TY - JOUR
T1 - Anisotropic proximity-induced superconductivity and edge supercurrent in Kagome metal, K1-xV3Sb5
AU - Wang, Yaojia
AU - Yang, Shuo Ying
AU - Sivakumar, Pranava K.
AU - Ortiz, Brenden R.
AU - Teicher, Samuel M.L.
AU - Wu, Heng
AU - Srivastava, Abhay K.
AU - Garg, Chirag
AU - Ali, Mazhar N.
AU - More Authors, null
PY - 2023
Y1 - 2023
N2 - Materials with Kagome nets are of particular importance for their potential combination of strong correlation, exotic magnetism, and electronic topology. KV3Sb5 was discovered to be a layered topological metal with a Kagome net of vanadium. Here, we fabricated Josephson Junctions of K1-xV3Sb5 and induced superconductivity over long junction lengths. Through magnetoresistance and current versus phase measurements, we observed a magnetic field sweeping direction-dependent magnetoresistance and an anisotropic interference pattern with a Fraunhofer pattern for in-plane magnetic field but a suppression of critical current for out-of-plane magnetic field. These results indicate an anisotropic internal magnetic field in K1-xV3Sb5 that influences the superconducting coupling in the junction, possibly giving rise to spin-triplet superconductivity. In addition, the observation of long-lived fast oscillations shows evidence of spatially localized conducting channels arising from edge states. These observations pave the way for studying unconventional superconductivity and Josephson device based on Kagome metals with electron correlation and topology.
AB - Materials with Kagome nets are of particular importance for their potential combination of strong correlation, exotic magnetism, and electronic topology. KV3Sb5 was discovered to be a layered topological metal with a Kagome net of vanadium. Here, we fabricated Josephson Junctions of K1-xV3Sb5 and induced superconductivity over long junction lengths. Through magnetoresistance and current versus phase measurements, we observed a magnetic field sweeping direction-dependent magnetoresistance and an anisotropic interference pattern with a Fraunhofer pattern for in-plane magnetic field but a suppression of critical current for out-of-plane magnetic field. These results indicate an anisotropic internal magnetic field in K1-xV3Sb5 that influences the superconducting coupling in the junction, possibly giving rise to spin-triplet superconductivity. In addition, the observation of long-lived fast oscillations shows evidence of spatially localized conducting channels arising from edge states. These observations pave the way for studying unconventional superconductivity and Josephson device based on Kagome metals with electron correlation and topology.
UR - http://www.scopus.com/inward/record.url?scp=85164541678&partnerID=8YFLogxK
U2 - 10.1126/sciadv.adg7269
DO - 10.1126/sciadv.adg7269
M3 - Article
C2 - 37436976
AN - SCOPUS:85164541678
SN - 2375-2548
VL - 9
SP - eadg7269
JO - Science Advances
JF - Science Advances
IS - 28
M1 - eadg7269
ER -