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Symmetry-lowering structural phase transitions result in multiple degenerate structures whose coexistence is determined by macroscopic strain compatibility. In quantum materials, these structural transformations often couple to electronic…

The interlayer exchange coupling in Fe/MgO(001) superlattices is found to increase exponentially with decreasing temperature. Around 150~K, the field induced response changes from discrete switching, governed by field-driven domain…

Electric control of magnetism is a vision which drives intense research on magnetic semiconductors and multiferroics. Recently, also ultrathin metallic films were reported to show magnetoelectric effects at room temperature. Here we…

Moir\'e materials, with superlattice periodicity many times the atomic length scale, have enabled the studies of strong electronic correlations and band topology with unprecedented tunability. However, nonvolatile control of the moir\'e…

Mesoscale and Nanoscale Physics · Physics 2022-09-15 Kaifei Kang , Wenjin Zhao , Yihang Zeng , Kenji Watanabe , Takashi Taniguchi , Jie Shan , Kin Fai Mak

Multi-component chalcogenides, such as quasi-binary GeTe-Sb$_{2}$Te$_{3}$ alloys, are widely used in optical data storage media in the form of rewritable optical discs. Ge$_{2}$Sb$_{2}$Te$_{5}$ (GST) in particular has proven to be one of…

Materials Science · Physics 2015-09-29 Muneaki Hase , Paul Fons , Kirill Mitrofanov , Alexander V. Kolobov , Junji Tominaga

We examine the enhancement of the interfacial superconductivity between LaAlO$_{3}$ and SrTiO$_{3}$ by an effective electric field. Through the breaking of inversion symmetry at the interface, we show that a term coupling the superfluid…

Superconductivity · Physics 2015-06-03 Jason T. Haraldsen , Peter Wölfle , Alexander V. Balatsky

The influence of an external static magnetic field (up to 480 mT)on the structural properties of EuTiO$_3$ (ETO) polycrystalline samples was examined by powder XRD at the Elettra synchrotron facilities in the temperature range 100-300K.…

Materials Science · Physics 2021-12-15 P. Pappas , M. Calamiotou , M. Polentarutti , G Bais , A. Bussmann-Holder , E. Liarokapis

Electrical control of magnetism is a long-standing goal in physics and technology, recently developed electrolyte gating techniques providing a promising route to realization. Validating a recent theoretical prediction, here we demonstrate…

Strongly Correlated Electrons · Physics 2018-12-05 Jeff Walter , T. Charlton , H. Ambaye , M. R. Fitzsimmons , Peter P. Orth , R. M. Fernandes , Chris Leighton

Superlattices built from two antiferromagnetic (AFM) charge/orbital order compounds, $Pr_{0.5}Ca_{0.5}MnO_3$ and $La_{0.5}Ca_{0.5}MnO_3$, have been studied as the thickness of $La_{0.5}Ca_{0.5}MnO_3$ ($LCMO$) varied. High structural quality…

Strongly Correlated Electrons · Physics 2009-11-11 P. Padhan , W. Prellier

A 2D electron gas system in an oxide heterostructure serves as an important playground for novel phenomena. Here, we show that, by using fractional delta-doping to control the interface's composition in LaxSr1-xTiO3/SrTiO3 artificial oxide…

Strongly Correlated Electrons · Physics 2012-09-28 Woo Seok Choi , Suyoun Lee , Valentino R. Cooper , Ho Nyung Lee

Transition metal oxides hold great potential for the development of new device paradigms because of the field-tunable functionalities driven by their strong electronic correlations, combined with their earth abundance and environmental…

Coupled transitions between distinct ordered phases are important aspects behind the rich phase complexity of correlated oxides that hinders our understanding of the underlying phenomena. For this reason, fundamental control over complex…

Strongly Correlated Electrons · Physics 2018-04-12 S. Middey , D. Meyers , M. Kareev , Y. Cao , X. Liu , P. Shafer , J. W. Freeland , J. W. Kim , P. J. Ryan , J. Chakhalian

Light-manipulation of correlated electronic phases in solids offers the tantalizing prospect of realizing electronic devices operating at the ultrafast time-scale. In this context, the experimental realization of non-equilibrium transitions…

Strongly Correlated Electrons · Physics 2021-04-09 Francesco Grandi , Martin Eckstein

The modulation of channel conductance in field-effect transistors (FETs) via metal-oxide-semiconductor (MOS) structures has revolutionized information processing and storage. However, the limitations of silicon-based FETs in electrical…

Ruthenium-based perovskite systems are attractive because their Structural, electronic and magnetic properties can be systematically engineered. SrRuO$_3$/SrTiO$_3$ superlattice, with its period consisting of one unit cell each, is very…

Strongly Correlated Electrons · Physics 2012-10-15 Mingqiang Gu , Qiyun Xie , Xuan Shen , Rubin Xie , Jianli Wang , Gang Tang , Di Wu , G. P. Zhang , X. S. Wu

Topological aspects in altermagnets have come into focus recently, and tuning the antiferromagnetic (AFM) state into an altermagnetic phase remains an active frontier. We realize both within a rutile superlattice here in this paper. With…

Materials Science · Physics 2025-09-29 Wanfei Shan , Qun Yang , Prineha Narang

Multiferroic materials have undergone extensive research in the past two decades in an effort to produce a sizable room-temperature magneto-electric (ME) effect in either exclusive or composite materials for use in a variety of electronic…

Recent experimental advances in atomically thin transition metal dichalcogenide (TMD) metals have unveiled a range of interesting phenomena including the coexistence of charge-density-wave (CDW) order and superconductivity down to the…

Superconductivity · Physics 2016-08-31 Xiaoxiang Xi , Helmuth Berger , László Forró , Jie Shan , Kin Fai Mak

Moir\'e superlattices formed from transition metal dichalcogenides (TMDs) have been shown to support a variety of quantum electronic phases that are highly tunable using applied electromagnetic fields. While the valley character of the…

How to control collectively ordered electronic states is a core interest of condensed matter physics. We report an electric field controlled reversible transition from superconductor to ferromagnetic insulator in (Li,Fe)OHFeSe thin flake…

Superconductivity · Physics 2018-08-21 L. K. Ma , B. Lei , N. Z. Wang , K. S. Yang , D. Y. Liu , F. B. Meng , C. Shang , Z. L. Sun , J. H. Cui , C. S. Zhu , T. Wu , Z. Sun , L. J. Zou , X. H. Chen