oriented peanut-shaped electron pocket. Our measurements clarify the long-standing controversies over the interpretation of ARPES measurements of FeSe.

AB - We report high resolution angle-resolved photo-emission spectroscopy (ARPES) measurements of detwinned FeSe single crystals. The application of a mechanical strain is used to promote the volume fraction of one of the orthorhombic domains in the sample, which we estimate to be 80% detwinned. While the full structure of the electron pockets consisting of two crossed ellipses may be observed in the tetragonal phase at temperatures above 90 K, we find that remarkably, only one peanut-shaped electron pocket oriented along the longer a axis contributes to the ARPES measurement at low-temperatures in the nematic phase, with the expected pocket along b being not observed. Thus the low-temperature Fermi surface of FeSe as experimentally determined by ARPES consists of one elliptical hole pocket and one orthogonally-oriented peanut-shaped electron pocket. Our measurements clarify the long-standing controversies over the interpretation of ARPES measurements of FeSe.

U2 - 10.1088/1367-2630/aa8a04

DO - 10.1088/1367-2630/aa8a04

M3 - Article

VL - 19

SP - 1

EP - 7

JO - New Journal of Physics

JF - New Journal of Physics

SN - 1367-2630

M1 - 103021

ER -