论文标题
相关的重费超导体UTE2中Schottky异常的正常状态和起源的结构
Structure of the normal state and origin of Schottky anomaly in the correlated heavy fermion superconductor UTe2
论文作者
论文摘要
新发现的UTE2超导体被视为一种重型繁荣混合价系统，具有正常和超导状态的非常特性的特性。它没有磁性的迹象，而是磁敏感性和超导临界场的强各向异性。 In addition to the heavy fermion-like behavior in the normal state, it exhibits also a distinctive Schottky-type anomaly at about 12 K and a characteristic excitations gap ~35-40 K. Here we show, by virtue of dynamical mean-field theory calculations with a quasi-atomic treatment of electron correlations, that ab-initio derived crystal-field splitting of the 5f2 ionic configuration yields an agreement with these experimental观察。我们分析了磁性和多极矩波的对称性，这可能会导致低温下的超导配对。揭示了在近托停滞情景中的ute2正常顺磁状态与URU2SI2的近似类比。
The newly discovered UTe2 superconductor is regarded as a heavy fermion mixed-valence system with very peculiar properties within the normal and superconducting states. It shows no signs of magnetic order but strong anisotropy of a magnetic susceptibility and a superconducting critical field. In addition to the heavy fermion-like behavior in the normal state, it exhibits also a distinctive Schottky-type anomaly at about 12 K and a characteristic excitations gap ~35-40 K. Here we show, by virtue of dynamical mean-field theory calculations with a quasi-atomic treatment of electron correlations, that ab-initio derived crystal-field splitting of the 5f2 ionic configuration yields an agreement with these experimental observations. We analyze the symmetry of magnetic and multipolar moment fluctuations that might lead to the superconducting pairing at low temperatures. A close analogy of the normal paramagnetic state of UTe2 to that of URu2Si2 in the Kondo arrest scenario is revealed.
