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Overview of Current Example Experiments

Travis Williams

Oak Ridge National Laboratory

2 Overview of Current Example Experiments

Overview

• Quantum Magnetism

• Superconductivity

• Topological Materials

• Thin Films & Nanostructures

3 Overview of Current Example Experiments

Quantum Magnetism

• Complex incommensurate structures in multiferroics

Kimura et al. JPSJ 75 (2006) 113701

4 Overview of Current Example Experiments

Quantum Magnetism

• New magnetic phenomena driven by spin-orbit interaction.

Bannejee et al. arXiv/cond-mat:1609.00103

Coldea et al. PRL. 88 (2002) 137203

5 Overview of Current Example Experiments

Quantum Magnetism

• Magnetization distribution in organic molecules

Lach et al. Adv. Funct. Mater. 22 (2012) 989

6 Overview of Current Example Experiments

Quantum Magnetism

• Small single crystals produced by high pressure synthesis; eg. S = ½ Kagome staircase β-Cu3V2O8.

Rogado et al. J. Phys.: Condens. Matter 15 (2003) 907

Lawes et al. PRL 93 (2004) 247201

7 Overview of Current Example Experiments

Quantum Magnetism

• Materials under high pressure, eg. Iron.

Takeda and Mito. JPSJ 71 (2002) 729 Shimizu et al. Nature 412 (2001) 316

8 Overview of Current Example Experiments

Quantum Magnetism

• Itineracy in heavy fermion systems.Correa et al. PRL. 109 (2012) 246405

Wiebe et al. Nat. Phys. 3 (2007) 96

Stockert et al. JPSJ. 81 (2012) 011001

9 Overview of Current Example Experiments

Superconductivity

• Organic superconductors

Guterding et al. PRL. 116 (2016) 237001

Milbradt et al. PRB. 88 (2013) 064501

10 Overview of Current Example Experiments

Superconductivity

• New regimes of high temperature superconductors.

Tranquada. AIP Conf. Proc. 1550 (2013) 114 Grissonnanche et al. Nat. Comm. 5 (2014) 3280

Badoux et al. Nature. 210 (2016) 531

11 Overview of Current Example Experiments

Topological Materials

• Topologically protected spin textures.

Heinze et al. Nat. Phys. 7 (2011) 713

Romming et al. Science. 341 (2013) 636

12 Overview of Current Example Experiments

Topological Materials

• High-pressure metal-insulator transition in SmB6 (CHESS)

Fuhrman et al. PRL. 114 (2015) 036401

13 Overview of Current Example Experiments

Topological Materials

• Exposing relativistic fermions with 4D polarized tomography

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ky

Xu et al. Science 349 (2015) 613

14 Overview of Current Example Experiments

Thin Films & Nanostructures

• Epitaxially grown single crystals with tailored electronic, optical, or magnetic properties.

Jiang et al. ACS 48 (2015) 144 Nayak et al. Nat. Mat. 14 (2015) 679

15 Overview of Current Example Experiments

Thin Films & Nanostructures

• Topological Insulator-Ferromagnetic Insulator heterostructures.

Mahfouzi et al. PRB. 82 (2010) 195440

Luo and Qi. PRB 87 (2013) 085431

16 Overview of Current Example Experiments

Thin Films & Nanostructures

• In situ studies of kinetics and relaxation processes

Emori et al. Nat. Mat. 12 (2013) 611

Kläui. JPCM 20 (2008) 313001

17 Overview of Current Example Experiments

Thin Films & Nanostructures

• Fractional topological insulators

Hasan and Kane. Rev. Mod. Phys. 82 (2010) 3045

18 Overview of Current Example Experiments

Thin Films & Nanostructures

• Magnetic tunnel junctions.

Yuasa et al. Nat. Mat. 3 (2004) 868

19 Overview of Current Example Experiments

Template for Early Experiments

• Each ‘first experiment’ should be 1-2 pg long.

• Aiming for stretch experiments:

– Potentially large impact

– Cannot do at all currently or would take a prohibitively large amount of beamtime.

20 Overview of Current Example Experiments

Template for Early Experiments

• Sections:

– Introduction to the Scientific Problem

– First Experiment Details

– Justification for performing the experiment at the STS

21 Overview of Current Example Experiments

Template for Early Experiments

• Sections:

– Introduction to the Scientific Problem

• Motivate the experiment. This should be aimed at a similar audience to the beamtime proposals; field-specific knowledge can be assumed.

– First Experiment Details

• Describe the specific experiment and how it will aim to answer the problem described above.

• Specific details where appropriate: length- or energy-scales, field or pressure ranges, etc.

22 Overview of Current Example Experiments

Template for Early Experiments

• Sections:

– Justification for performing the experiment at the STS

• Why it is best suited to being there as opposed to FTS, HFIR or other source

• We should tie back to the central capabilities enabled by STS: high brightness beams of cold neutrons, as well as any relevant and critical enabling technologies: high-performance computing, neutron optics, detector technologies, sample environment, etc.

• The specific instrument instrument(s) or instrument suite needed to enable the work should be discussed