Observation of Fowler-Nordheim hole tunneling across an electron tunnel junction due to total symmetry filtering
Observation of Fowler-Nordheim hole tunneling across an electron tunnel junction due to total symmetry filtering
复制标题
观察由于全对称滤波而导致的穿过电子隧道结的 Fowler-Nordheim 空穴隧道效应
DOI：
10.1103/physrevb.73.140408
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发表时间：
2006
影响因子：
3.7
通讯作者：
P. Dederichs
中科院分区：
文献类型：
--
作者：
M. Bowen;A. Barthélémy;V. Bellini;M. Bibes;P. Sénéor;E. Jacquet;J. Contour;P. Dederichs
利用${\mathrm{SrTiO}}_{3}(001)$势垒和${\mathrm{La}}_{0.7}}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}(001)$电极，我们研究了电子的相干自旋极化隧穿与较低电子势垒高度不对称的情况。由于这种不匹配，由于全对称滤波，具有高于该势垒高度能量的电子继续隧穿。这使我们能够观察到在这个电子隧道结上对称匹配的空穴隧道，特别是在空穴势垒高度以上的Fowler-Nordheim空穴区内的自旋极化振荡，从而丰富了目前有限偏置下相干自旋极化隧道的理论图像。
Using a ${\mathrm{SrTiO}}_{3}(001)$ barrier and ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}(001)$ electrodes, we study the case of coherent spin-polarized tunneling of electrons that exhibit a symmetry mismatch with respect to the lower electron barrier height. Due to this mismatch, electrons with energy above this barrier height continue to tunnel thanks to total symmetry filtering. This allows us to observe symmetry-matched hole tunneling across this electron tunnel junction, and in particular spin-polarized oscillations in the Fowler-Nordheim hole regime above the hole barrier height, thereby enriching the present theoretical picture of coherent spin-polarized tunneling at finite bias.