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Diluted oxide interface of LaAl1-xMnxO/SrTiO3 (LAMO/STO) provides a new way of tuning the ground states of the interface between the two band insulators of LAO and STO from metallic/superconducting to highly insulating. Increasing the Mn…

强关联电子 · 物理学 2019-10-02 Yulin Gan , Yu Zhang , Dennis V. Christensen , Nini Pryds , Yunzhong Chen

LaCrO$_3$ (LCO) / SrTiO$_3$ (STO) heterojunctions are intriguing due to a polar discontinuity along (001), two distinct and controllable interface structures [(LaO)$^+$/(TiO$_2$)$^0$ and (SrO)$^0$/(CrO$_2$)$^-$], and interface-induced…

In condensed matter physics the quasi two-dimensional electron gas at the interface of two different insulators, polar LaAlO3 on non-polar SrTiO3 (LaAlO3/SrTiO3) is a spectacular and surprising observation. This phenomenon is LaAlO3 film…

The oxide heterostructure LaAlO3/SrTiO3 supports a two-dimensional electron liquid with a variety of competing phases including magnetism, superconductivity and weak antilocalization due to Rashba spin-orbit coupling. Further confinement of…

The electric-field tunable Rashba spin-orbit coupling at the LaAlO3/SrTiO3 interface shows potential applications in spintronic devices. However, different gate dependence of the coupling strength has been reported in experiments. On the…

介观与纳米尺度物理 · 物理学 2020-07-01 Chunhai Yin , Patrick Seiler , Lucas M. K. Tang , Inge Leermakers , Nikita Lebedev , Uli Zeitler , Jan Aarts

We use density functional theory calculations to show that the LaAlO3|SrTiO3 interface between insulating perovskite oxides is borderline in satisfying the Stoner criterion for itinerant ferromagnetism and explore other oxide combinations…

材料科学 · 物理学 2014-09-17 Nirmal Ganguli , Paul J. Kelly

We study plasmon modes of the two-dimensional electron gas residing at the interface of band insulators $\rm{LaAlO_3}$ and $\rm{SrTiO_3}$ (LAO/STO) and the plasmon excitations of graphene-LAO/STO double layer as well. Considering the…

介观与纳米尺度物理 · 物理学 2017-04-20 Azadeh Faridi , Reza Asgari

In this paper we study LaAlO$_3$/Eu$_{1-x}$La$_x$TiO$_3$/SrTiO$_3$ structures with nominally x = 0, 0.1 and different thicknesses of the Eu$_{1-x}$La$_x$TiO$_3$ layer. We observe that both systems have many properties similar to previously…

强关联电子 · 物理学 2021-09-03 N. Lebedev , Y. Huang , A. Rana , D. Jannis , N. Gauquelin , J. Verbeeck , J. Aarts

After almost twenty years of intense work on the celebrated LaAlO3/SrTiO3 system, the recent discovery of a superconducting two-dimensional electron gases (2-DEG) in (111)-oriented KTaO3-based heterostructures injects new momentum to the…

超导电性 · 物理学 2022-08-24 S. Mallik , G. Ménard , G. Saïz , H. Witt , J. Lesueur , A. Gloter , L. Benfatto , M. Bibes , N. Bergeal

Superconductivity develops in bulk doped SrTiO$_3$ and at the LaAlO$_3$/SrTiO$_3$ interface with a dome-shaped density dependence of the critical temperature $T_c$, despite different dimensionalities and geometries. We propose that the…

超导电性 · 物理学 2017-09-22 D. Valentinis , S. Gariglio , A. Fête , J. -M. Triscone , C. Berthod , D. van der Marel

The rich phase diagram of the two dimensional electron gas (2DEG) at the \STO/\LAO interface is probed using Hall and longitudinal resistivity. Thanks to a special bridge design we are able to tune through the superconducting transition…

超导电性 · 物理学 2014-02-20 M. Ben Shalom , I. Neder , A. Palevski , Y. Dagan

Metallic LaAlO$_3$/SrTiO$_3$ (LAO/STO) interfaces attract enormous attention, but the relationship between the electron mobility and the sheet electron density, $n_s$, is poorly understood. Here we derive a simple expression for the…

材料科学 · 物理学 2017-09-05 F. Trier , K. V. Reich , D. V. Christensen , Y. Zhang , H. L. Tuller , Y. Z. Chen , B. I. Shklovskii , N. Pryds

Recent reports of superconductivity at KTaO3 (KTO) (110) and (111) interfaces have sparked intense interest due to the relatively high critical temperature as well as other properties that distinguish this system from the more extensively…

介观与纳米尺度物理 · 物理学 2022-10-26 Muqing Yu , Changjiang Liu , Dengyu Yang , Xi Yan , Qianheng Du , Dillon D. Fong , Anand Bhattacharya , Patrick Irvin , Jeremy Levy

Ferromagnetism and superconductivity are in most cases adverse. However, recent experiments reveal that they coexist at interfaces of LaAlO3 and SrTiO3. We analyze the magnetic state within density functional theory and provide evidence…

强关联电子 · 物理学 2012-01-20 N. Pavlenko , T. Kopp , E. Y. Tsymbal , G. A. Sawatzky , J. Mannhart

We build a theoretical model for the electronic properties of the two-dimensional (2D) electron gas that forms at the interface between insulating SrTiO$_3$ and a number of polar cap layers, including LaTiO$_3$, LaAlO$_3$, and GdTiO$_3$.…

强关联电子 · 物理学 2017-02-13 Amany Raslan , Patrick Lafleur , W. A. Atkinson

We measure the gate voltage ($V_g$) dependence of the superconducting properties and the spin-orbit interaction in the (111)-oriented LaAlO$_3$/SrTiO$_3$ interface. Superconductivity is observed in a dome-shaped region in the carrier…

超导电性 · 物理学 2017-12-06 P. K. Rout , E. Maniv , Y. Dagan

We formulate a model for magnetic and superconducting ordering at LaAlO3/SrTiO3 interfaces containing both localized magnetic moments and itinerant electrons. Though these both originate in Ti 3d orbitals, the former may be due to electrons…

强关联电子 · 物理学 2013-02-05 Lukasz Fidkowski , Hong-Chen Jiang , Roman M. Lutchyn , Chetan Nayak

Magnetoresistance (MR) anisotropy in LaAlO3/SrTiO3 (LAO/STO) interfaces is compared between samples prepared in high oxygen partial pressure (PO2) of 10-4 mbar exhibiting quasi-two-dimensional (quasi-2D) electron gas and low PO2 of 10-6…

强关联电子 · 物理学 2011-10-25 X. Wang , W. M Lü , A. Annadi , Z. Q. Liu , S. Dhar , T. Venkatesan , Ariando

The two-dimensional electron gas (2DEG) at the interface between LaAlO$_3$ (LAO) and SrTiO$_3$ (STO) has become one of the most fascinating and highly-debated oxide systems of recent times. Here we propose that a one-dimensional electron…

介观与纳米尺度物理 · 物理学 2015-06-03 N. C. Bristowe , T. Fix , M. G. Blamire , P. B. Littlewood , Emilio Artacho

In this work, we investigate the structural, magnetic, and microwave magnetic dynamics of multilayered \([{\rm LSMO}/{\rm SRO}]_n\) heterostructures \((n = 1 \text{ and } 5)\) grown on SrTiO\(_3\) (001) substrates. X-ray diffraction…