2000 character limit reached
Zero-field finite-momentum and field-induced superconductivity in altermagnets
Published 25 Sep 2023 in cond-mat.supr-con, cond-mat.mes-hall, cond-mat.mtrl-sci, and cond-mat.str-el | (2309.14427v2)
Abstract: We explore the possibilities for spin-singlet superconductivity in newly discovered altermagnets. Investigating $d$-wave altermagnets, we show that finite-momentum superconductivity can easily emerge in altermagnets even though they have no net magnetization, when the superconducting order parameter also has $d$-wave symmetry with nodes coinciding with the altermagnet nodes. Additionally, we find a rich phase diagram when both altermagnetism and an external magnetic field are considered, including superconductivity appearing at high magnetic fields from a parent zero-field normal state.
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