论文标题
安格里夫干涉仪中远程自旋三元组件的签名
Signatures of Long-Range Spin-Triplet Component in Andreev Interferometer
论文作者
论文摘要
我们分析了约瑟夫森（Josephson），$ i_ {j} $和耗散性，$ i_ {v} $，在有远程旋转三重态组件（LRSTC）的情况下，在磁性Andreev干涉仪中的电流。 Andreev干涉仪具有类似跨的几何形状，由Sf $ _ {l} $ - f- f $ _ {r} $ s电路，垂直于它的n -f -n电路，其中s，f $ _ {l，r} $是超级导管和弱芳族化合物， $ \ mathbf {m} _ {l，r} $，F是一个强大的Ferromagnet，具有高交换能量。铁电线F可以用非磁性线n代替。在弱接近效应（PE）的极限下，我们获得了电流$ i_ {j} $和$ i_ {v} $的简单分析表达式。特别是，长约约瑟夫森连接处（JJ）中的关键Josephson电流为$ i_ {c}（α，β）= i_ {0c}χ（α，β）$，其中$χ（α，β）函数是Angles $（α，β）_ {α，β）的功能$ \ mathbf {m} _ {l，r} $。 N -f（n） - n电路中的耗散电流$ i_ {OSC}（v）=χ（α，β）\cosφi_{0}（v）$的振荡部分取决于角度$（α，β）_ {l，r，r} $ coss $（α，r，r} $ cains the Cartion $ aSE $} $}当前的$ i} c。大于$ i_ {c}（α，β）$。在某些角度，当前的$ i_ {c}（α，β）$更改符号。我们简要讨论负电流$ i_ {C} $与顺磁响应之间的关系。我们认为，N -f（n）-n电路中电导的测量值可用作识别S/F异质结构中LRSTC的另一种互补方法。
We analyze the Josephson,$I_{J}$, and dissipative,$I_{V}$, currents in a magnetic Andreev interferometer in the presence of the long-range spin triplet component (LRSTC). Andreev interferometer has a cross-like geometry and consists of a SF$_{l}$ - F - F$_{r}$S circuit and perpendicular to it a N - F - N circuit, where S, F$_{l,r}$ are superconductors and weak ferromagnets with non-collinear magnetisations $\mathbf{M}_{l,r}$, F is a strong ferromagnet with a high exchange energy. The ferromagnetic wire F can be replaced with a non-magnetic wire n. In the limit of a weak proximity effect (PE), we obtain simple analytical expressions for the currents $I_{J}$ and $I_{V}$. In particular, the critical Josephson current in a long Josephson junction (JJ) is $I_{c}(α,β)=I_{0c}χ(α,β)$, where the function $% χ(α,β)$ is a function of angles $(α,β)_{l,r}$ that characterize the orientations of $\mathbf{M}_{l,r}$. The oscillating part of the dissipative current $I_{osc}(V)=χ(α,β)\cos φI_{0}(V)$ in the N - F(n)- N circuit depends on the angles $(α,β)_{l,r}$ in the same way as the critical Josephson current $I_{c}(α,β)$, but can be much greater than the $I_{c}(α,β)$. At some angles the current $I_{c}(α,β)$ changes sign. We briefly discuss a relation between the negative current $I_{c}$ and paramagnetic response. We argue that the measurements of the conductance in N - F(n) - N circuit can be used as another complementary method to identify the LRSTC in S/F heterostructures.
