Effect of electron doping the metamagnet Sr3-yLayRu2O7

J. Farrell; R. S. Perry; A. Rost; J. F. Mercure; N. Kikugawa; S. A. Grigera; A. P. Mackenzie

doi:10.1103/PhysRevB.78.180409

Effect of electron doping the metamagnet Sr_3-yLa_yRu₂O₇

J. Farrell, R. S. Perry, A. Rost, J. F. Mercure, N. Kikugawa, S. A. Grigera, A. P. Mackenzie

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

Abstract

We study the effects of adding electrons to the conduction bands of the itinerant metamagnet Sr3Ru2O7 using substitution of La3+ onto the Sr2+ site. Small changes to the chemical potential have a large effect: adding only 0.03 electrons per Ru reduces the electronic specific-heat coefficient by 30%, but makes no corresponding change to the temperature (similar to 8 K) at which the electronic specific-heat coefficient shows its maximum. The observations are incompatible with a simple rigid-band shift, raising the possibility that a many-body resonance plays a key role in the physics of Sr3Ru2O7.

Original language	English
Article number	180409
Number of pages	4
Journal	Physical Review. B, Condensed matter and materials physics
Volume	78
DOIs	https://doi.org/10.1103/PhysRevB.78.180409
Publication status	Published - Nov 2008

Keywords

QUALITY SINGLE-CRYSTALS
QUANTUM CRITICALITY
RUTHENATE SR3RU2O7
MAGNETIC-FIELD
INSULATOR

Access to Document

10.1103/PhysRevB.78.180409

Cite this

@article{b6ebbfeef26f4658873137499f363dfa,

title = "Effect of electron doping the metamagnet Sr3-yLayRu2O7",

abstract = "We study the effects of adding electrons to the conduction bands of the itinerant metamagnet Sr3Ru2O7 using substitution of La3+ onto the Sr2+ site. Small changes to the chemical potential have a large effect: adding only 0.03 electrons per Ru reduces the electronic specific-heat coefficient by 30%, but makes no corresponding change to the temperature (similar to 8 K) at which the electronic specific-heat coefficient shows its maximum. The observations are incompatible with a simple rigid-band shift, raising the possibility that a many-body resonance plays a key role in the physics of Sr3Ru2O7.",

keywords = "QUALITY SINGLE-CRYSTALS, QUANTUM CRITICALITY, RUTHENATE SR3RU2O7, MAGNETIC-FIELD, INSULATOR",

author = "J. Farrell and Perry, {R. S.} and A. Rost and Mercure, {J. F.} and N. Kikugawa and Grigera, {S. A.} and Mackenzie, {A. P.}",

year = "2008",

month = nov,

doi = "10.1103/PhysRevB.78.180409",

language = "English",

volume = "78",

journal = "Physical Review. B, Condensed matter and materials physics",

issn = "1098-0121",

publisher = "American Physical Society",

}

TY - JOUR

T1 - Effect of electron doping the metamagnet Sr3-yLayRu2O7

AU - Farrell, J.

AU - Perry, R. S.

AU - Rost, A.

AU - Mercure, J. F.

AU - Kikugawa, N.

AU - Grigera, S. A.

AU - Mackenzie, A. P.

PY - 2008/11

Y1 - 2008/11

N2 - We study the effects of adding electrons to the conduction bands of the itinerant metamagnet Sr3Ru2O7 using substitution of La3+ onto the Sr2+ site. Small changes to the chemical potential have a large effect: adding only 0.03 electrons per Ru reduces the electronic specific-heat coefficient by 30%, but makes no corresponding change to the temperature (similar to 8 K) at which the electronic specific-heat coefficient shows its maximum. The observations are incompatible with a simple rigid-band shift, raising the possibility that a many-body resonance plays a key role in the physics of Sr3Ru2O7.

AB - We study the effects of adding electrons to the conduction bands of the itinerant metamagnet Sr3Ru2O7 using substitution of La3+ onto the Sr2+ site. Small changes to the chemical potential have a large effect: adding only 0.03 electrons per Ru reduces the electronic specific-heat coefficient by 30%, but makes no corresponding change to the temperature (similar to 8 K) at which the electronic specific-heat coefficient shows its maximum. The observations are incompatible with a simple rigid-band shift, raising the possibility that a many-body resonance plays a key role in the physics of Sr3Ru2O7.

KW - QUALITY SINGLE-CRYSTALS

KW - QUANTUM CRITICALITY

KW - RUTHENATE SR3RU2O7

KW - MAGNETIC-FIELD

KW - INSULATOR

UR - http://www.scopus.com/inward/record.url?scp=57349163134&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.78.180409

DO - 10.1103/PhysRevB.78.180409

M3 - Article

SN - 1098-0121

VL - 78

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

M1 - 180409

ER -

Effect of electron doping the metamagnet Sr_3-yLa_yRu₂O₇

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

EP/C523229/1: Multidisciplinary Critical Mass in Computational Algebra and Applications

GR/T261139 EPSRC: Portfolio Partnership on "Novel Quantum Order in Interacting Electron Metals

Cite this

Effect of electron doping the metamagnet Sr3-yLayRu2O7

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

EP/C523229/1: Multidisciplinary Critical Mass in Computational Algebra and Applications

GR/T261139 EPSRC: Portfolio Partnership on "Novel Quantum Order in Interacting Electron Metals

Cite this

Effect of electron doping the metamagnet Sr_3-yLa_yRu₂O₇