Superconducting gap symmetry from Bogoliubov quasiparticle interference analysis on Sr2RuO4
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Superconducting gap symmetry from Bogoliubov quasiparticle interference analysis on Sr2RuO4. / Bhattacharyya, Shinibali; Kreisel, Andreas; Kong, X.; Berlijn, T.; Romer, Astrid T.; Andersen, Brian M.; Hirschfeld, P. J.
I: Physical Review B, Bind 107, Nr. 14, 144505, 11.04.2023.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Superconducting gap symmetry from Bogoliubov quasiparticle interference analysis on Sr2RuO4
AU - Bhattacharyya, Shinibali
AU - Kreisel, Andreas
AU - Kong, X.
AU - Berlijn, T.
AU - Romer, Astrid T.
AU - Andersen, Brian M.
AU - Hirschfeld, P. J.
PY - 2023/4/11
Y1 - 2023/4/11
N2 - The nature of the superconducting order parameter in Sr2RuO4 has generated intense interest in recent years. Since the superconducting gap is very small, high-resolution methods such as scanning tunneling spectroscopy might be the best chance to directly resolve the gap symmetry. Recently, a Bogoliubov quasiparticle interference imaging (BQPI) experiment has suggested that the dx2-y2 gap symmetry is appropriate for Sr2RuO4. In this work, we use a material-specific theoretical approach based on Wannier functions of the surface of Sr2RuO4 to calculate the continuum density of states as detected in scanning tunneling microscopy experiments. We examine several different proposed gap order parameters and calculate the expected BQPI pattern for each case. Comparing to the available experimental data, our results suggest that a s' + idxy gap order parameter is the most probable state, but the measured BQPI patterns still display features unaccounted for by the theory for any of the states currently under discussion.
AB - The nature of the superconducting order parameter in Sr2RuO4 has generated intense interest in recent years. Since the superconducting gap is very small, high-resolution methods such as scanning tunneling spectroscopy might be the best chance to directly resolve the gap symmetry. Recently, a Bogoliubov quasiparticle interference imaging (BQPI) experiment has suggested that the dx2-y2 gap symmetry is appropriate for Sr2RuO4. In this work, we use a material-specific theoretical approach based on Wannier functions of the surface of Sr2RuO4 to calculate the continuum density of states as detected in scanning tunneling microscopy experiments. We examine several different proposed gap order parameters and calculate the expected BQPI pattern for each case. Comparing to the available experimental data, our results suggest that a s' + idxy gap order parameter is the most probable state, but the measured BQPI patterns still display features unaccounted for by the theory for any of the states currently under discussion.
KW - ENERGY GAPS
U2 - 10.1103/PhysRevB.107.144505
DO - 10.1103/PhysRevB.107.144505
M3 - Journal article
VL - 107
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 14
M1 - 144505
ER -
ID: 346581455