TY - JOUR
T1 - Absence of precursor incommensurate charge order in electronic nematic Ba0.35Sr0.65Ni2As2
AU - Collini, John
AU - Lee, Sangjun
AU - Sun, Stella X.L.
AU - Eckberg, Chris
AU - Campbell, Daniel J.
AU - Abbamonte, Peter
AU - Paglione, Johnpierre
N1 - X-ray experiments were supported by the U.S. Department of Energy, Office of Basic Energy Sciences grant No. DE-FG02-06ER46285 (P.A.) and the Institute for Complex Adaptive Matter (J.C.). Low-temperature measurements were supported by the National Science Foundation Grant No. DMR1905891 (J.P.), and J.P. and P.A. acknowledge the Gordon and Betty Moore Foundation's EPiQS Initiative through Grants No. GBMF9071 and No. GBMF9452, respectively.
PY - 2022/8/1
Y1 - 2022/8/1
N2 - Recent discoveries of charge order and electronic nematic order in the iron-based superconductors and cuprates have pointed towards the possibility of nematic and charge fluctuations playing a role in the enhancement of superconductivity. The Ba1-xSrxNi2As2 system, closely related in structure to the BaFe2As2 system, has recently been shown to exhibit both types of ordering without the presence of any magnetic order. We report single-crystal x-ray diffraction experiments on Ba0.35Sr0.65Ni2As2, providing evidence that the previously reported incommensurate charge order with wave-vector (0,0.28,0)tet in the tetragonal state of BaNi2As2 vanishes by 65% Sr substitution together with nematic order. Our measurements suggest that the nematic and incommensurate charge orders are closely tied in the tetragonal state and show that the (0,0.33,0)tri charge ordering in the triclinic phase of BaNi2As2 evolves to become (0,0.5,0)tri charge ordering at x=0.65 before vanishing at x=0.71.
AB - Recent discoveries of charge order and electronic nematic order in the iron-based superconductors and cuprates have pointed towards the possibility of nematic and charge fluctuations playing a role in the enhancement of superconductivity. The Ba1-xSrxNi2As2 system, closely related in structure to the BaFe2As2 system, has recently been shown to exhibit both types of ordering without the presence of any magnetic order. We report single-crystal x-ray diffraction experiments on Ba0.35Sr0.65Ni2As2, providing evidence that the previously reported incommensurate charge order with wave-vector (0,0.28,0)tet in the tetragonal state of BaNi2As2 vanishes by 65% Sr substitution together with nematic order. Our measurements suggest that the nematic and incommensurate charge orders are closely tied in the tetragonal state and show that the (0,0.33,0)tri charge ordering in the triclinic phase of BaNi2As2 evolves to become (0,0.5,0)tri charge ordering at x=0.65 before vanishing at x=0.71.
UR - https://www.scopus.com/pages/publications/85137719736
UR - https://www.scopus.com/pages/publications/85137719736#tab=citedBy
U2 - 10.1103/PhysRevB.106.054107
DO - 10.1103/PhysRevB.106.054107
M3 - Article
AN - SCOPUS:85137719736
SN - 2469-9950
VL - 106
JO - Physical Review B
JF - Physical Review B
IS - 5
M1 - 054107
ER -