Local electric property modification of ferroelectric tunnel junctions induced by variation of polarization charge screening conditions under measurement with scanning probe techniques

Standard

Local electric property modification of ferroelectric tunnel junctions induced by variation of polarization charge screening conditions under measurement with scanning probe techniques. / Andreeva, Natalia; Petukhov, Anatoliy; Vilkov, Oleg; Petraru, Adrian; Luchinin, Victor.

In: Nanomaterials, Vol. 11, No. 12, 3323, 07.12.2021.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{031ec43f9cb743188450a017d5956391,

title = "Local electric property modification of ferroelectric tunnel junctions induced by variation of polarization charge screening conditions under measurement with scanning probe techniques",

abstract = "Scanning tunneling spectroscopy in ultrahigh vacuum conditions and conductive atomic-force microscopy in ambient conditions were used to study local electroresistive properties of fer-roelectric tunnel junctions SrTiO3/La0.7Sr0.3MnO3/BaTiO3. Interestingly, experimental current-volt-age characteristics appear to strongly depend on the measurement technique applied. It was found that screening conditions of the polarization charges at the interface with a top electrode differ for two scanning probe techniques. As a result, asymmetry of the tunnel barrier height for the opposite ferroelectric polarization orientations may be influenced by the method applied to study the local tunnel electroresistance. Our observations are well described by the theory of electroresistance in ferroelectric tunnel junctions. Based on this, we reveal the main factors that influence the polariza-tion-driven local resistive properties of the device under study. Additionally, we propose an approach to enhance asymmetry of ferroelectric tunnel junctions during measurement. While keeping the high locality of scanning probe techniques, it helps to increase the difference in the value of tunnel electroresistance for the opposite polarization orientations.",

keywords = "Ferroelectric tunnel junctions, Scanning tunneling spectroscopy in ultrahigh vacuum, Tunnel electroresistance",

author = "Natalia Andreeva and Anatoliy Petukhov and Oleg Vilkov and Adrian Petraru and Victor Luchinin",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = dec,

day = "7",

doi = "10.3390/nano11123323",

language = "English",

volume = "11",

journal = "Nanomaterials",

issn = "2079-4991",

publisher = "MDPI AG",

number = "12",

}

RIS

TY - JOUR

T1 - Local electric property modification of ferroelectric tunnel junctions induced by variation of polarization charge screening conditions under measurement with scanning probe techniques

AU - Andreeva, Natalia

AU - Petukhov, Anatoliy

AU - Vilkov, Oleg

AU - Petraru, Adrian

AU - Luchinin, Victor

PY - 2021/12/7

Y1 - 2021/12/7

N2 - Scanning tunneling spectroscopy in ultrahigh vacuum conditions and conductive atomic-force microscopy in ambient conditions were used to study local electroresistive properties of fer-roelectric tunnel junctions SrTiO3/La0.7Sr0.3MnO3/BaTiO3. Interestingly, experimental current-volt-age characteristics appear to strongly depend on the measurement technique applied. It was found that screening conditions of the polarization charges at the interface with a top electrode differ for two scanning probe techniques. As a result, asymmetry of the tunnel barrier height for the opposite ferroelectric polarization orientations may be influenced by the method applied to study the local tunnel electroresistance. Our observations are well described by the theory of electroresistance in ferroelectric tunnel junctions. Based on this, we reveal the main factors that influence the polariza-tion-driven local resistive properties of the device under study. Additionally, we propose an approach to enhance asymmetry of ferroelectric tunnel junctions during measurement. While keeping the high locality of scanning probe techniques, it helps to increase the difference in the value of tunnel electroresistance for the opposite polarization orientations.

AB - Scanning tunneling spectroscopy in ultrahigh vacuum conditions and conductive atomic-force microscopy in ambient conditions were used to study local electroresistive properties of fer-roelectric tunnel junctions SrTiO3/La0.7Sr0.3MnO3/BaTiO3. Interestingly, experimental current-volt-age characteristics appear to strongly depend on the measurement technique applied. It was found that screening conditions of the polarization charges at the interface with a top electrode differ for two scanning probe techniques. As a result, asymmetry of the tunnel barrier height for the opposite ferroelectric polarization orientations may be influenced by the method applied to study the local tunnel electroresistance. Our observations are well described by the theory of electroresistance in ferroelectric tunnel junctions. Based on this, we reveal the main factors that influence the polariza-tion-driven local resistive properties of the device under study. Additionally, we propose an approach to enhance asymmetry of ferroelectric tunnel junctions during measurement. While keeping the high locality of scanning probe techniques, it helps to increase the difference in the value of tunnel electroresistance for the opposite polarization orientations.

KW - Ferroelectric tunnel junctions

KW - Scanning tunneling spectroscopy in ultrahigh vacuum

KW - Tunnel electroresistance

UR - http://www.scopus.com/inward/record.url?scp=85120609213&partnerID=8YFLogxK

U2 - 10.3390/nano11123323

DO - 10.3390/nano11123323

M3 - Article

AN - SCOPUS:85120609213

VL - 11

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 12

M1 - 3323

ER -

ID: 89591106