Competition between magnetic order and charge localization in Na2IrO3 thin crystal devices thin crystal devices

Rodriguez, Josue; Lopez, Gilbert; Ramirez, Francisco; Breznay, Nicholas P.; Kealhofer, Robert; Nagarajan, Vikram; Latzke, Drew; Wilson, Samantha; Marrufo, Naomy; Santiago, Peter; Lara, Jared; Diego, Amirari; Molina, Everardo; Rosser, David; Tavassol, Hadi; Lanzara, Alessandra; Analytis, James G.; Ojeda-Aristizabal, Claudia

doi:10.1103/physrevb.101.235415

Title: Competition between magnetic order and charge localization in Na₂IrO₃ thin crystal devices thin crystal devices

Abstract

Spin orbit assisted Mott insulators such as sodium iridate (Na₂IrO₃) have been an important subject of study in recent years. In these materials, the interplay of electronic correlations, spin-orbit coupling, crystal field effects, and a honeycomb arrangement of ions bring exciting ground states, predicted in the frame of the Kitaev model. The insulating character of Na₂IrO₃ has hampered its integration to an electronic device, desirable for applications, such as the manipulation of quasiparticles interesting for topological quantum computing. Here we show through electronic transport measurements supported by angle-resolved photoemission spectroscopy (ARPES) experiments, that electronic transport in Na₂IrO₃ is ruled by variable range hopping and it is strongly dependent on the magnetic ordering transition known for bulk Na₂IrO₃, as well as on external electric fields. Furthermore, electronic transport measurements allow us to deduce a value for the localization length and the density of states in our Na₂IrO₃ thin crystal devices, and offer an alternative approach to study insulating 2D-materials.

Authors:

^[1]; Lopez, Gilbert ^[2];

^[1]; Breznay, Nicholas P. ^[3]; Kealhofer, Robert ^[2]; Nagarajan, Vikram ^[2]; Latzke, Drew ^[2]; Wilson, Samantha ^[1];

^[1]; Santiago, Peter ^[1]; Lara, Jared ^[1]; Diego, Amirari ^[1]; Molina, Everardo ^[1]; Rosser, David ^[1];

^[1]; Lanzara, Alessandra ^[2]; Analytis, James G. ^[2];

^[1]

California State Univ. (CalState), Long Beach, CA (United States)
Univ. of California, Berkeley, CA (United States)
Harvey Mudd College, Claremont, CA (United States)

Publication Date:: Mon Jun 08 00:00:00 EDT 2020

Research Org.:: California State Univ. (CalState), Long Beach, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Institutes of Health (NIH)

OSTI Identifier:: 1782486

Alternate Identifier(s):: OSTI ID: 1676377

Grant/Contract Number:: AC02-05CH11231; SC0018154; DGE 1752814; UL1GM118979; TL4GM118980; RL5GM118978; T34GM008074

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 101; Journal Issue: 23; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Density of states; electrical conductivity; electronic structure; localization; transport phenomena; devices; Mott insulators; strongly correlated systems; angle-resolved photoemission spectroscopy; atomic force microscopy; crystal growth; photoemission spectroscopy; resistivity measurements; scanning electron microscopy; transport techniques

Citation Formats


                    Rodriguez, Josue, Lopez, Gilbert, Ramirez, Francisco, Breznay, Nicholas P., Kealhofer, Robert, Nagarajan, Vikram, Latzke, Drew, Wilson, Samantha, Marrufo, Naomy, Santiago, Peter, Lara, Jared, Diego, Amirari, Molina, Everardo, Rosser, David, Tavassol, Hadi, Lanzara, Alessandra, Analytis, James G., and Ojeda-Aristizabal, Claudia. Competition between magnetic order and charge localization in Na2IrO3 thin crystal devices thin crystal devices.  United States: N. p., 2020. 
Web.  doi:10.1103/physrevb.101.235415.

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                    Rodriguez, Josue, Lopez, Gilbert, Ramirez, Francisco, Breznay, Nicholas P., Kealhofer, Robert, Nagarajan, Vikram, Latzke, Drew, Wilson, Samantha, Marrufo, Naomy, Santiago, Peter, Lara, Jared, Diego, Amirari, Molina, Everardo, Rosser, David, Tavassol, Hadi, Lanzara, Alessandra, Analytis, James G., & Ojeda-Aristizabal, Claudia. Competition between magnetic order and charge localization in Na2IrO3 thin crystal devices thin crystal devices.  United States.  https://doi.org/10.1103/physrevb.101.235415

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                    Rodriguez, Josue, Lopez, Gilbert, Ramirez, Francisco, Breznay, Nicholas P., Kealhofer, Robert, Nagarajan, Vikram, Latzke, Drew, Wilson, Samantha, Marrufo, Naomy, Santiago, Peter, Lara, Jared, Diego, Amirari, Molina, Everardo, Rosser, David, Tavassol, Hadi, Lanzara, Alessandra, Analytis, James G., and Ojeda-Aristizabal, Claudia. Mon .  
"Competition between magnetic order and charge localization in Na2IrO3 thin crystal devices thin crystal devices".  United States.  https://doi.org/10.1103/physrevb.101.235415.  https://www.osti.gov/servlets/purl/1782486.

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@article{osti_1782486,

  title        = {Competition between magnetic order and charge localization in Na2IrO3 thin crystal devices thin crystal devices},

  author       = {Rodriguez, Josue and Lopez, Gilbert and Ramirez, Francisco and Breznay, Nicholas P. and Kealhofer, Robert and Nagarajan, Vikram and Latzke, Drew and Wilson, Samantha and Marrufo, Naomy and Santiago, Peter and Lara, Jared and Diego, Amirari and Molina, Everardo and Rosser, David and Tavassol, Hadi and Lanzara, Alessandra and Analytis, James G. and Ojeda-Aristizabal, Claudia},

  abstractNote = {Spin orbit assisted Mott insulators such as sodium iridate (Na2IrO3) have been an important subject of study in recent years. In these materials, the interplay of electronic correlations, spin-orbit coupling, crystal field effects, and a honeycomb arrangement of ions bring exciting ground states, predicted in the frame of the Kitaev model. The insulating character of Na2IrO3 has hampered its integration to an electronic device, desirable for applications, such as the manipulation of quasiparticles interesting for topological quantum computing. Here we show through electronic transport measurements supported by angle-resolved photoemission spectroscopy (ARPES) experiments, that electronic transport in Na2IrO3 is ruled by variable range hopping and it is strongly dependent on the magnetic ordering transition known for bulk Na2IrO3, as well as on external electric fields. Furthermore, electronic transport measurements allow us to deduce a value for the localization length and the density of states in our Na2IrO3 thin crystal devices, and offer an alternative approach to study insulating 2D-materials.},

  doi          = {10.1103/physrevb.101.235415},

  journal      = {Physical Review B},

  number       = 23,

  volume       = 101,

  place        = {United States},

  year         = {Mon Jun 08 00:00:00 EDT 2020},

  month        = {Mon Jun 08 00:00:00 EDT 2020}

}

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Works referenced in this record:

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Title: Competition between magnetic order and charge localization in Na2IrO3 thin crystal devices thin crystal devices

Abstract

Citation Formats

Mixing between J eff = 1 2 and 3 2 orbitals in Na 2 IrO 3 : A spectroscopic and density functional calculation study journal, August 2013

Anyons in an exactly solved model and beyond journal, January 2006

Magnetic anisotropy of the alkali iridate Na 2 IrO 3 at high magnetic fields: Evidence for strong ferromagnetic Kitaev correlations journal, February 2019

Bond ordering and phase transitions in Na 2 IrO 3 under high pressure journal, September 2018

Na 2 IrO 3 as a Novel Relativistic Mott Insulator with a 340-meV Gap journal, December 2012

Models and materials for generalized Kitaev magnetism journal, November 2017

Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid journal, July 2018

Relevance of the Heisenberg-Kitaev Model for the Honeycomb Lattice Iridates A 2 IrO 3 journal, March 2012

Conduction in non-crystalline materials: III. Localized states in a pseudogap and near extremities of conduction and valence bands journal, April 1969

Photoexcited states of the harmonic honeycomb iridate γ − Li 2 IrO 3 journal, September 2015

Observation of metallic surface states in the strongly correlated Kitaev-Heisenberg candidate Na 2 IrO 3 journal, June 2016

Coulomb gap and low temperature conductivity of disordered systems journal, February 1975

Electronic Properties of Doped Semiconductors book, January 1984

Effects of Double Exchange in Magnetic Crystals journal, April 1960

Honeycomb lattice Na 2 IrO 3 at high pressures: A robust spin-orbit Mott insulator journal, September 2018

Direct evidence of a zigzag spin-chain structure in the honeycomb lattice: A neutron and x-ray diffraction investigation of single-crystal Na 2 IrO 3 journal, May 2012

Antiferromagnetic Mott insulating state in single crystals of the honeycomb lattice material Na 2 IrO 3 journal, August 2010

Raman signatures of strong Kitaev exchange correlations in (Na 1−x Li x ) 2 IrO 3 : Experiments and theory journal, May 2016

Spin Dependent Hopping and Colossal Negative Magnetoresistance in Epitaxial Nd 0.52 Sr 0.48 MnO 3 Films in Fields up to 50 T journal, November 1998

Comment on “Spin Dependent Hopping and Colossal Negative Magnetoresistance in Epitaxial Nd 0.52 Sr 0.48 MnO 3 Films in Fields up to 50 T” journal, April 2000

Quasiparticles and charge transfer at the two surfaces of the honeycomb iridate Na 2 IrO 3 journal, October 2017

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Direct evidence for dominant bond-directional interactions in a honeycomb lattice iridate Na2IrO3 journal, May 2015

Long-range magnetic ordering in Na 2 IrO 3 journal, June 2011

Title: Competition between magnetic order and charge localization in Na₂IrO₃ thin crystal devices thin crystal devices

Mixing between $J_{eff} = \frac{1}{2}$ and $\frac{3}{2}$ orbitals in Na $_{2}$ IrO $_{3}$ : A spectroscopic and density functional calculation study
journal, August 2013

Anyons in an exactly solved model and beyond
journal, January 2006

Magnetic anisotropy of the alkali iridate ${Na}_{2} {IrO}_{3}$ at high magnetic fields: Evidence for strong ferromagnetic Kitaev correlations
journal, February 2019

Bond ordering and phase transitions in ${Na}_{2} {IrO}_{3}$ under high pressure
journal, September 2018

${Na}_{2} {IrO}_{3}$ as a Novel Relativistic Mott Insulator with a 340-meV Gap
journal, December 2012

Models and materials for generalized Kitaev magnetism
journal, November 2017

Majorana quantization and half-integer thermal quantum Hall effect in a Kitaev spin liquid
journal, July 2018

Relevance of the Heisenberg-Kitaev Model for the Honeycomb Lattice Iridates $A_{2} {IrO}_{3}$
journal, March 2012

Conduction in non-crystalline materials: III. Localized states in a pseudogap and near extremities of conduction and valence bands
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Photoexcited states of the harmonic honeycomb iridate $γ - {Li}_{2} {IrO}_{3}$
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Observation of metallic surface states in the strongly correlated Kitaev-Heisenberg candidate ${Na}_{2} {IrO}_{3}$
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Honeycomb lattice ${Na}_{2} {IrO}_{3}$ at high pressures: A robust spin-orbit Mott insulator
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Direct evidence of a zigzag spin-chain structure in the honeycomb lattice: A neutron and x-ray diffraction investigation of single-crystal Na $_{2}$ IrO $_{3}$
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