柳学榕

  主要关注电子关联体系里晶格、自旋、电荷以及轨道有序和相变，并利用多种X射线散射手段研究这些行为背后的微观机制。近几年开始探索X射线散射和时间分辨技术相结合，开展电子关联体系非热平衡演化方面的研究，并负责上海SCLF项目时间分辨共振非弹性散射线站的设计和建设。

本组主要的研究和发展方向为：

一，利用共振X射线技术研究电子关联体系中的自旋、电荷和轨道有序相变，并通过相关的动力学激发谱测量探索有序相变的微观机制
二，利用X射线结构分析技术，解析外延生长薄膜和异质结的精确结构变化，分析注入、掺杂以及其它调控情况下的晶体结构演化
三，发展飞秒时间尺度的超快X射线测量技术

我们长期欢迎对应用X射线相关技术研究电子关联体系和功能材料结构有兴趣的博士后和助理研究员加入！有意者可邮件和课题组长联系。

2022年 

1*. Antiferromagnetic excitonic insulator state in Sr3Ir2O7, Nat Commun 13, 913 (2022)

2.Nonthermal breaking of magnetic order via photogenerated spin defects in the spin-orbit coupled insulator Sr3Ir2O7, Phys. Rev. B 105, 064409 (2022)

2021年 

1*. Single-laser-pulse-driven thermal limit of the quasi-two-dimentional magnetic ordering in Sr2IrO4, Phys. Rev. X. 11,041023 (2021)

2*. Laser-induced transient magnons in Sr3Ir2O7 throughout the Brillouin zone, PNAS, 118, e2103696118(2021)

3. X-ray absorption investigation of the site occupancies of the copper element in nominal Cu₃Zn(OH)₆FBr, CPB, 30(4):046102 (2021)

4. Unraveling the Orbital Physics in a Canonical Orbital System KCuF3, Phys. Rev. Lett. 126, 106401(2021)

5*. Strong Superexchange in a d9−δ Nickelate Revealed by Resonant Inelastic X-Ray Scattering, Phys. Rev. Lett. 126, 087001(2021)

2020年 

1*. Strongly correlated charge density wave in La2-xSrxCuO4 evidenced by doping-dependent phonon anomaly, Phys. Rev. Lett. 124, 207005(2020)

2*. Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La2-xCexCuO4, npj Quantum Materials, 5, 4 (2020)

2019年 

1. Phononic Helical Nodal Lines with PT Protection in MoB2, Phys. Rev. Lett. 123, 245302 (2019)

2. Epitaxial growth and antiferromagnetism of Sn-substituted perovskite iridate SrIr0.8Sn0.2O3, Phys. Rev. Mat. 3, 124411 (2019)

3. Optical study on the possible Slater insulator SrIr0.8Sn0.2O3, Phys. Rev. B 100, 045101 (2019)

4*. Recovery of photoexcited magnetic ordering in Sr2IrO4, J. Phys.: Condens. Matter 31 255801 （2019）

5*. Direct Detection of Dimer Orbitals in Ba5AlIr2O11, Phys. Rev. Lett. 122, 106401 (2019)

6. Magnetism in iridate heterostructures leveraged by structural distortions, Scientific Reports 9:4263 (2019)

2018年 

l. Utrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective, Invited review for the Philosophical Transactions of the Royal Society A DOI: 10.1098/rsta.2017.0480 (2019)

2*. Quantitative Characterization of the Nanoscale Local Lattice Strain Induced by Sr Dopants in La1.92Sr0.08CuO4, Phys. Rev. Lett. 120, 197001 (2018)

2017年 

1. On the possibility to detect multipolar order in URu2Si2 by the electric quadrupolar transition of resonant elastic x-ray scattering, Phys. Rev. B 96, 085146 (2017)

2. Doping Dependence of Collective Spin and Orbital Excitations in the Spin-1 Quantum Antiferromagnet La2−xSrxNiO4 Observed by X-Rays, Phys. Rev. Lett. 118, 156402 (2017)

3*. Giant spin gap and magnon localization in the disordered Heisenberg antiferromagnet Sr2Ir1−xRuxO4, Phys. Rev. B 95, 121103(R) (2017)

2016年 

1*. Anisotropic softening of magnetic excitations in lightly electron-doped Sr2IrO4, Phys. Rev. B 93, 241102(R) (2016)

2*. Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4, Nature Materials 15, 601 (2016)

3. Spin-orbit-driven magnetic structure and excitation in the 5d pyrochlore Cd2Os2O7, Nature communications, 7, 11651 (2016)

2015年

1. Probing single magnon excitations in Sr2IrO4 using O K-edge resonant inelastic x-ray scattering, Journal of Physics-Condensed Matter, 20, 202202 (2015)

2014年 

1. Momentum dependence in K-edge resonant inelastic x-ray scattering and its application to screening dynamics in CE-phase La0.5Sr1.5MnO4, Phys. Rev. B 90, 045111 (2014)

2. Asymmetric melting and freezing kinetics of the magnetostructural phase transition in B2-ordered FeRh epilayers, Appl. Phys. Lett. 104, 232407 (2014)

2013年 

1. Low temperature crystal structure and large lattice discontinuity at Tc in superconducting FeTeOx films, Appl. Phys. Lett. 103, 102604 (2013)

2*. Ferromagnetic Exchange Anisotropy from Antiferromagnetic Superexchange in the Mixed 3d-5d Transition-Metal Compound Sr3CuIrO6, Phys. Rev. Lett. 111, 057202 (2013)

3. Persistence of magnetic excitations in La2−xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal, Nature Materials, 10.1038/nmat3723 (2013)

4. Avoided quantum criticality and magnetoelastic coupling in BaFe2-xNixAs2, Phys. Rev. Lett. 110, 257001 (2013)

5. Strongly momentum-dependent screening dynamics in La0.5Sr1.5MnO4 observed with resonant inelastic x-ray scattering, Phys. Rev. B (R) 87, 201103 (2013) 

6. High-Energy Magnetic Excitations in the Cuprate Superconductor Bi2Sr2CaCu2O8+δ: Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom, Phys. Rev. Lett. 110, 147001 (2013)

7. Crystal-field splitting and correlation effect on the electronic structure of A2IrO3, Phys. Rev. Lett. 110, 076402 (2013)

2012年 

1*. Testing the validity of the strong spin-orbit-coupling limit for octahedrally coordinated iridate compounds in a model system Sr3CuIrO6, Phys. Rev. Lett. 109, 157401 (2012)

2. Temperature-dependent transformation of the magnetic excitation spectrum on approaching superconductivity in Fe1+y-x(Ni/Cu)xTe0.5Se0.5, Phys. Rev. Lett. 109, 227002 (2012)

3. Resonant inelastic x-ray scattering study of charge excitations in superconducting and nonsuperconducting PrFeAsO1−y, Phys. Rev. B 86, 115104 (2012)

4. Tailoring the FeRh Magnetostructural Response with Au Diffusion, J. Appl. Phys. 112, 043512 (2012)

5. Magnetically polarized Ir dopant atoms in superconducting Ba(Fe1-xIrx)2As2, Phys. Rev. B 85, 140514 (2012)

6. Surface melting of electronic order in La0.5Sr1.5MnO4, Phys. Rev. B 84, 165103 (2011) (Editors suggestion)

2011年 

1*. Long range magnetic ordering in Na2IrO3, Phys. Rev. B (R) 83, 220403 (2011)

2*. X-ray diffuse scattering study of Local lattice distortions in Fe1+xTe induced by excess Fe, Phys. Rev. B 83, 184523 (2011)

2010年前 

1*. Fermi-surface-induced lattice modulation and charge-density wave in optimally doped YBa2Cu3O7-x, Phys. Rev. B 78, 134526 (2008)

2. Evidence of modified ferromagnetism at a buried Permalloy/CoO interface at room temperature, Phys. Rev. B 75, 014442 (2007)

3. Two- and three-dimensional incommensurate modulation in optimally-doped Bi2Sr2CaCu2O8+, Phys. Rev. B 73, 174505 (2006)

4. High-resolution polarization analysis study of long-range magnetic order in cuprates, Phys. Rev. B 71, 212506 (2005)

5*. Four-Unit-Cell Superstructure in the Optimally Doped YBa2Cu3O6.92 Superconductor, Phys. Rev. Lett. 93, 157008 (2004)

6. The theoretical calibration coefficient in the measurement of nonlinear dielectric constant with a scanning tip microwave near-field theory, Acta Physica Sinica, 53, 34 (2003)

著作 

Inhomogeneous Lattice modulations and Fermi-Surface Effects in Yttrium Barium Copper Oxide Superconductors, Z. Islam, X. Liu, S. K. Sinha and S. C. Moss

Book chapter in Diffuse Scattering and the Fundamental Properties of Materials.

Editors: R. I. Barabash, G. E. Ice and P. E. A. Turchi, Momentum Press, New Jersey (2009)