Sixfold enhancement of superconductivity in a tunable electronic nematic system
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Sixfold enhancement of superconductivity in a tunable electronic nematic system. / Eckberg, Chris; Campbell, Daniel J.; Metz, Tristin; Collini, John; Hodovanets, Halyna; Drye, Tyler; Zavalij, Peter; Christensen, Morten H.; Fernandes, Rafael M.; Lee, Sangjun; Abbamonte, Peter; Lynn, Jeffrey W.; Paglione, Johnpierre.
I: Nature Physics, Bind 16, Nr. 3, 01.03.2020, s. 346-350.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Sixfold enhancement of superconductivity in a tunable electronic nematic system
AU - Eckberg, Chris
AU - Campbell, Daniel J.
AU - Metz, Tristin
AU - Collini, John
AU - Hodovanets, Halyna
AU - Drye, Tyler
AU - Zavalij, Peter
AU - Christensen, Morten H.
AU - Fernandes, Rafael M.
AU - Lee, Sangjun
AU - Abbamonte, Peter
AU - Lynn, Jeffrey W.
AU - Paglione, Johnpierre
N1 - Publisher Copyright: © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - The electronic nematic phase—in which electronic degrees of freedom lower the crystal rotational symmetry—is commonly observed in high-temperature superconductors. However, understanding the role of nematicity and nematic fluctuations in Cooper pairing is often made more complicated by the coexistence of other orders, particularly long-range magnetic order. Here we report the enhancement of superconductivity in a model electronic nematic system that is not magnetic, and show that the enhancement is directly born out of strong nematic fluctuations associated with a quantum phase transition. We present measurements of the resistance as a function of strain in Ba1−xSrxNi2As2 to show that strontium substitution promotes an electronically driven nematic order in this system. In addition, the complete suppression of that order to absolute zero temperature leads to an enhancement of the pairing strength, as evidenced by a sixfold increase in the superconducting transition temperature. The direct relation between enhanced pairing and nematic fluctuations in this model system, as well as the interplay with a unidirectional charge-density-wave order comparable to that found in the cuprates, offers a means to investigate the role of nematicity in strengthening superconductivity.
AB - The electronic nematic phase—in which electronic degrees of freedom lower the crystal rotational symmetry—is commonly observed in high-temperature superconductors. However, understanding the role of nematicity and nematic fluctuations in Cooper pairing is often made more complicated by the coexistence of other orders, particularly long-range magnetic order. Here we report the enhancement of superconductivity in a model electronic nematic system that is not magnetic, and show that the enhancement is directly born out of strong nematic fluctuations associated with a quantum phase transition. We present measurements of the resistance as a function of strain in Ba1−xSrxNi2As2 to show that strontium substitution promotes an electronically driven nematic order in this system. In addition, the complete suppression of that order to absolute zero temperature leads to an enhancement of the pairing strength, as evidenced by a sixfold increase in the superconducting transition temperature. The direct relation between enhanced pairing and nematic fluctuations in this model system, as well as the interplay with a unidirectional charge-density-wave order comparable to that found in the cuprates, offers a means to investigate the role of nematicity in strengthening superconductivity.
UR - http://www.scopus.com/inward/record.url?scp=85077140934&partnerID=8YFLogxK
U2 - 10.1038/s41567-019-0736-9
DO - 10.1038/s41567-019-0736-9
M3 - Journal article
AN - SCOPUS:85077140934
VL - 16
SP - 346
EP - 350
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
IS - 3
ER -
ID: 398068626