BROWSE

Related Scientist

CCES's photo.

CCES
강상관계 물질 연구단
more info

ITEM VIEW & DOWNLOAD

Sizable Suppression of Thermal Hall Effect upon Isotopic Substitution in SrTiO3

Cited 0 time in webofscience Cited 0 time in scopus
16 Viewed 0 Downloaded
Title
Sizable Suppression of Thermal Hall Effect upon Isotopic Substitution in SrTiO3
Author(s)
Sangwoo Sim; Heejun Yang; Ha-Leem Kim; Matthew J. Coak; Mitsuru Itoh; Noda, Yukio; Je-Geun Park
Publication Date
2021-01
Journal
PHYSICAL REVIEW LETTERS, v.126, no.1, pp.1 - 5
Publisher
AMER PHYSICAL SOC
Abstract
We report measurements of the thermal Hall effect in single crystals of both pristine and isotopically substituted strontium titanate. We discovered a 2 orders of magnitude difference in the thermal Hall conductivity between (SrTiO3)-O-16 and O-18-enriched (SrTiO3)-O-18 samples. In most temperature ranges, the magnitude of thermal Hall conductivity (rc xy ) in (SrTiO3)-O-18 is proportional to the magnitude of the longitudinal thermal conductivity which suggests a phonon-mediated thermal Hall effect. However, they deviate in the temperature of their maxima, and the thermal Hall angle ratio (vertical bar kappa(xy)/kappa(xx)vertical bar) shows anomalously decreasing behavior below the ferroelectric Curie temperature T-c similar to 25 K. This observation suggests a new underlying mechanism, as the conventional scenario cannot explain such differences within the slight change in phonon spectrum. Notably, the difference in magnitude of thermal Hall conductivity and rapidly decreasing thermal Hall angle ratio in (SrTiO3)-O-18 is correlated with the strength of quantum critical fluctuations in this displacive ferroelectric. This relation points to a link between the quantum critical physics of strontium titanate and its thermal Hall effect, a possible clue to explain this example of an exotic phenomenon in nonmagnetic insulating systems.
URI
https://pr.ibs.re.kr/handle/8788114/9556
DOI
10.1103/PhysRevLett.126.015901
ISSN
0031-9007
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse