柳学榕

时间:2018-03-01浏览:13636设置

  柳学榕课题组介绍


课题组长
柳学榕,正教授,研究员
通讯地址:
电子邮件:liuxr@shanghaitech.edu.cn
2001年在中国科学技术大学物理系获学士学位,2008年于美国加州大学圣地亚哥分校(UCSD)物理系获博士学位。2009年至2013年在美国布鲁克海文国家实验室(BNL)先后任博士后研究助理和访问学者。2013年至2018年在中国科学院物理研究所任特聘研究员(博士生导师)。2018年加入上海科技大学物质科学与技术学院,2021年加入上海科技大学大科学中心,现任正教授(Tenured,博士生导师)。

研究介绍

  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。



招聘信息

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。



新闻

2022.01.11 我组和国际合作组的合作工作“Antiferromagnetic Excitonic Insulator State in Sr3Ir2O7”被Nature Communications接收。


2021.11.05 我组和国际合作组的单发激光激励自旋有序演化的实验工作在PRX上发表。

2021.09.10 高精度X射线多功能开放实验平台优化基本完成。

     石英管封装粉末衍射图(30秒/帧)

2021.09.03 祝贺王瑞塘的工作“Single-Laser-Pulse-Driven Thermal Limit of the Quasi-Two-Dimensional Magnetic Ordering in Sr2IrO4”被PRX接收。

2021.06.04 自主搭建的高精度X射线多功能开放实验平台完成了精度调节和安全防护检测!

             

全自主设计 + 硬件70%以上国产

2021.05.28 我组和美国合作组的时间分辨超快RIXS实验工作在PNAS上发表。

2021.04.13 祝贺王瑞塘的工作“ X-ray absorption investigation of the site occupancies of the copper element in nominal Cu3Zn(OH)6FBr”被选为CPB亮点文章。

2021.01.21.   祝贺李杰明作为第一作者的工作“Unravelling the orbital physics in a canonical orbital system KCuF3”被PRL接收。

2021.01.15.   祝贺林佳琪作为第一作者的工作“Strong superexchange in a  d9−δ nickelate revealed by resonant inelastic x-ray scattering”被PRL接收。

2020.11.08. “深圳中能高重频自由电子激光量子材料线站用户专题研讨会”在深圳召开,为时间分辨X射线谱学的广阔美好前景再添重重一笔。

2020.10.23. 和上海光源新建表面散射实验站负责人李晓龙组商定外延薄膜结构分析合作事宜。

2020.09.01. 欢迎新研究生李翔、李哲通入组。



实验技术和设备


X射线实验技术:

非共振弹性散射(NRXS)

1. 外延薄膜晶体结构解析

2. 缺陷、掺杂相关的局域微应力解析

共振弹性散射(RXS)

1. 自旋有序结构解

2. 电荷有序结构解析

3. 轨道有序结构解析

共振非弹性散射(RIXS)

1. 自旋激发      2. 电荷激发     3. 晶格振动激发

时间分辨X射线散射百飞秒级超快领域中充满想象的未来!

实验设备:

国际先进的X射线大科学装置:

通过聚焦基础科研前沿的实验建议书(proposal),在开放实验平台上和国际同行竞争,申请宝贵的X射线大科学装置实验机时。

美国阿贡国家实验室先进光源美国斯坦福直线加速自由电子激光美国布鲁克海文国家实验室国家光源II

法国欧洲同步辐射中心英国钻石光源日本spring-8

瑞士光源中国上海光源建设中的上海硬线自由电子激光


实验室设备:

以最先进Excillum公司的METALJET-D2验室级别X射线源(世界上目前最高亮度的镓铟液态金属靶源)为核心,自主搭建高精度射线多功能开放实验平台,以实现对功能材料在多维度环境调节的工况下的结构演化测量。




发表文章


*(共同)第一或(共同)通讯作者

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 SuperconductorsZ. 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) 





课题组成员

李效亭                  

  博士研究生,本科毕业于青岛大学

  

邮箱: lixt2@shanghaitech.edu.cn             

尹帅帅                  

  硕士研究生,本科毕业于西安理工大学

  

邮箱:yinshsh@shanghaitech.edu.cn              

李翔                  

  硕士研究生,本科毕业于合肥工业大学

  

邮箱:lixiang@shanghaitech.edu.cn              

李哲通                  

  硕士研究生

  

邮箱:lizht@shanghaitech.edu.cn              


原课题组成员

李杰民                  

      博士研究生毕业,去往美国布鲁克海文国家实验室国家光源II任博士后

邮箱:  


林佳琪                  

  博士研究生毕业,去往西湖大学任博士后

 

邮箱: jqlin@iphy.ac.cn             

王瑞塘                  

  博士研究生毕业,去往半导体工业界

  

邮箱: wangrt@iphy.ac.cn             





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